What Is a Use Case? Examples & How to Write One

A use case explains how a person, system, or external service interacts with a product or process to achieve a specific goal. It turns an abstract requirement into a practical sequence of actions that teams can understand, discuss, test, and improve. Use cases are widely used in software development, business analysis, product management, system design, and process improvement because they focus on real behavior. Instead of describing only what a system contains, a use case explains what someone expects to accomplish with it. This makes complicated requirements easier for technical and nontechnical stakeholders to understand. A good use case ultimately connects a user need with the system behavior required to satisfy that need.

Understanding how to write a use case is especially valuable when a project involves several users, workflows, rules, exceptions, or system integrations. A clear use case can help developers understand functionality, testers create relevant test scenarios, and business teams confirm whether the planned solution meets actual needs. Modern product teams may combine use cases with user stories, acceptance criteria, prototypes, and process diagrams rather than relying on a single documentation method. The format can therefore be detailed or lightweight depending on the complexity of the project. What matters most is clarity about the actor, goal, trigger, normal flow, and possible alternative outcomes. This guide explains those elements with practical use case examples and a straightforward writing process.

What Is a Use Case?

A use case is a written description of how an actor interacts with a system to accomplish a defined objective. The actor may be a customer, employee, administrator, software application, payment service, or another external entity that interacts with the system. A use case normally begins with a trigger and follows the interaction through a series of steps until the intended outcome is reached. It can also document exceptions, alternative paths, conditions, and business rules that affect the interaction. The emphasis is not simply on a feature but on how that feature supports a real-world goal. For example, “customer completes an online purchase” is a use case because it describes a meaningful interaction with an outcome.

The easiest way to understand use case meaning is to think about a system from the perspective of someone trying to accomplish something. A banking application may contain dozens of features, but users interact with those features through goals such as transferring money, viewing transactions, resetting a password, or paying a bill. Each of those goals can become a separate use case containing the actions necessary for successful completion. This goal-oriented structure keeps requirements connected to user needs rather than describing technology in isolation. It also gives teams a practical way to discuss expected system behavior. When everyone understands the goal being supported, decisions about screens, data, validation, and functionality become easier to evaluate.

A use case can be short and informal or highly detailed depending on the complexity and risk of the project. A small internal tool might need only an actor, goal, trigger, basic flow, and expected result to communicate the requirement clearly. A banking, healthcare, insurance, or enterprise platform may need additional information about permissions, security rules, exceptions, audit requirements, dependencies, and failure conditions. Detailed use case documentation becomes particularly useful when the same workflow can produce several different outcomes. Teams can review those outcomes before development begins and identify missing requirements earlier. The amount of documentation should therefore reflect the decisions the team needs to make rather than following complexity simply for its own sake.

Use cases are strongly associated with requirements engineering and the Unified Modeling Language, often called UML, but they are useful far beyond formal software modeling. Product managers may use them to describe feature behavior, business analysts may document operational workflows, and customer experience teams may analyze how people complete important tasks. Organizations can also create business use cases that describe how a process works across people, departments, and systems. In every version, the underlying idea remains largely the same: identify an actor, identify a goal, and explain the interactions that lead toward that goal. This makes the technique flexible enough for websites, applications, internal processes, automation systems, and physical service environments.

A strong use case answers several practical questions without forcing the reader to interpret vague requirements. It identifies who is performing the action, what that person wants, what must be true beforehand, how the interaction normally proceeds, and what happens afterward. It may also explain what happens when information is incorrect, a service becomes unavailable, a user changes direction, or a business rule prevents completion. These details give teams a fuller picture of system behavior than a simple feature statement usually provides. They also create a common language for conversations between business and technical stakeholders. In that sense, a use case is both a requirements tool and a communication tool that helps reduce misunderstanding.

Why Are Use Cases Important?

Use cases are important because they translate business needs into concrete interactions that project teams can evaluate before building a solution. A requirement such as “the website needs online ordering” communicates a general idea but leaves many practical questions unanswered. A use case can explain how a customer selects products, enters delivery details, chooses payment, receives validation, and completes the purchase. It can then describe what happens if an item becomes unavailable or a payment fails during checkout. Those details expose decisions that might otherwise remain hidden until development or testing. By discussing expected behavior earlier, teams reduce ambiguity and create a clearer shared understanding of what the system should actually accomplish.

Another major benefit of use cases is their ability to keep projects centered on user goals rather than internal technical features. Development teams can easily become focused on databases, APIs, screens, components, integrations, and infrastructure because those elements are necessary for implementation. However, customers rarely care about those components individually unless they help complete an important task. Use case analysis shifts attention toward outcomes such as booking an appointment, submitting a request, downloading an invoice, or updating an account. Teams can then evaluate whether each technical decision supports that desired outcome. This user-centered perspective is especially useful during product planning because it helps distinguish meaningful functionality from features that add complexity without solving an important problem.

Use cases can also improve communication among stakeholders who possess different levels of technical knowledge. Business leaders may understand customer needs but not software architecture, while developers may understand technical constraints without knowing every operational rule. Designers, testers, compliance specialists, and customer support teams may have additional perspectives on the same workflow. A well-written use case gives these participants a shared scenario that they can review together. Instead of debating vague terminology, they can discuss specific actions, conditions, and outcomes within the interaction. This makes disagreements easier to identify and resolve because everyone is examining the same workflow rather than imagining different versions of how a feature is supposed to function.

Testing is another area where clearly written use cases provide significant value because the documented flows can inspire realistic test scenarios. The main success scenario shows testers what should happen when everything works as expected, while alternate flows reveal additional situations that require verification. A checkout use case, for instance, may lead to tests involving valid payment, declined payment, expired cards, unavailable products, incorrect addresses, or interrupted connections. The use case does not necessarily replace formal test cases or acceptance criteria, but it provides valuable context for creating them. Developers can also use the documented behavior to confirm that implementation matches the agreed workflow. This alignment between requirements and testing reduces the risk that important situations will be overlooked.

Use cases are particularly valuable when systems contain several integrations or business rules that interact with one another. A simple action such as scheduling a medical appointment might involve patient authentication, provider availability, insurance information, reminder services, calendars, payment policies, and cancellation rules. Without a structured scenario, teams can overlook dependencies because each component may be considered separately. Use case documentation brings those elements together around a complete user journey. It also helps teams spot edge cases and questions before they become expensive implementation problems. For this reason, use cases remain relevant even in modern agile environments where teams prefer lightweight documentation and frequent delivery over lengthy traditional specifications.

What Are the Main Components of a Use Case?

The first important component of a use case is its title or goal, which should immediately communicate what the actor wants to accomplish. Effective titles usually begin with a clear action such as “Place an Order,” “Reset a Password,” “Schedule an Appointment,” or “Generate a Report.” A vague name such as “Account Function” provides little information about the desired outcome and makes documentation harder to navigate. The title should represent one meaningful objective rather than combining several unrelated activities into a single use case. Keeping the goal focused also makes the interaction easier to describe, test, and maintain. When a title clearly communicates the outcome, readers can quickly determine whether the use case is relevant to the requirement they are reviewing.

The actor is the person, role, system, or service that interacts with the subject of the use case. In a shopping application, possible actors could include a customer, administrator, warehouse employee, payment processor, or delivery service. Actors should normally be identified by roles rather than individual names because use cases describe repeatable behavior rather than one specific person’s activity. A primary actor initiates the interaction because that actor wants to achieve the main goal. Supporting or secondary actors may provide information or services required during the process. Clearly defining actors prevents confusion about responsibilities and helps teams identify permissions, integrations, and dependencies that may affect the workflow.

Preconditions describe what must already be true before the use case begins, while triggers explain the event that starts the interaction. For example, a precondition for transferring money might state that the customer has successfully logged into an active banking account. The trigger could be the customer selecting the option to transfer funds from the account dashboard. Preconditions are useful because they prevent the main flow from becoming crowded with setup steps that belong somewhere else. Triggers establish a clear starting point so readers understand exactly when the scenario begins. Together, these elements define the context of the use case and help separate one workflow from related workflows that may occur immediately before or afterward.

The main success scenario, sometimes called the basic flow or happy path, describes the normal sequence of interactions leading to the desired result. Each step should explain either an action performed by the actor or a response performed by the system. For an online order, the customer might select an item, add it to the cart, provide shipping information, choose payment, and submit the order. The system may validate the information, authorize payment, create the order, update inventory, and display confirmation. The steps should remain focused on observable behavior rather than unnecessary implementation details such as specific database operations. A reader should be able to follow the workflow easily and understand how the actor reaches the intended outcome.

Alternative flows, exception flows, and postconditions complete the picture by explaining what may happen outside the normal success path. An alternative flow might describe the customer applying a discount code, choosing store pickup, or selecting a saved payment method. An exception flow could describe declined payment, an unavailable product, invalid information, or a system error that prevents completion. Postconditions describe the state of the system after the use case ends, such as an order being created and inventory being updated. Some teams also include assumptions, business rules, priorities, frequency, acceptance criteria, and related requirements when those details are useful. These additional components make complex use cases more precise without changing their basic goal-oriented structure.

How to Write a Use Case Step by Step

Start writing a use case by identifying a single meaningful goal that an actor wants to accomplish with the system. Avoid beginning with technical functionality because the purpose is to describe an interaction from the perspective of achieving an outcome. Instead of starting with “payment API integration,” consider the user goal behind it, such as “customer pays for an online order.” The goal should be narrow enough that the interaction can be described clearly but meaningful enough to deliver recognizable value. If the proposed use case contains several independent goals, separate them into multiple use cases. Establishing the correct scope at the beginning prevents long, confusing documents that are difficult to review and maintain.

Next, identify the primary actor and any supporting actors involved in completing the goal. Ask who initiates the process, who receives the main value, and whether another system or service must participate. An employee requesting vacation might be the primary actor, while a manager and human resources system could become supporting actors later in the workflow. At this stage, consider what the actor is allowed to do and what information the system already knows about that actor. Permissions can influence both the normal flow and potential exception paths. Defining actors before writing detailed steps makes it easier to understand responsibilities and ensures the use case does not accidentally assign actions to the wrong participant.

After identifying the actors, document the preconditions, trigger, and expected postconditions for the use case. Preconditions should include only conditions required before the interaction can begin rather than every fact about the surrounding system. A password reset use case might require that the user already has a registered account, while successful login would not necessarily be required. The trigger could be the user selecting “Forgot Password” on the login screen. A successful postcondition might state that the user’s password has been updated and the previous password can no longer be used. Defining these boundaries establishes a clear beginning and ending before the detailed sequence is written.

The next step is writing the main success scenario as a simple sequence of actor actions and system responses. Begin with the trigger, then describe each interaction in the order it normally occurs until the goal is successfully completed. Keep every step concise and observable so that stakeholders can understand the behavior without needing to know internal implementation details. If a step contains several independent actions, divide it into smaller steps to improve clarity. Avoid describing interface details unless they are important to the requirement, because screens and designs can change while the underlying use case remains valid. The objective is to capture essential system behavior rather than create a detailed instruction manual for the interface.

Finally, review each step and ask what could happen differently, fail, require a decision, or depend on a business rule. Those situations can be added as alternative or exception flows linked to the relevant point in the main scenario. For example, a registration use case might need alternate flows for an existing email address, a weak password, failed verification, or missing required information. After documenting those paths, review the complete use case with developers, testers, designers, product owners, and relevant business stakeholders. Remove unnecessary detail and resolve unclear terminology before treating the use case as complete. A useful use case should be easy to follow, testable, focused on one goal, and detailed enough to prevent significant misunderstandings.

Practical Use Case Examples

Consider an ecommerce use case called “Complete an Online Purchase,” where the primary actor is a customer who wants to buy products from a website. The customer has already added at least one available product to the shopping cart, which becomes an important precondition for beginning checkout. The customer starts the use case by selecting checkout, entering shipping details, choosing a delivery option, and providing payment information. The system validates the information, confirms availability, processes payment, creates the order, and displays an order confirmation. An alternative flow might allow the customer to use a saved address or promotional code. Exception flows could cover declined payment, incorrect address information, or inventory becoming unavailable before the transaction finishes.

A healthcare booking platform could use a scenario called “Schedule a Medical Appointment” to define the interaction between a patient and scheduling system. The patient begins by selecting a specialty, provider, location, or appointment type depending on the application’s design. The system retrieves available time slots, and the patient chooses a suitable appointment before confirming required personal or insurance information. The system validates the information, reserves the selected time, creates the appointment, and sends confirmation to the patient. Alternative flows could include selecting a telehealth visit, joining a waiting list, or choosing another provider. Exception flows might address an unavailable slot, incomplete patient information, scheduling restrictions, or a temporary failure in an external calendar service.

A software-as-a-service platform may document a use case titled “Invite a Team Member” for account administrators managing organizational access. The administrator opens the member management area, enters the new user’s email address, selects an appropriate role, and sends an invitation. The system validates whether the account has sufficient permissions and whether the email address is eligible to receive another invitation. It then creates a pending invitation and sends a secure invitation message to the specified recipient. An alternative flow could allow administrators to invite several users simultaneously through bulk upload. Exception flows could cover duplicate members, invalid addresses, expired subscriptions, insufficient seat availability, or an administrator attempting to assign permissions above their own authorization level.

Customer support teams can also benefit from use cases that describe operational processes rather than traditional software features. A use case called “Resolve a Customer Refund Request” might involve a support agent reviewing an order, confirming eligibility, selecting the refund reason, and initiating repayment. The system could verify the original transaction, apply refund policies, send the request to a payment processor, and update the order record. If manager approval is required above a certain amount, the workflow can include an alternate path for authorization. Exceptions could include transactions outside the refund window, previously refunded orders, missing payment records, or failed payment processor responses. This example shows how use cases can connect human decisions with system behavior and business policies.

Artificial intelligence applications can also be described through use cases when teams focus on user goals rather than simply stating that a product contains AI. Consider a customer service platform with a use case called “Generate a Suggested Support Reply” for a support agent. The agent opens a customer conversation and requests assistance, while the system analyzes permitted conversation context and generates a draft response. The agent reviews, edits, accepts, or rejects the suggestion before any message is sent to the customer. Alternative flows could include requesting another suggestion or choosing a different response tone. Exception flows may address insufficient context, restricted data, unavailable models, unsupported requests, or confidence levels that require the system to avoid producing an automated recommendation.

What Is a Use Case Diagram?

A use case diagram is a visual representation showing actors, system boundaries, and the use cases available to those actors. It is commonly associated with UML and provides a high-level view of how external participants interact with a system. Actors are typically shown outside a system boundary, while individual use cases appear inside the boundary as named activities. Lines connect actors with the use cases they participate in, making relationships easier to understand at a glance. A diagram does not usually explain the detailed sequence of steps inside each interaction. Instead, it acts as a map of system functionality from the perspective of users and other external entities.

Use case diagrams are particularly helpful during early requirements discussions because they make system scope easier to visualize. Imagine an ecommerce platform with actors such as Customer, Administrator, Payment Processor, and Shipping Service. The Customer might connect to use cases including Browse Products, Place Order, Track Order, and Request Return. The Administrator could interact with Manage Products, Process Returns, and View Reports, while external services participate in payment or delivery-related use cases. Seeing these relationships visually can reveal missing actors or unexpected dependencies. The diagram therefore complements written use cases by showing the broader structure in which individual interactions exist.

Relationships between use cases can sometimes be represented through concepts such as include, extend, and generalization when formal UML modeling is useful. An include relationship indicates that one use case consistently uses behavior defined in another use case, which can reduce unnecessary duplication. An extend relationship represents optional or conditional behavior that adds to another use case under particular circumstances. Generalization may represent specialized actors or use cases that inherit broader behavior from a more general concept. These relationships can make models more expressive, but they should not be introduced merely to make diagrams appear sophisticated. If stakeholders find the model difficult to understand, a simpler diagram may provide more communication value.

A common mistake is treating a use case diagram as a replacement for detailed use case documentation. The diagram may show that a customer can place an order, but it does not explain how products are validated, payment is handled, or failure situations are managed. Those behavioral details normally belong in the written use case, acceptance criteria, workflow specification, or supporting documentation. Likewise, a detailed written scenario may become difficult to understand without a high-level diagram showing where it fits within the system. The two forms therefore serve different but complementary purposes. Diagrams are useful for understanding scope and relationships, while written use cases are better suited to explaining sequence, conditions, alternatives, and expected outcomes.

Not every project needs a formal UML use case diagram, especially when the system is small and the team already shares a strong understanding of its actors and goals. A simple whiteboard sketch, product map, or lightweight workflow may provide enough context for straightforward applications. Larger systems with many roles, permissions, integrations, or functional areas can benefit more from structured visualization. The decision should depend on whether the diagram helps people understand the system and make better decisions. Documentation has value when it reduces uncertainty, not when it exists only because a methodology says it should. Teams should therefore use diagrams at the level of detail that supports communication without creating unnecessary maintenance work.

Use Case vs User Story vs Scenario

A use case and a user story both describe user needs, but they usually do so at different levels of detail. A user story is commonly written as a short statement such as, “As a customer, I want to track my order so that I know when it will arrive.” That sentence clearly identifies the user, desired capability, and value, making it useful for agile planning and backlog management. A use case can take the same goal and describe the actual interaction step by step. It may include preconditions, system responses, alternative paths, errors, and postconditions. User stories are therefore excellent for concise planning, while use cases are helpful when teams need a deeper behavioral understanding of a requirement.

User stories are often combined with acceptance criteria that define conditions a feature must satisfy before it can be considered complete. Those criteria may cover several situations without describing the entire workflow in narrative order. A use case, by contrast, generally emphasizes the sequence of interactions between actors and the system as the goal progresses. Neither technique is automatically better because they solve somewhat different documentation problems. A simple feature may need only a user story with clear acceptance criteria, while a complicated workflow may benefit from a supporting use case. Many modern teams use both, allowing concise backlog items to link to deeper behavioral documentation where additional detail is necessary.

The term scenario is also closely related to use cases, but it usually refers to one particular path through a broader use case. The main success scenario represents the path where the actor reaches the desired outcome without significant exceptions. An alternate scenario might describe a valid variation, while an exception scenario explains how the system behaves when something goes wrong. For example, “Withdraw Cash” may be the complete ATM use case, while withdrawing successfully with sufficient funds is one scenario within it. Attempting to withdraw more than the available balance represents another scenario. Thinking in scenarios helps teams explore the different ways a single user goal can unfold without unnecessarily creating a separate use case for every variation.

A business process describes a broader sequence of activities used by an organization to achieve an operational outcome and may involve several use cases. An employee onboarding process, for instance, could include creating an employee record, requesting equipment, assigning training, establishing payroll, and provisioning system access. Each meaningful interaction with a particular system could potentially become its own use case. The business process provides the end-to-end operational perspective, while individual use cases explain how participants interact with systems at specific points. Business process modeling therefore tends to examine work across departments and tools rather than focusing on one system boundary. Understanding this difference prevents teams from creating enormous use cases that try to document an entire organizational process.

A functional requirement states something the system must be capable of doing, whereas a use case shows how that capability supports a goal through interaction. A requirement might state that the system must allow customers to cancel eligible orders before shipment. The related use case could describe how a customer selects an order, requests cancellation, receives eligibility validation, confirms the action, and sees the updated order status. One use case may help clarify several functional requirements, and one functional requirement may appear in more than one user interaction. Requirements, user stories, scenarios, and use cases can therefore work together instead of competing with one another. Successful teams choose the combination that creates sufficient clarity with the least unnecessary documentation.

Best Practices for Writing Effective Use Cases

Write every use case from the perspective of an actor pursuing a meaningful goal rather than from the perspective of internal system components. A title such as “Process Customer Payment” is usually clearer than “Payment Database Operation” because it communicates an outcome stakeholders can understand. The main flow should focus on what the actor does and how the system visibly responds to those actions. Technical architecture details can be documented separately unless they directly affect required behavior. This approach keeps the use case stable even if implementation technologies change later. It also encourages teams to evaluate whether the proposed functionality delivers actual value rather than simply adding another internal capability to the system.

Keep the level of detail consistent throughout the use case so that readers can follow the sequence without repeatedly shifting between broad goals and tiny interface actions. One step should not say “Customer completes checkout” while the next describes the exact location and dimensions of a button on a particular screen. Choose a level of abstraction that captures meaningful interactions required to understand system behavior. Interface specifications can provide detailed design information when visual precision is necessary. This separation also prevents use cases from becoming outdated every time a label, layout, or screen arrangement changes. A well-structured use case explains what must happen while leaving room for designers and engineers to determine appropriate implementation details.

Use clear, specific language and avoid vague phrases such as “the system handles the request appropriately” or “the user enters necessary information.” Those statements create questions because different readers may interpret “appropriately” or “necessary” in different ways. When the exact behavior matters, describe it directly by explaining what information is validated, what response is provided, or what state changes after an action. At the same time, avoid overexplaining details that do not influence the requirement. The goal is precision rather than maximum length. A concise step that can be understood and tested is more useful than a complicated paragraph filled with implementation terminology that distracts from the behavior stakeholders actually need to verify.

Review alternative and exception flows carefully because some of the most important requirements appear outside the happy path. Real users enter incorrect information, change decisions, lose connections, lack permissions, choose unexpected options, and encounter external service failures. A use case that documents only perfect conditions can create a misleading impression of how simple the feature will be to build. Consider validation errors, unavailable data, permission problems, duplicate actions, timeouts, cancellations, and important business rules where relevant. Not every imaginable edge case deserves documentation, so prioritize situations that significantly affect user experience, system integrity, compliance, or implementation decisions. This keeps the use case realistic without turning it into an exhaustive catalog of unlikely possibilities.

Finally, treat use cases as working communication artifacts rather than documents that are written once and forgotten. Requirements change as teams learn more about customers, regulations, technical constraints, business models, and operating conditions. When a change affects the interaction, the relevant use case should be reviewed so that documentation continues to reflect expected behavior. Teams should also remove obsolete details rather than endlessly adding notes that make the document harder to understand. Linking use cases to related requirements, user stories, diagrams, prototypes, or acceptance criteria can improve traceability when projects become complex. The best documentation is not necessarily the longest documentation; it is the documentation that helps people make consistent decisions and build the correct solution.

Common Use Case Mistakes to Avoid

One of the most common mistakes is creating a use case around a system feature rather than around an actor’s goal. Names such as “Database Management,” “API Processing,” or “Email Module” describe parts of a solution but do not clearly communicate what an external actor wants to accomplish. Goal-oriented names such as “Update Customer Profile,” “Submit Support Request,” or “Send Order Confirmation” provide much stronger context. Starting with a meaningful goal also makes it easier to determine when the use case begins and ends. If the title cannot be connected to a recognizable actor outcome, the scope may need reconsideration. Use cases work best when the reader can quickly answer who wants something and what success looks like.

Another mistake is putting too many goals into one use case until it becomes a description of an entire application or business operation. A document called “Manage Customer Account” might contain registration, login, password reset, profile editing, subscriptions, payments, and account deletion. Those actions involve different triggers, conditions, rules, and outcomes, making the resulting use case difficult to understand and maintain. Breaking the broad concept into focused use cases allows each interaction to be analyzed independently. Related use cases can still be connected through diagrams, documentation links, or process maps. Smaller goal-focused use cases also make testing easier because teams can associate specific scenarios and acceptance criteria with particular behaviors.

Teams sometimes make the opposite mistake by dividing behavior into such tiny pieces that every button click becomes a separate use case. A use case should normally represent a meaningful goal rather than an individual interface action that has little standalone value. “Click Submit Button” is rarely a useful use case because the actor’s real goal may be registering an account, submitting a form, or placing an order. Excessive fragmentation creates documentation overhead and makes the larger workflow harder to see. When deciding whether something deserves its own use case, ask whether the action provides a recognizable outcome to the actor. If it exists only as one step inside another goal, it probably belongs within that larger interaction.

Ignoring alternate flows is another major problem because software rarely operates entirely through a single predictable happy path. Users can provide invalid credentials, choose unavailable dates, enter duplicate information, cancel transactions, or lack permission to complete certain actions. External services can also fail, time out, or return unexpected responses that influence the outcome. When these situations are relevant but undocumented, developers may make assumptions that differ from what product owners or business teams expect. Testers may also overlook behaviors that were never discussed explicitly. Alternative flows do not need to document every theoretical possibility, but they should cover meaningful situations where system behavior affects user success, business rules, security, or data integrity.

The final common mistake is writing use cases without stakeholder review and assuming that one person’s interpretation represents the full requirement. A product manager may understand the desired customer experience, while an engineer recognizes integration limitations and a compliance specialist identifies rules others overlooked. Support teams may know frequent real-world problems that have never appeared in formal requirements. Reviewing a use case with relevant participants exposes these differences while the cost of changing the design is still relatively low. It also helps eliminate ambiguous terminology before it reaches implementation. Use cases create their greatest value when they become a shared conversation about expected behavior rather than an isolated document created by one contributor.

Frequently Asked Questions About Use Cases

What is a use case in simple terms?

A use case is a description of how a person or another system interacts with a product to achieve a particular goal. It explains who performs the action, what happens during the interaction, and what successful completion looks like.

What is an example of a use case?

An example of a use case is “Customer Resets a Forgotten Password.” The scenario could explain how the customer requests a reset, verifies identity, creates a new password, and receives confirmation that the password has changed.

What is the difference between a use case and a user story?

A user story usually provides a short description of what a user wants and why, while a use case describes the interaction in greater detail. Use cases can include preconditions, main flows, alternative scenarios, exceptions, and postconditions that may not appear directly in a user story.

Who writes use cases?

Business analysts, product managers, systems analysts, developers, designers, and other project stakeholders can write use cases. The person creating them should understand the user’s goal and collaborate with technical and business participants to confirm that the documented behavior is accurate.

Do agile teams still use use cases?

Yes, agile teams can use use cases when a workflow is too complex to communicate through a short user story alone. They are often used selectively alongside user stories, acceptance criteria, prototypes, process diagrams, and other lightweight documentation rather than as large formal specifications.