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Business & Workplace Languagenoun · /ˈjuːs keɪs/

use case

In simple English

A use case is a fundamental concept in software development and product design that describes a real-world scenario where a user or system needs to accomplish something using your product or feature. It bridges the gap between abstract requirements and concrete implementation by answering: Who will use this? What do they want to do? Why do they want to do it? Use cases are essential during the planning phase because they help teams understand user needs before writing code. They are documented in requirements meetings, product specifications, and design discussions. In Agile environments, use cases often inform user stories. For example, a use case for an e-commerce app might be: 'A customer browses products, filters by price, adds items to their cart, and checks out securely.' Understanding use cases helps engineers build features that actually solve real problems rather than theoretical ones.

Understand what a use case is in software development and how to write one for your project.

At a glanceCEFR B2
Commonness5/5
Versatility5/5
FormalityCasualFormalNeutral
Spoken ↔ WrittenSpokenWrittenBoth
Directness ↔ DiplomaticDirectDiplomaticDirect
RegionUS and UK
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Say it like this

✓We need to define the use cases before we start coding.
✓What are the main use cases for this API?
✓This feature covers multiple use cases in one solution.

Real examples

in a standup

"We finished mapping out the use cases for the new dashboard yesterday, and now we can start sprint planning."

in a design meeting

"The primary use case is a manager generating monthly reports without writing SQL queries."

in a code review

"This implementation handles the happy path, but we should also consider the edge case use case where the network is offline."

Don't say this

Handle with care. Do not confuse with the verb phrase 'use a case' (like a briefcase). Use case is a noun describing a specific application or scenario.

✕We are going to use case the system tomorrow.
✓We are going to test the system against all use cases tomorrow.— Use case is a noun, not a verb. You cannot 'use case' something. You can test, define, or document use cases.
✕The use case is too complicated, let me simplify the use case.
✓The use case is too complicated; let me simplify the workflow it describes.— Avoid redundancy. A use case already implies a scenario or workflow, so you need not repeat the term unnecessarily.
✕A use case is when we have a problem.
✓A use case describes a scenario where a user achieves a specific goal using the system.— A use case is not simply a problem—it is a complete interaction scenario with actors, goals, and steps.

Other forms

noun (singular)

use case

"The login use case requires email and password verification."

noun (plural)

use cases

"We identified five critical use cases during requirements gathering."

noun (in compound)

use case diagram

"The use case diagram shows all interactions between users and the system."

Often used with

define use casesTo identify and describe specific scenarios. Example: 'We need to define use cases before development begins.'
identify use casesTo discover what scenarios the system needs to support. Example: 'Our team identified three main use cases.'
primary use caseThe main or most important scenario the system must handle. Example: 'The primary use case is mobile payment processing.'
edge case use caseAn unusual or extreme scenario. Example: 'We also need to consider edge case use cases like network failures.'
use case diagramA visual representation of use cases in UML. Example: 'We drew a use case diagram to map all user interactions.'

Similar words

scenarioMore general; a use case is a specific type of scenario with defined actors and goals.
user storySimilar in Agile contexts, but user stories are written from the user perspective. Use cases are more technical and detailed.
requirementBroader term. A use case is one way to express a requirement through concrete scenarios.

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Practice

Try it

4 quick exercises

Complete the sentence

1. We should _______ all the _______ before we start writing code.

Spot the mistake

2. Which sentence uses 'use case' incorrectly?

Pick the most natural phrasing

3. How would you naturally say this in a meeting?

Rewrite naturally

4. Rewrite this in tech English using 'use case': 'We need to think about all the different ways people will use this feature before we build it.'

Questions

Quick poll

Have you said "use case" in a standup this week?

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