Design Specification CS Thinking Example 1
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Example 1
easyWhat is a design specification and what should it include for a simple calculator app?
Solution
- 1 Step 1: A design specification is a detailed plan that describes what the software should do, how it should look, and how it should behave — before any coding begins.
- 2 Step 2: For a calculator app it should include: purpose (perform basic arithmetic), inputs (numbers and operators), outputs (calculation results), user interface layout (buttons, display), and functionality (add, subtract, multiply, divide).
- 3 Step 3: It should also specify constraints (e.g., handles numbers up to 10 digits, shows error for division by zero) and success criteria (how to verify it works correctly).
Answer
A design specification describes purpose, inputs, outputs, UI, functionality, constraints, and success criteria — all defined before coding.
Design specifications prevent misunderstandings and scope creep. They serve as a contract between the developer and the client about what will be built.
About Design Specification
A document that describes what a software system should do, how it should behave, and what constraints it must satisfy, before coding begins. A good specification covers functional requirements (what the system does), non-functional requirements (performance, security, usability), and acceptance criteria (how to verify it works).
Learn more about Design Specification →More Design Specification Examples
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