Requirement Analysis

What is a requirement?

• It may range from a high-level abstract statement of a service or of a system constraint to a detailed mathematical functional specification.
• This is inevitable as requirements may serve a dual function
• May be the basis for a bid for a contract -therefore must be open to interpretation;
• May be the basis for the contract itself -therefore must be defined in detail;
• Both these statements may be called requirements.

Types of requirement

• User requirements
• Statements in natural language plus diagrams of the services the system provides and its operational constraints. Written for customers.
• System requirements
• A structured document setting out detailed descriptions of the system‟s functions, services and operational constraints. Defines what should be implemented so may be part of a contract between client and contractor.

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