TAILIEUCHUNG - Software Engineering: Chapter 4 - Requirements Engineering

Software Engineering: Chapter 4 - Requirements Engineering presents about Functional and non-functional requirements, The software requirements document, Requirements specification, Requirements engineering processes, Requirements elicitation and analysis, Requirements validation, Requirements management. | 1 20 2015 SOFTWARE ENGINEERING Chapter 4 - Requirements Engineering Jul 2013 Chapter 4. Requirements engineering 2 Topics covered Functional and non-functional requirements The software requirements document Requirements specification Requirements engineering processes Requirements elicitation and analysis Requirements validation Requirements management 1 1 20 2015 Jul 2013 Chapter 4. Requirements engineering 3 Requirements engineering The process of establishing the services that the customer requires from a system and the constraints under which it operates and is developed. The requirements themselves are the descriptions of the system services and constraints that are generated during the requirements engineering process. Jul 2013 Chapter 4. Requirements engineering 4 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. 2 1 20 2015 Jul 2013 Chapter 4. Requirements engineering 5 Requirements abstraction Davis If a company wishes to let a contract for a large software development project it must define its needs in a sufficiently abstract way that a solution is not pre-defined. The requirements must be written so that several contractors can bid for the contract offering perhaps different ways of meeting the client organization s needs. Once a contract has been awarded the contractor must write a system definition for the client in more detail so that the client understands and can validate what the software will do. Both of these documents may be called the requirements document for the system. Jul 2013 Chapter 4. Requirements engineering 6 Types of requirement User requirements .

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• Software Engineering
• Requirements Engineering
• The software requirements document
• Requirements specification
• Requirements engineering processes
• Requirements elicitation and analysis
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• Introduction to software engineering
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• Requirement engineering
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• Software requirements engineering
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• System engineering
• Software requirements document
• Requirements engineering process tasks