Requirements Engineering Process

Software specification or requirements engineering is the process of understanding and defining what services are required and identifying the constraints on these services. Requirements
engineering processes ensures that the software will meet the user expectations, and ending up with a high quality software. It is a four step process, which includes :-

  • Feasibility Study
  • Requirement Gathering
  • Software Requirement Specification
  • Software Requirement Validation

1. Feasibility Study : An estimate is made of whether the identified can be achieved using the current software and hardware technologies, under the current budget, etc. The feasibility study should be cheap and quick; it should inform the decision of whether or not to go ahead with the project.

2. Requirement Gathering : This is the process of deriving the system requirements through observation of existing systems, discussions with stakeholders, etc. This may involve the development of one or more system models and prototypes that can help us understanding the system to be specified.

3. Requirements Specification : It’s the activity of writing down the information gathered during the elicitation and analysis activity into a document that defines a set of requirements. Two types of requirements may be included in this document; user and system requirements.

4. Requirements validation : It’s the process of checking the requirements for realism, consistency and completeness. During this process, our goal is to discover errors in the requirements document. When errors are found, it must be modified to correct these problems.

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