Software development life cycle
- 1. SOFTWARE DEVELOPMENT LIFE CYCLE SDLC Phases
- 3. REQUIREMENTS AND ANALYSIS Proper Requirement analysis and specification is critical for any project. The primary objective of this phase is to create a Software requirement specification document(SRS) which has all the details of the customer’s requirements. Exit Criteria: Software Requirement Specification document(SRS)
- 4. DESIGN There are two design phases: High level Design Logical view of the software is designed. Entry criteria: SRS Exit criteria: Functional architechture, Database design Low level Design Detailed design phase. Modules are designed Entry criteria: HLD Exit criteria: Functional specification document, unit test plans
- 5. DEVELOPMENT This is the coding phase. Coding is done based on the project functional specifications in any programming language. Certain industry standards are followed by the project team. Entry criteria: Functional specification document Exit criteria: programs ready for unit testing
- 6. TESTING This is the phase where the actual product/module is tested against the requirements. It has four basic phases. Unit Testing Unit testing is testing the individual units/modules of source code Usually done by developers Integration Testing Testing after integrating one or more modules System Testing Testing the complete product by validating it against the user needs Entry criteria: Programs/modules, test plan, test cases Exit criteria: Test execution reports
- 7. DEPLOYMENT Here the product is testing in the operational environment. Acceptance testing is done by the user to ensure it passes the acceptance criteria Once it is accepted, it is deployed in customer’s production environment. Entry criteria: Tested software Exit criteria: Customer sign off
- 8. MAINTENANCE Once the software is installed in customer’s environment, it should be maintained regularly and should be upgraded with any other new specifications.