Software Development Life Cycle – SDLC – Waterfall Model
- 1. Quality Assurance / Software Testing Training
- 2. Page 2Classification: Restricted Agenda • What is SDLC and Stages • SDLC Models • Waterfall Model • Incremental Model • Spiral Model • V-Model • Agile Model and Testing • IEEE • Class Assignment
- 3. Page 3Classification: Restricted • What is SDLC and Stages • SDLC Models • Waterfall Model • Incremental Model • Spiral Model • V-Model • Agile Model and Testing • IEEE • Class Assignment Module 2 – SDLC and Quality Standard
- 4. Page 4Classification: Restricted What is SDLC and Stages Software Development Life Cycle(SDLC) SDLC, Software Development Life Cycle is a process used by software industry to design, develop and test high quality software. The SDLC aims to produce a high quality software that meets or exceeds customer expectations, reaches completion within times and cost estimates The software development life cycle (SDLC) is a framework defining tasks performed at each step in the software development process.
- 5. Page 5Classification: Restricted Phases of SDLC • • Requirement Specification and • Analysis • Design • Coding • Testing • Implementation • Maintenance
- 7. Page 7Classification: Restricted Requirement Specification and Analysis User Requirement Specification (USR) Software Requirement Specification (SRS)
- 8. Page 8Classification: Restricted Design The output of SRS is the input of design phase. Two types of design - High Level Design (HLD) Low Level Design (LLD) .
- 9. Page 9Classification: Restricted • High Level Design (HLD) • List of modules and a brief description of each module. • Brief functionality of each module. • Interface relationship among modules. • Dependencies between modules (if A exists, B exists etc). • Database tables identified along with key elements. • Overall architecture diagrams along with technology details. • Low Level Design(LLD) • Detailed functional logic of the module, in pseudo code. • Database tables, with all elements, including their type and size. • All interface details. • All dependency issues • Error message listings • Complete input and outputs for a module.
- 10. Page 10Classification: Restricted Coding Developers use the LLD document and write the code in the programming language specified. Testing The testing process involves development of a test plan, executing the plan and documenting the test results. Implementation Installation of the product in its operational environment.
- 11. Page 11Classification: Restricted Maintenance After the software is released and the client starts using the software, maintenance phase is started. 3 things happen - Bug fixing, Upgrade, Enhancement Bug fixing – bugs arrived due to some untested scenarios. Upgrade – Upgrading the application to the newer versions of the Software Enhancement - Adding some new features into the existing software.
- 12. Page 12Classification: Restricted SDLC Models Waterfall Model Waterfall approach was first SDLC Model to be used widely in Software Engineering to ensure success of the project. In "The Waterfall" approach, the whole process of software development is divided into separate phases. In Waterfall model, typically, the outcome of one phase acts as the input for the next phase sequentially.
- 14. Page 14Classification: Restricted • System is well documented. • Phases correspond with project management phases. • Cost and schedule estimates may be lower and more accurate. • Details can be addressed with more engineering effort if software is large or complex. Waterfall Approach - Advantages