Software Development Life Cycle (SDLC)
Learn about different SDLC models and how testing integrates into each phase
30 min•By Priygop Team•Last updated: Feb 2026
SDLC Phases
- Planning: Requirements gathering and analysis
- Design: System and software design
- Implementation: Coding and development
- Testing: Quality assurance and validation
- Deployment: Release to production
- Maintenance: Ongoing support and updates
SDLC Models
- Waterfall: Sequential, linear approach
- Agile: Iterative, collaborative approach
- V-Model: Testing integrated with development
- Spiral: Risk-driven, iterative approach
- DevOps: Continuous integration and deployment
Testing in Different SDLC Models
Example
// Waterfall Model Testing
Requirements → Design → Implementation → Testing → Deployment
// V-Model Testing
Requirements ←→ Acceptance Testing
Design ←→ System Testing
Implementation ←→ Integration Testing
Unit Testing ←→ Unit Code
// Agile Model Testing
Sprint Planning → Development → Testing → Review → Retrospective
(Continuous testing throughout each sprint)
// DevOps Model Testing
Code → Build → Test → Deploy → Monitor
(Continuous testing in CI/CD pipeline)