are which describes how to develop, maintain particular software.
The life cycle aims to develop a good quality product/software.
High quality, lowest cost in short time.
Requirement Phase : most critical phase, SRS (Software Requirement Specification) is a detailed description of softwares' requirements
Design Phase : Logical to physical designing.
Build/Development Phase : Coding, longest phase.
Testing Phase : try it before deploy.
Deployment/Delivering Phase : except critical one, defects' solution waits for the next version.
Maintenance : maintain its operational effectiveness