STLC (Software Testing Life Cycle):
It contains 6 phases.
1) TEST PLANNING
Plan: Plan is a strategic document, which describes how to perform a task in an effective, efficient and optimized way.
Optimization: Optimization is a process of reducing or utilizing the input resources to their maximum and getting the maximum possible output.
Test Plan: It is a strategic document, which describe how to perform testing on an application in an effective, efficient and optimized way. The Test Lead prepares test plan.