Explore V and Waterfall model
V model (validation and Verification Model) is modified version of waterfall model. V-Model contains validation and testing at same level of abstraction. It emphasizes on performance and correctness. V model is understandable and very easy to use. Works well for small projects where obligations are simply understood. So that in earlier stage itself we can find out any flaws or if any changes comes in any stage itself we will rectify immediately. So, it is very cost effective.