4 Development
The development phase will be started after getting perfect and complete project requirements specification. During this phase each sub-system, sub-element or module can be reviewed by the client for verification against their business requirements, ensuring the end product will meet the original objectives. This will find an issue or blemish assuming any, at early phase of the improvement before the application advances into an entire item, subsequently bringing down the expenses of amendments.
Finally, the whole system is used for system testing and it passes functional testing, performance testing, and stress testing to ensure all requirements are met.