Requirement Analysis is the most important and necessary stage in development phase.

We gather and analyse the requirement of the client. It includes the money transaction as well and what it benefits to the organization etc..

Once the requirement analysis is done, the next stage is to certainly represent and document the software requirements and get them accepted from the project stakeholders.

The next phase is about to bring down all the knowledge of requirements, analysis, and design of the software project. This phase is the product of the last two, like inputs from the customer and requirement gathering.

In this phase of SDLC, the actual development begins, and the programming is built. The implementation of design begins concerning writing code. Developers have to follow the coding guidelines described by their management and programming tools like compilers, interpreters, debuggers, etc. are used to develop and implement the code.

After the code is generated, it is tested against the requirements to make sure that the products are solving the needs addressed and gathered during the requirements stage.

Once the software is certified, and no bugs or errors are stated, then it is deployed.

Once when the client starts using the developed systems, then the real issues come up and requirements to be solved from time to time.