3 & 4. Implementation and Testing
The next two stages in our iterative software life cycle, implementation and testing, often work side by side. The flexible and cyclical nature of iterative development allows software development teams to go back and forth between the two until they are happy with the results they have achieved.
Implementation describes the coding that will take place. In this step, developers will write the code to build the desired product, They will work on building the technical architecture of the app, website, or bespoke software that is required by the project. They will also develop the database and programmes of the first iteration model. During the first iteration of such a project, this may look something like MVP development, as the first iteration aims to get the first version of the product launched and ready to be improved upon.
In conjunction with this code being written and implemented, it will be tested in a sort of tandem process. With the iterative development life cycle, the two stages go hand in hand to build the outcome in a steady way. The testing team and QAs will work alongside the development team to test the code for bugs and failure to meet previously outlined requirements. Multiple testing methodologies will be used to ensure a thorough review of the code being built.
These two teams will engage in implementation and testing until the desired results are achieved. Instant feedback is provided which allows the development team to continually improve and adjust. When satisfied, they can move into the final stage of an iteration before the cycle begins again.
The final stage of the iterative software development life cycle is evaluation. In this final step, the team evaluates the entire project so far, which typically includes feedback from the client.
Whether approval or disapproval is provided at this stage, a new iteration will begin again from the beginning. The feedback provided in the evaluation stage will form the basis of the iteration, giving it direction and guidance. Each stage will be revisited until a final, fully functional and signed-off product is designed.
At the end of this first iteration, you have something that resembles a minimum viable product or a functional prototype. Your team will then take this product through further iterations to complete it to a much higher standard. Then the life cycle is complete.