Which one is the least important reason for documenting requirements?

Documenting requirements serves several critical functions in the development process, and while each reason carries a certain weight, the importance can vary depending on the context.

Developers implementing forms based on screen prototypes is indeed a factor in the documentation process; however, it is more about the design phase of development rather than the core necessity of requirements documentation as a whole. The primary purpose of documenting requirements is to ensure a clear and mutual understanding among all stakeholders regarding what needs to be built and why.

On the other hand, the other reasons provided highlight fundamental aspects of requirements documentation that play crucial roles in software projects. For instance, requirements are long-lasting and serve as a reference throughout the entire life-cycle, ensuring continuity and alignment across various phases. They often hold legal significance, protecting both clients and developers by providing a formal basis to assess compliance and fulfillment. Lastly, accessibility of requirements to all project members is vital for fostering collaboration and ensuring that everyone has a consistent understanding of project goals and constraints.

In essence, while the implementation detail mentioned can be important, it does not underlie the foundational necessity of having well-documented requirements, making it the least critical reason among the options presented.