The quick design of a software that is visible to end users leads to ______.

Explanation

In the prototype model the developer produces a "quick design" that concentrates on those parts of the software that will be visible to the user — the input screens, the reports and the output formats — so the customer can react to something concrete before the real system is built. Pressman describes this step literally as a quick design leading to the construction of a prototype. The iterative and incremental models deliver working slices of the finished product rather than a throwaway mock-up, the spiral model is driven by risk analysis in each loop, and the waterfall model produces a complete design document before any code is written. Hence the quick, user-visible design belongs to the prototype model.