Final answer:
The design of a system's processes in the SDLC does not strictly begin in the detailed systems design phase; it is an iterative process that evolves through multiple phases involving prototyping, testing, and refinement.
Step-by-step explanation:
In the Systems Development Life Cycle (SDLC), the assertion that the design of the system's processes begins in the detailed systems design phase is not entirely accurate. The SDLC overview provided demonstrates that design is an iterative process, not strictly a one-phase activity. According to the information, the design begins with a concept and evolves through multiple iterations involving prototyping, testing, and refinement, before arriving at a detailed systems design.
Design teams often revisit steps multiple times to refine the design until the final details are polished. This process is described as a spiral rather than a sequential one because it circles back upon itself as more is learned and improved upon through testing and evaluation. Therefore, it can be concluded that the design of a system's processes actually begins earlier and is refined during the detailed design phase, making use of iterative and spiral design processes to enhance the final product.