Final answer:
Creating diagrams for client presentations falls under the Design process in the engineering design cycle, where ideas are transformed into visual representations before moving on to implementation.
Step-by-step explanation:
Developing diagrams of requirements for presentation to a client is primarily a part of the Design process. In the engineering design process, developing diagrams is crucial as they serve as visual representations of the project requirements and proposed solutions. These diagrams are typically created after the problem has been defined and possibilities have been explored.
Before presenting to the client, the design team will select the most suitable ideas and create detailed diagrams that represent the look and function of the intended product or structure. This stage is where the team moves from conceptualisation to creating tangible representations, often leading to the implementation phase. It is a moment to convert ideas into technical drawings or models that can communicate the concept effectively to the client.