Final answer:
Clients may notice a shift in the project manager's style from openness to new ideas during the conceptual stage to discouraging changes during the implementation phase due to the need to follow detailed plans and maintain timelines.
Step-by-step explanation:
The client might be surprised when the project manager's style changed from inviting new ideas during the conceptual phase to discouraging them during the implementation phase. This change is typical in project management workflows as the focus shifts from exploring possibilities to executing a plan. Initially, during the preparatory phase, a broad range of ideas is encouraged to shape a strong conceptual foundation. As the project moves into the implementation phase, new ideas might disrupt the established plans and timelines, necessitating a more restrictive approach to maintain focus and ensure the project advances within constraints. Frequent changes during the implementation phase can lead to inefficiency, increased costs, and delayed timelines. However, some flexibility is still vital, as unforeseen challenges may require adjustments to the detailed design, relying on prototype testing and evaluation to refine the project for successful completion.