What is a critical path method (CPM) schedule and its relevance to PDD?

• A. A budget planning tool.
• B. A list of non-critical activities with no effect on duration.
• C. A risk assessment method.
• D. A schedule showing the sequence of critical activities that determine project duration, guiding planning and management.

Answer: (D)

A critical path method schedule identifies the sequence and duration of activities that determine the project’s total finish date, highlighting the tasks that cannot slip without delaying the project. In PDD, this matters because it translates design and documentation work into a timeline, helping you plan milestones (concept, schematic design, design development, construction documents, reviews), coordinate interdisciplinary efforts, and allocate resources effectively. It shows where there is no slack—where delays will push the overall completion—so you can focus on keeping those activities on track and use float on non-critical tasks to absorb delays. While budgeting and risk assessment are important, CPM is specifically about the timing and sequencing that set the project duration and guide ongoing planning and management.