Before you start: Understand dependencies, durations and resource constraints.

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A dependency-only schedule finishes in 12 days. Two parallel critical activities need the same unavailable specialist. Is 12 days still a reliable commitment?

Your reasoning, assumptions and units:

Apply it to your work

Describe a comparable situation. What evidence would you need before using this reasoning to make a decision?

Your example and next check:

Answer and reasoning

No. The network calculation assumes sufficient resources. Apply the actual availability constraints and reassess the schedule; resource levelling may extend the finish date.

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