Project Planning and Critical Paths

Ages 16–18

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Project Planning and Critical Paths

A project network shows which tasks depend on others. The critical path is the longest chain of dependent tasks; delaying it delays the project unless the plan changes. Earliest and latest times reveal slack on non-critical tasks.

Your goals

  • ✓You can use durations, dependencies, schedules, and slack to plan work.
  • ✓You can use Project Planning and Critical Paths, model correctly.
  • ✓You can use the definitions, units, assumptions, and examples to check your answer.

Words to know

Project Planning and Critical Paths:
Use durations, dependencies, schedules, and slack to plan work.
model:
A rule or representation used to describe a situation and make a prediction.

Examples

  • 1If a project has paths of 12 days and 15 days, the earliest finish is 15 days before extra resources or overlap.
  • 2A task can have spare time without changing the final date, but only if it is not on the critical path.

Check these

  • • Do not skip the meaning of a term or give a result without explaining what it means.
  • • Keep every number, symbol, label, and unit in its correct place.
  • • Show enough working to check how you reached your answer.

Helpful habits

  • • Read the whole question before choosing what to do.
  • • Show one clear step at a time and check each step.
  • • If you are stuck, draw a model, try smaller numbers, or revisit the example.

Now try your own

Create your own project planning and critical paths example, solve it, and explain how you checked it.

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