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Schedule Network Analysis

A method that examines the schedule network to calculate the earliest and latest possible start and finish times for the remaining parts of project activities.

Key Points

  • Uses the schedule network diagram with activity durations and dependencies as inputs.
  • Applies forward and backward passes to compute ES, EF, LS, LF, and float.
  • Reveals the critical path and where schedule flexibility exists.
  • Repeated as the schedule is updated at the data date to reflect progress and changes.

Example

In a construction project, the scheduler updates actuals and then runs schedule network analysis. The forward and backward passes show that inspections are on the critical path with zero float, while interior painting has 2 days of total float. The project manager reallocates crew members to critical activities to protect the completion date.

PMP Example Question

Which technique examines the schedule network to determine early and late start/finish dates and identify schedule flexibility?

  1. Resource smoothing
  2. Schedule network analysis
  3. Rolling wave planning
  4. Monte Carlo simulation

Correct Answer: B — Schedule network analysis

Explanation: Schedule network analysis uses forward and backward passes on the network to calculate ES, EF, LS, LF, and float, highlighting the critical path. The other options do not compute these dates.

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