medium · Project Management Professional predictive

A critical path at Kestrel Civic has three activities. A: σ^2=1, B: σ^2=4, C: σ^2=4. The project manager is asked to reduce path uncertainty.

Which activity's variance reduction would have the greatest impact on σ_path?

  1. The activity with the longest expected duration, regardless of its variance.
  2. Activity A, because its variance is already the lowest.
  3. Activities B or C, because they contribute more to the sum of variances.
  4. All activities have an equal impact because standard deviations are additive.

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