Inside Out

Adjust PERT analysis weighting

Sometimes, the PERT analysis results appear to be skewed or exaggerated. You can adjust how Microsoft Project weights duration estimates for the PERT analysis. On the PERT Anal ysis toolbar, click Set PERT Weights. Change the number in at least two of the three fields— Optimistic, Expected, and Pessimistic—so that the sum of all three numbers equals six (see Figure 5-8). Then, enter the durations in the PERT Entry Sheet as described previously. Finally, click Calculate PERT.

Figure 5-8. Use the Set PERT Weights dialog box to change the weighting of optimistic, expected, and pessimistic durations for the PERT Analysis calculation.

By default, the PERT weights are 1-4-1; that is, heavily weighted toward the expected dura tion, and lightly and equally weighted for the pessimistic and optimistic durations. Although 1-4-1 is the standard PERT weighting, 1-3-2 can build in a little more pessimism for better risk management.

Tip Use your PERT analysis to check how you're progressing

A good use of the PERT analysis is for a quick check of how your project is going. Has your critical path or resource leveling pushed the project schedule beyond your worst-case PERT analysis? If so, it can tell you it's time to replan your project.

Project Management Made Easy

Project Management Made Easy

What you need to know about… Project Management Made Easy! Project management consists of more than just a large building project and can encompass small projects as well. No matter what the size of your project, you need to have some sort of project management. How you manage your project has everything to do with its outcome.

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