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6 - PROJECT TIME MANAGEMENT

6.5.3 Estimate Activity durations: outputs

6.5.3.1 Activity duration Estimates

Activity duration estimates are quantitative assessments of the likely number of time periods that are required
to complete an activity. Duration estimates do not include any lags as described in Section 6.3.2.3. Activity duration
estimates may include some indication of the range of possible results. For example:

• 2 weeks ± 2 days, which indicates that the activity will take at least eight days and not more than twelve
(assuming a five-day workweek); and

• 15 % probability of exceeding three weeks, which indicates a high probability—85 %—that the activity
will take three weeks or less.

6.5.3.2 Project documents updates

Project documents that may be updated include, but are not limited to:

• Activity attributes; and

• Assumptions made in developing the activity duration estimate, such as skill levels and availability,
as well as a basis of estimates for durations.

6.6 develop Schedule

Develop Schedule is the process of analyzing activity sequences, durations, resource requirements, and
schedule constraints to create the project schedule model. The key benefit of this process is that by entering
schedule activities, durations, resources, resource availabilities, and logical relationships into the scheduling tool, it
generates a schedule model with planned dates for completing project activities. The inputs, tools and techniques,
and outputs of this process are depicted in Figure 6-16. Figure 6-17 depicts the data flow diagram of the process.

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