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332 Part 4: Updating and Managing the Schedule

How Data Is Summarized

You can summarize data for all projects in the EPS. Summary information is calculated and displayed for costs and quantities, custom user fields, dates, durations, float, progress, baselines, variances, and special cases for activity, resource, and cost data. The following paragraphs explain how the module summarizes specific data.

Costs and quantities Cost and quantity data items, such as budgeted cost and budgeted quantity, are totaled by adding the values for each activity in the summary.

User-defined fields User-defined fields are summarized according to type. For example, items representing start dates show the earliest start date, and items for finish dates show the latest finish dates. A numeric user-defined field is totaled for the summarized activities. A text-based user-defined field displays a blank unless values for all activities are the same.

Dates If you display early dates, the earliest early (or actual) start date and the latest early (or actual) finish date are shown. The same rules apply for late dates and baseline early and late dates.

Durations Original and remaining duration values are summarized. For activities with no progress, the original and remaining durations are the number of workperiods between the earliest early start and the latest early finish dates.

If the summary activity has an actual start date, original duration is calculated from the actual start date to the latest early finish date; the remaining duration is calculated from the “internal” early start date to the latest early finish date.

(The module keeps track of the early start date for each activity, even when you assign an actual start date; this is referred to as the “internal” early start date of the remaining duration.)

If the summary activity is 100 percent complete, original duration is calculated as the difference between the actual start date and the actual finish date; the remaining duration is zero.

Primavera - Project Management

Summarizing Projects 333

Float You can base total float of the summarized data on the start dates, finish dates, or most critical dates. To set this option, choose Tools, Schedule, Options. On the General tab, select how you want to calculate total float in the Compute Total Float As field. On the Advanced tab, choose how you want to calculate multiple float paths.

Progress The simplest measure of percent complete uses duration to compare the amount of time remaining to complete the activities to their original duration. In this case, the following ratio is used for each group:

[(Summary Current Original Duration – Summary Remaining Duration) / Summary Current Original Duration] x 100

Baseline data, comparison data, and variances You classify each baseline, comparison, or variance data item as either a date or a duration data item. See the “Datesand Durationssections on the previous page.

Primavera - Project Management