Project Planning and Control Using Primavera Contractor Version 6: Including Versions 4.1, 5.0 and 6.1

15.1: Understanding Date Fields

15.1 Understanding Date Fields

Primavera Contractor has many more date fields for the current schedule than P3, SureTrak or Microsoft Project. This section explains how these date fields calculate.

There is very little documentation available on how these dates are calculated and the author has ascertained the information following by trial using an unresourced schedule.

After you understand these fields, you should look again at the Bar Timescale options in the Bars form. It will be easier to understand how the bar formatting works.

  • Early Start and Early Finish

These are always the earliest dates that unstarted activities or the incomplete portions of in-progress activities may start or finish based on calendars, relationships and constraints.

  • Early Start is set to the Data Date after an activity has commenced.

  • The Early Finish is set to the Data Date when the activity is complete.

Note

Other software sets the Early Dates to the Actual Dates after an activity has commenced or has been completed. This is the reason why the Early Bar is not displayed by default in the Gantt Chart, as the Early Bar will not display Actual progress in the same way as other software.

  • Late Start and Late Finish

The latest dates that unstarted activities or the incomplete portions of in-progress activities may start or finish based on calendars, relationships and constraints.

  • Actual Start and Finish

These dates are manually applied, representing when an activity started or finished, and...

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