Primavera P6 Duration Types
Primavera P6 Duration Types

Oracle Primavera P6 Duration Types Explained

Oracle Primavera P6 duration types have affects on activity duration, resource and cost distribution when progressing the schedule. Activity durations control the critical path and the comletion date of a project. Activity duration type also affects the activity remaining duration and completion date when progressing the schedule with updates.


Before to start creating a work schedule , it is a good idea to decide the activity duration types and their effects on the work schedule. Basically four duration types are available in Oracle Primavera P6. Choosing the most suitable duration type is based on your project requirements, projects type and tracking method. In this article we will review the Oracle Primavera P6 duration types and their effects considering the physical percent complete type.

Oracle Primavera P6 Duration Types

Duration types are used to estimate the activity completion type in P6. Resource availability, costs and deadlines are important factors for selecting the duration types. Duration type applies only when you have resources assigned to the activity. Below are the duration types of P6.

  • Fixed Duration & Units/Time or Fixed Duration & Units
  • Fixed Units/Time
  • Fixed Units

How to Use Oracle Primavera P6 Duration Types ?




The figure below (Figure 1) shows a sample project. As shown in the figure three welding activities are in parallel and the percent complete type is “Physical”. They will be performed in three different locations but at the same time.

Figure 1 Sample Project
Figure 1 Sample Project- P6 Duration Types

In order to analyze the effect of different duration types, select the duration type of each activity as below, Figure 2.

Figure 2 Duration Types
Figure 2 Duration Types-  P6 Duration Types

Let’s assume that Budgeted labor unit of each activity is 1000 Manhour.

Fixed Duration and Units/Time

Resource quantities does not effect the activity completion time because the activity duration is fixed. Let’s assume that the Activity A1040 Welding Between KP 50 – KP 100 started on 18-May-18 and %80 of it is completed physically. Remaining duration of the activity is 25 days. When we enter the remaining duration we see that the actual and the remaining labor unit is 500 Manhour as shown in the Figure 3.

Figure 3 Fixed Duration and Units Time
Figure 3 Fixed Duration and Units Time- P6 Duration Types

We want P6 to calculate that the actual unit is %80 of 1000 Manhour because %80 of work has been completed. Therefore we entered 800 Actual Manhour and saw that the At Completion Units become 1300 Manhour as shown in the Figure 4.

Figure 4 Fixed Duration and Units Time Change
Figure 4 Fixed Duration and Units Time Change-Oracle Primavera P6 Duration Types

In the Fixed Duration and Units/Time duration type, remaining units and remaining units/time remain constant. At completion units and costs increases as the actual units increase because the units are not fixed.

Fixed Duration and Units

Resource Levelling Feature of Primavera P6

We assume that the Activity A1050 Welding Between KP 100 – KP 150 started on 18-May-18 and %80 of it is completed physically. Remaining duration of the activity is 25 days. When we enter the remaining duration we see that the actual and the remaining labor unit is 500 Manhour in the Figure 5.

Figure 5 Fixed Duration and Units
Figure 5 Fixed Duration and Units-Oracle Primavera P6 Duration Types

We entered 800 Actual Manhour and saw that the At Completion Units didn’t change. Only the Remaining Units has changed as shown in the Figure 6.

Figure 6 Fixed Duration and Units Changes
Figure 6 Fixed Duration and Units Changes-Primavera P6 Duration Types

In the Fixed Duration and Units duration type, remaining units and remaining units/time remain changes. At completion units and costs remain constant as the actual units increase because the units are fixed.

Fixed Units




The budgeted unit (or budgeted cost) is a limiting factor in this duration type. We assume that the Activity A1050 Welding Between KP 0 – KP 50 started on 18-May-18 and %80 of it is completed physically. Remaining duration of the activity is 25 days. When we enter the remaining duration we see that the actual and the remaining labor unit didn’t change as shown in the Figure 7.

Figure 7 Fixed Unit
Figure 7 Fixed Unit-Oracle Primavera P6 Duration Types

We entered 800 Actual Manhour and saw that the Remaining Units and At Completion Units didn’t change. Only the Remaining Units/Time has changed but the activity duration is compressed as shown in the Figure 8.

Figure 8 Activity Duration
Figure 8 Activity Duration-Oracle Primavera P6 Duration Types

Activity duration changes when you update the work schedule.

Updating the Schedule

The figure below (Figure 9) shows the updated workschedule after moving the data date forward 70 days and recalculating the schedule.

Figure 9 Remaining Durations
Figure 9 Remaining Durations-Oracle Primavera P6 Duration Types

As shown on the figure, the remaining duration of the activities (A1040, A1050) with fixed durations didn’t change. The remaining duration of the activity A1060 has changed.

Summary




Oracle Primavera P6 duration types determines the activity completion time and activity completion time effects the project duration. It determines whether the schedule, resource availability, or costs are most important when updating activities. The duration type applies only when you have resources assigned to the activity [1]. If the duration type is not properly set, undesired effects and problems will occur during the updating phase. Fixed duration and units is the most common duration type for progressing the schedule. Other duration types can also be used based on your project requirements.

References 

[1] docs.oracle.com

See Also

Primavera P6 Download Free Trial Version

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