primavera duration

7/28/2019 Primavera Duration

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1- Duration % complete:Duration % of Original (or Planned) threshold value is expressed as a percentage. An issue is generated if the ratio of the activitys

actual duration to its original or planned duration (actual duration / original or planned duration * 100) falls beyond the threshold values.

How it is calculated inprimaverap6 : Duration percent Complete(P6) = ( [Original Duration] [Remaining Duration] ) / [Original

Duration]

Example of calculating Duration % Complete : Original Duration: 20d , Actual Duration: 15d and Remaining Duration: 18d [Duration

% Complete] = (20-18)/20 = 10%

to use the Duration % complete for an activity you should select the Duration % complete type from the activity details general tap as

shown in the photo below

Duration percent completeprimavera p6

Duration percent Complete for WBS Elements

The previous explanation was focused on Duration % Complete for Activities. Duration % Complete is also calculated for WBS Elements,

but I strongly recommend you not to use Duration % Complete to track a WBS Elements progress. Thus I have not included an

explanation of the calculations here.

2- Units % complete:Each assigned resource and assigned expense creates units inPrimavera P6. The number of units depend on duration of the activity and

your current settings the Units % is calculated from the actual and remaining units, Units % Complete = [Actual Units / At Completion

Units] x 100. see the figure below for more understanding

unitspercent completeprimavera p6
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Units % Complete for WBS Elements

The previous explanations were for activities Units % Complete. This field is calculated in the same way for WBS Elements. However, I

recommend you to useEarned Valueand Performance % Complete for the WBS Elements instead of Units % Complete and Duration %

Complete.

Different between Duration % complete and Units %

Complete:

- When units are not distributed uniformly, the Units % Complete will not be uniform relative to thetimeand will not equal to duration

percentage complete.

- Even if the units are distributed uniformly and the original duration not equal to at completion duration the units percentage complete

will not equal to duration percentage complete.

- Only when units are distributed uniformly and the original duration equal to at completion duration the units percentage complete will

equal to duration percentage complete.

3- Physical % complete:Physical percentage complete is a calculated field, which displays the percent complete based on the relative weights of the completed

steps versus the incomplete steps. The physical progress of an activity is a manually-entered value determined by the user.

The Physical % Complete is not rolled-up to WBS level, because its based on an external parameters, unknown to the software.

to use the Physical % complete for an activity you should select the Physical % complete type from the activity details general tap as

shown in the photo below

Physical percent completeprimavera p6

4- Schedule % complete:schedule percent complete for an activity based on a straight forward calculation in primavera p6, schedule percent complete = ( [Data

Date] [Baseline Start] ) / ( [Baseline Finish] [Baseline Start] )
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When the Data Date is earlier than the Baseline Start date, Schedule % Complete is zero, when its after the Baseline Finish data,

Schedule % Complete is 100%. Otherwise, Schedule % Complete show what percentage of the Baseline duration is passed by the Data

Date. see the figure below for better understanding.

Schedule percent complete primavera p6

Schedule % Complete for WBS Elements:

The Schedule % Complete of the WBS Element will be the ratio of the Baseline Costs before the Data Date to the Total Baseline Cost.

The costs before the Data Date are called the Planned Value, or PV for short (Also called BCWS Budgeted Cost of Work Scheduled).

The total baseline cost is called Budget At Completion or BAC for short. We can now formulate the calculation of Schedule % Complete

for WBS Elements as: Schedule % Completed (WBS) = PV / BAC

5-Performance % Complete:The percentage presentation of EV is usually called Performance % Complete. Performance % Complete of the Activities under the same

WBS Element is calculated by one of these six options:

1. By Activity % Complete and without resource curves

2. By Activity % Complete and with resource curves

3. By WBS Milestones

4. By 0/100 method

5. By 50/50 method

6. By x/(100-x) custom method

(1) and (2) are continuous and the rest of them are milestone progresses. (1) and (2) are dependent on the Activity

progress, (3) is completely independent from the Activity progress, and the rest of them are only influenced by Actual Start

and Actual Finish of the Activities.
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