If there is delay in the activity progress, then the actual duration column in MSP shows only the duration the activity actually progressed. Result: When there is no delay in the activity/task, both MSP and P6 give almost the same value output for the actual duration and the percent complete. P6 almost gives the same output with a different formula: Duration % Complete = (Planned - Remaining)/Planned Duration * 100% = (20-10)/20 * 100% = 50%. Please refer to the activity "guard House1" in the below screenshots. This is based on formula % Complete = (Actual Duration/Duration) * 100% = (10/20) * 100% = 50%. For example, for a 20 days activity, if we enter the percent complete as 50%, then the actual duration gets calculated as 10 days and the remaining duration gets calculated as 10 days. In MSP, we manually enter the "% Complete" field for tasks and the actual duration gets calculated based on the percentage entered. In Primavera P6, we set the data date to a specific date up to which the schedule progress has to be updated which is similar to the status date in Microsoft Project. Is it possible that Primavera calculates Duration values in a different manner? Just a thought. And after rescheduling the incomplete work from the past into the future, the Duration of this task is still 18 working days, as it does not consider the nonworking time, such as weekends and the task split. The Actual Duration of 10 days does exactly correspond to the number of working days shown by the progress line in the Gantt bar for this task. 
In Microsoft Project, Duration is always calculated in working days, according to your Project Calendar.
#Microsoft project vs primavera p6 software#
Since I do not have Primavera, I cannot speculate on why that tool calculates different numbers than you see in Microsoft Project, however, I would ask you to consider that perhaps the two software applications handle both Duration and progress calculations differently. The Duration remains at 18 days, and the Finish Variance is 12 days.
I rescheduled the incomplete work from the past (prior to October 8) into the future (after October 8). Microsoft Project DID calculate the Actual Duration as 10 days.ģ. In manually entered 56% in the % Complete field for this task. I set the Status date for the project as October 8th.Ģ. I am not sure exactly how you enter task status in your projects.
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