The way P6 calculates durations for summary groups is dependent upon the calendars being used by the actviities within the group.
If all activiites use the same calendar, that calendar is used for the summary group. If the activities contain a mix of different calendars, then the Project Default calendar (set at the project level) is used to determien the duration.
The above is from P6 R6.3 onwards, prior to this, only the Global Deflault calendar was used to calculated summary durations.
The other consideration is the way P6 calculates "Original Duration" is based on Planned dates, that are another set of dates within each project. I Personally prefer to display the following:
Actual Duration
Remaining Duration
At Completion Duration (Which is always Actual + Remaining)
(and if I want to show baselines) BL Project Actual duration and BL Project Remainig Duration
Calendar Days do not necessarily mean working days, unless you are scheduling 24/7/365. Durations based from calendars will always consider non-working days, in order to come out with accurate dates. So for example: A scheduled 6-day activity, may actually have a calendar duration of 8 days, considering you have defined Saturday and Sunday as non-working days.
Member for
20 years 6 monthsThe way P6 calculates
The way P6 calculates durations for summary groups is dependent upon the calendars being used by the actviities within the group.
If all activiites use the same calendar, that calendar is used for the summary group. If the activities contain a mix of different calendars, then the Project Default calendar (set at the project level) is used to determien the duration.
The above is from P6 R6.3 onwards, prior to this, only the Global Deflault calendar was used to calculated summary durations.
The other consideration is the way P6 calculates "Original Duration" is based on Planned dates, that are another set of dates within each project. I Personally prefer to display the following:
Member for
19 years 1 monthCalendar Days do not
Calendar Days do not necessarily mean working days, unless you are scheduling 24/7/365. Durations based from calendars will always consider non-working days, in order to come out with accurate dates. So for example: A scheduled 6-day activity, may actually have a calendar duration of 8 days, considering you have defined Saturday and Sunday as non-working days.