After 3 months of hard working, we finish a schedule with 5 Day Workweek calendar like picture:
Then the Construction team said that “06-Mar-18 is the right Project finish date, but we’re talking about 7 Day Workweek, not 5 Day Workweek. Sorry pal, it must be a misunderstanding.”
What the he**?
Changing Activity calendar will change everything.
Normally, if we change calendar to 7 Day Workweek, all activity finish date will change like below picture:
Now Project finish date is 25-Jan-18.
I will show you How to Change 5 Day Workweek to 7 Day Workweek but keep Project Finish Date unchanged.
Step 1 : Go to menu Enterprise -> User Defined Fields
Create a field called “Finish 5DW” with Data Type : Finish Date. And “Start 5DW” with Data Type : Start Date
Step 2 : Go to menu Tool -> Global Change.
Create a Change “SaveTo5DW” with detail like below picture:
Click “Change” button to copy value to “Start 5DW” and “Finish 5DW” UDF.
Step 3 : Change Activity calendar to 7 Day Workweek.
You can change calendar for the first activity then use Fill Down function to apply for the rest.
Step 4 : Go to menu Tool -> Global Change.
Create a Change “LoadFrom5DW” with detail like below picture:
Click “Change” button to copy value to Start and Finish date .
Now we can see all activity Start and Finish date doesn’t change, only the Activity Duration change. Project finish Date is still 06-Mar-18
Khuong Do Blog 
Hi Khuong Do,
Very interesting and easy method for changing the 5D Calendar to 7D Calendar without changing the finish date of the project. I followed the same as you have shown. It worked exactly as described by you, but unfortunately at the end when i schedule the programme it will change the completion date of the Project and it is neither matching with the 5D Calendar nor with the 7D Calendar. Please confirm that weather I am missing something or really it happens.
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Hi.
Could you check:
1) Does your project have Actual data? Or it is an As-Planned schedule?
2) Do you use relationship lag?
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Hi Mr Khuong Do,
Thank you for your website,
Could you help me Sir,
how to create/show in primavera P6 progress last week?
for example my progress this week is 15%, and progress last week is 10%.
I want to show the progress last week & progress this week in primavera.
Thank a lot Sir,
Ranto
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Mr. Khuong Do,
I have a Project that is using multiple schedules. I have the start time and finish time the same for all calendars to reduce any time issues I might encounter. Unfortunately, I have a start time displayed on several activities that is what the prior calendar indicated. The first activity has a predecessor that has been actualized and ends at 5pm. The calendar is set for 7am start, 5pm finish. The activity is starting at 8am. I cannot manually change this time to 7am without a constraint, and even with a Start On constraint it continues to show 8am. The Admin preferences are set at “Use assigned calendar to specify the number of work hours for each time period”. I’ve scheduled the Project several times. I’ve F5 refreshed several times. Nothing. The time will not start on the selected calendar start time. Am I missing something?
Thanks
Alex
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