How to Change 5 Day Workweek to 7 Day Workweek calendar but keep Project Finish Date unchanged in Primavera P6

After 3 months of hard working, we finish a schedule with 5 Day Workweek calendar like picture:

Change 5 Day Workweek to 7 Day Workweek but keep Project Finish Date unchanged in Primavera P6-1

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:

Change 5 Day Workweek to 7 Day Workweek but keep Project Finish Date unchanged in Primavera P6-2

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

Change 5 Day Workweek to 7 Day Workweek but keep Project Finish Date unchanged in Primavera P6-8

Step 2 : Go to menu Tool -> Global Change.

Create a Change “SaveTo5DW” with detail like below picture:

Change 5 Day Workweek to 7 Day Workweek but keep Project Finish Date unchanged in Primavera P6-9

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.

Change 5 Day Workweek to 7 Day Workweek but keep Project Finish Date unchanged in Primavera P6-5

Step 4 : Go to menu Tool -> Global Change.

Create a Change “LoadFrom5DW” with detail like below picture:

Change 5 Day Workweek to 7 Day Workweek but keep Project Finish Date unchanged in Primavera P6-10

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

Change 5 Day Workweek to 7 Day Workweek but keep Project Finish Date unchanged in Primavera P6-11

 

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Author: Khuong Do

Khuong Do is a Project Planner in Civil, Transportation and Oil & Gas Industry. He has worked as a Primavera Consultant Specialist since 2006 . He holds a Civil Engineering degree and a Bachelor of Information Management System. Now he is working in Petronas RAPID project, one of the biggest Refinery and Petrochemical complex, in Pengerang – Malaysia.

2 thoughts on “How to Change 5 Day Workweek to 7 Day Workweek calendar but keep Project Finish Date unchanged in Primavera P6”

  1. 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.

    Like

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