Primavera Short Courses in Lahore
Do a quick Google search using the keywords <Change Primavera calendar>. This course is a beginner's course in Primavera P6. Those who want to learn P6 and understand its basics within a minimum time shall take this course. Primavera P6 Training Courses in Lahore. You will get a whole host of results showing how to use Primavera's fill functionality to change the activity calendar for all activities in a project.
Calendar in Primavera
Changing the activity calendar in Primavera can actually change the duration of activities. That's right, sometimes you even get partial or decimal durations where there were none before.
Primavera and modifying
I want to show you how to solve this problem by changing the calendar in Primavera and modifying the durations. In the following video tutorial, I will show an alternative to using Fill-Down, which allows you to change the activity calendar AND leave the durations unchanged.
The Primavera database
Let me first explain what this is all about. To do this, we must first understand how durations are stored in the Primavera database. Primavera P6 does not store durations in the Primavera database in days but in hours. So let's re-examine this situation clockwise. I have changed the duration to hours.
The duration
Here we see that the actual number of hours for this activity is 1280 hours, and I want to emphasize here that this value does not change when I change the calendar. Primavera does not change the duration of the activity for you when you change the calendar. So, what happens I'm going to show in this image.
The entire calendar
Let's say I want to change the entire calendar for this project to 12 hours, 6 days a week and I want the period to stay the same, so it doesn't change. Fortunately, we can use something called global shift. So, you can go here to the tool and go down and find that global change. Okay, now I've done a global shift from 8-hour calories to 12-hour calories. Let's take a look at that. It looks like this.
the calendar matches
It looks for activities where the calendar matches the old 8-hour, 5-day week, and then it performs a series of operations on those activities. It first updates the calendar to a 12-hour, 6-day week, which is done automatically, and then updates the original duration.
the PSP activity
Each duration is multiplied by half, that is, by 1.5, because a 12-hour day is 1.5 times longer than an 8-hour day. Now, when I make this global change, it gives some errors when updating the durations of some molars and effort levels, and the PSP activity summary does not work. So, if I run it in its current form, it fails.