Forum Sponsor:

An innovation in P6 Professional training from RPCuk in partnership with Oracle. All the topics that matter to you in workshops customised to your role and industry.  Now get superior training value when you book our Blended Learning Bundle. Learn more here.

Viewer for .xer, xml and xls schedule files Schedule Reader™Free Trial

Tips on using this forum..

(1) Explain your problem, don't simply post "This isn't working". What were you doing when you faced the problem? What have you tried to resolve - did you look for a solution using "Search" ? Has it happened just once or several times?

(2) It's also good to get feedback when a solution is found, return to the original post to explain how it was resolved so that more people can also use the results.

Updating the schedule (Actual Date > Data Date)

3 replies [Last post]
Fernando Tubiao
User offline. Last seen 48 weeks 21 hours ago. Offline
Joined: 11 Oct 2009
Posts: 25
Groups: None

I would like to ask the experienced guys in P6 if you "actualize" your dates for those activities that have already started (or completed) and whose start or finish dates are after the data date.

For example, let's say your data date is April 30, 2013. Now you are collecting the information to update your schedule for the month of May. The planned start date for Activity "A" was May 15 and the finish date is June 15. It actually started on May 17, and the finish date now is June 17. Before you shift the data date, do you "actualize" the start date of the activity or do you do this AFTER you shift the data date? Actually, I have recorded the start date of that activity as an actual start date (May 17), without shifting the data date to May 31 yet, and the software is doing "weird" things with my activities, especially those that are linked to that activiy. One of the "weird" things that I have seen is that once I record the actual start date, the start date is set equal to the data date. Why?

How do you update you dates in P6? BEFORE or AFTER you shif your data date?



User offline. Last seen 27 weeks 3 days ago. Offline
Joined: 29 Mar 2010
Posts: 11

Firstly you have to be very clear about the definition of the term data date; The definition of a data date is the first available hour for new work to commence or existing work to continue. For eg: If your status is current as of Thursday at 16:00 (end of working hours), then a data date of Friday at 08:00 (start of working hours) might be appropriate. HENCE ALL YOUR ACTUALS AND PAST RECORDS WILL BE ON THE LEFT OF DATA DATE AND FUTURE PLAN ON RIGHT.

When we first prepare a schedule, the start date of the first activity will be same as data date.
Further, for all future schedule updates the remaining early start and finish dates will be scheduled from the current data dates as per the logical relationships. (if any activity was planned to start prior to the current data date and did not actually start, primavera will re-schedule the new start date of the activity from the current data date)

Also note that if an activity has an actual start, % progress and remaining duration left and has some logical relationship SS+lag , FF+lag which drives the remaining early start or finish; you will see that the remaining early start or finish will be driven by the predecessor relation ship away from the data date.

Answering your queries:

a) "Before you shift the data date, do you "actualize" the start date of the activity or do you do this AFTER you shift the data date? "

Always enter your (actual dates, % complete or remaining duration as the case may be or both depending on the type of activity % complete set) prior to pressing F9 or scheduling which will shift the data date

b) How do you update you dates in P6? BEFORE or AFTER you shift your data date?

I hope the above clarifies your queries. (Update your progress and then shift the data date by pressing F9 or tools->Schedule)

In Principle all your progress is recorded before data date and then the"remaining start/finish dates of partially completed activities + early start dates of not started activities are scheduled"

Raul Santos
User offline. Last seen 48 weeks 2 days ago. Offline
Joined: 29 Oct 2009
Posts: 44
Groups: None

Hi Gary,


Thanks for taking the time to answer my question. I put an actual on the Start date of the activity. I recorded it as May 17. Bear in mind that the data date is still April 30th. After doing this, recording the start date as an actual to May 17th, the beginning of the bar for this activity moves to April 30th as well. I have heard that it is not a good practice to put actuals after the data date (Actual Dates, either start or finish, > Data Dates, is not a good practice). However, I couldn't find this "best practice" in the documentation of P6.


Any other idea as to why this might be happening? or should I move the data date to May 31 and then record the actual start date to May 17?



Gary Whitehead
User offline. Last seen 15 weeks 6 days ago. Offline

I update my actuals before setting the new data date, and don't get any "weird" results when doing so.


"once I record the actual start date, the start date is set equal to the data date. Why?"

-Which start date field is being set equal to the data date? (actual start, early start, remaining early start, planned start, etc)


Other than this, what other "wierd" things are you seing?