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P6; Activates Relationships Problem

Abeer MahmoudMember for 18 years 3 months
Created
11
5
0
Dear all;
My activities linked by FS; and when I made a schedule I find the following for example;

Activity #1; Start 1/01/2010 Finish 10/01/2010
Activity #2; Start 10/01/2010 Finish 15/01/2010
Activity #3; Start 15/01/2010 Finish 18/01/2010
I wonder why because the normal must be:
Activity #1; Start 1/01/2010 Finish 10/01/2010
Activity #2; Start 11/01/2010 Finish 16/01/2010
Activity #3; Start 17/01/2010 Finish 20/01/2010
I need to solve this problem by the default way, because I solved it by add a lag =1 and I think it is not practical for big projects so can anybody help me by steps.
Best Regards,
Abeer Taher

11 replies

Oldest first
  1. 0
    Alexandre Faulx-Briole ·
    Taher,
    Look at the project’s and activities’s calendar; you will certainly see that in the actvities’s calendar the day has fewer hours than in the project’s calendar; for instance 8 hours per day for the project and 7 hours per day for the activities
    Alexandre
  2. 0
    Dieter Wambach ·
    Taher

    In addition to what Alexandre wrote change your user preferences to show hours and minutes:
    Edit (in the menue) --> User Preferences --> Dates --> select show hours --> mark "Minutes". Then you’ll see the mismatch between calendar and your expectations.

    P6 internally calculates in hours independent from what is displayed.

    Regards
    Dieter
  3. 0
    Abeer Mahmoud ·
    Dear Alexandre/Dieter,
    Thanks for your fast replay I mad your steps and I found the following:
    Activity #1; Start 1/01/2010 8:00 Finish 10/01/2010 16:00 (calendar #A; 6 working days 8hrs/day)
    Activity #2; Start 10/01/2010 16:00 Finish 15/01/2010 16:00 (calendar #B; 7 working days 8hrs/day)
    Activity #3; Start 15/01/2010 Finish 18/01/2010 (calendar #A; 6 working days 8hrs/day)

    Well how I can solve this problem by default without need to show hours and minutes?
    Best Regards,
    Abeer
  4. 0
    Anoon Iimos ·
    use only one calendar
  5. 0
    Abeer Mahmoud ·
    use one calendar!!!! How come? It is not logic/applicable at all
  6. 0
    Dieter Wambach ·
    Hi Abeer

    What do you mean by "by default"? If you’ll work with days you must keep in mind that internally everything will be calculated in hours.
    Before you’ll show a report, change your references.

    Regards

    Dieter
  7. 0
    Abeer Mahmoud ·
    Hi Dieter,
    I agreed with you about user reference, but I mean I don’t want to face FS problem again in future and for the existing project how can I make
    Activity #2; Start 11/01/2010 08:00 Finish 16/01/2010 16:00 (calendar #B; 7 working days 8hrs/day)
    Instead of existing; Activity #2; Start 10/01/2010 16:00 Finish 15/01/2010 16:00 (calendar #B; 7 working days 8hrs/day)
    Thanks;
    Abeer
  8. 0
    Anoon Iimos ·
    Hi Abeer,

    Dieter is right, and I supposed the result of logic depends on how you had defined it.

    In your example, one of your activities has 5 days duration and uses a 7 day calendar, is there logic on it?

    In my opinion, it is logical to tailor your calendar(s) and resources to your activities (after all, you are assigning resources to activities and not otherwise).

    And by the way, use only FS
  9. 0
    Dieter Wambach ·
    Hi Abeer

    How are the working hours of the assigned calendar? If an activity is planned until the last minute of a day, the next one will start the first hour of the following day - some constellations with milestones can behave different.

    Do you have preferences equivalent to as follows?
    Assigned calendar activity 1: Working time 8am to 4pm, activity 2: from 9 am to 5 pm?

    Of course you can use different calendars within one project - e.g. Engineering 5d 8h, transport 7d 24h, site 6 d 10h with different holidays. But, to follow Anoon’s words, don’t exaggerate: P6 can deal, but you can’t trace.

    Regards

    Dieter
  10. 0
    Alexandre Faulx-Briole ·
    Taher,
    you should check the hourly detail of calendars A and B; you say that Activity # 1 starts on 8:00 AM and finishes 8 hours later at 4:00 PM: that means that this calendar does not take any lunch break into considertaion
    I suspect that either the project’s or the default calendar also has 8 hours per day, but with a lunch break, and the day finishes at 5:00PM
    therefore:
    - Activity A goes from Day 1 8:00AM to Day 10 at 4:00PM,
    - Activity B goes from Day 10 at 4:00PM to Day10 at 5:00PM, then starts its 1st complete day on Day 11 at 8:00AM
    Alexandre
  11. 0
    Abeer Mahmoud ·
    Thanks Alexander;
    It worked; I checked detailed work hours/day and made the following:
    • From (0) to (7) non work
    • From (8) to (15) work
    • From (16) to (23) non work
    I am very very happy
    Best Regards,
    Abeer

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