Skip to content
ProjectControls.com
Planning, Scheduling & Programming Discussion

Why P3 Calculate backwards?

In the Open Standard
Angel CruzMember for 16 years 5 months
Created
6
3
0
I encounter some difficulties on my P3 Schedule. P3 calculates backward in some of my the activities. On my Project Overview : Project start on 08FEB10 and Project must finish on 17AUG13.

For example I have an activity having duration of 10 days without any predecessor and succesor. So, P3 usually gives ES 08FEB10 EF 17FEB10, but on my file P3 gives ES 08AUG13 EF 17AUG13.

Is there any problems with my setting?
Why P3 calculate backwards?
How to correct this kind of activities?

Tnx.


Angel

Save Follow Follow forum Report
Reply New topic

6 replies

Oldest first
  1. 0
    Vladimir Liberzon ·
    #1
    Activity may be of ALAP (As Late As Possible) type.
    And the schedule may be calculated backward - check scheuling settings.
    Report
  2. 0
    Shah. HB ·
    #2
    Hi Cruz

    It is due to the constraints which shows finish date earlier than start date

    I have experianced the same and even the similar topic have been discussed in this forum.You could refer for your reference
    Report
  3. 0
    Angel Cruz ·
    #3
    Hi Shahul,

    But the activity having no succesor, predecessor and constraint.

    Could you please direct me to the similar topic you’ve said. I search the forum but didn’t find it.


    Tnx in Advance.
    Report
  4. 0
    Vex Zex ·
    #4
    hi shahul,

    just set the start date at project overview,
    Then schedule..level...
    U can get what u want
    Report
  5. 0
    Rodel Marasigan ·
    #5
    Angel,
    Can you check if it has Float constrain. Zero free float have that attitude same as As Late as Possible.
    Report
  6. 0
    Angel Cruz ·
    #6
    Yup your correct, there is Float Constraint-Zero Free Float..ALAP

    Tnx.
    Report

Log in or join to reply

ProjectControls.com is free to join. Members can post questions, reply, vote and follow discussions.

Log inJoin free

Existing members: your original username and password still work. Forgot password?