Correct procedure for revision program

There are very few instances of Projects being rescheduled in their entire life cycle.

When the gap between actual & planned is too high, you go for rescheduling with the same end date or showing a delay agreed by the Client. In this scenario you have to undertake an exercise of rescheduling. Need not be the base plan. you can freeze the current plan & categorise it as a new baseline. & then reschedule realistically.

Average O&G Projects do not undergo so many revisions in its entire lifecycle, i mean; individual phases, FEED/EPC etc. If a Project phase has too many revisions in plan, then its fits into the scenario of mismanaged projects.



Cheers

Dattatreya

Sreekanth



I agree with your friend,when revising a programme you should put the actuals & reschedule it and then use that same data date in revising and/or resequencing your programme. From my point of view, you cannot provide a comprehensive forecast without considering what had happened...

Argument: “it need to revise on previous revision with new ES & EF dates matching the actual update dates”



Scenario : Project of 2 year duration. Schedule of 7000 activities. Schedule to be revised (1st revision) after elapse of 1 year of project duration. 4000 activities having % complete more than 0.



How you are going to do it,



1: Activity A1 assign relations give duration and schedule it (With start date as data date since revision with 0% progress). ES & EF of this activity matches with the actuals. Good.



2: Activity A2 assign relations give duration and schedule it. ES & EF of this activity matches with the actuals. Very Good.



3: Activity A3 assign relations give duration and schedule it. ES & EF of this activity also matches with the actuals. Great.



4: Activity A4 assign relations give duration and schedule it. ES & EF of this activity also matches with the actuals. OOPs but ES & EF of A2 do not match with its actual.



Change the relations and duration of A2 and run the schedule. Eureka….ES & EF of A2 matches with the actuals. Let us proceed …but wait…. now ES & EF of A1 is not matching with its actuals.



So modify the relation of A1 ….no modify the relation and duration of A2……lets check…..



Result: After 2 years project completed and handed over….site demobilized…..but the great planner still revising the program to match ES and EF of all activities with its actual.

Not only the actual dates have to be matched, you should look at the S-curve & match the overall & individual curves so that it matches the actuals. I.e Planned progress as of date for the baseline is equal to the actual progress of the updated ones.



Cheers



Dattatreya

I agree with you.