Situation:
I have attached below a snap shot of the first page of a baseline schedule submitted by a contractor. A Quick glance while reviewing the schedule shows that they have used a calender having different working hours during various months based on Ramdan reduced work hours etc. The default calender assigned in the project level is the same.
A must finish by constraint is assigned on 31-Aug-14 at project level.
One of the activity as seen in this picture "Mobilization Works" has been given an original duration of 14.50 days.
There are milestones with invalid relationships as per scheduling report; probably due to assigning FS predecessor relationship to a Finish Milestone etc.
Questions:
Are there any reasons other than the above for having a project late finish date earlier than the project early finish date, ,having fractions in total float?
Is it required to impose a must finish by constraint before starting the update process?
John,
Dont put must finish constraint, check your relations also the calendar assignment.
Regards
Sunil.
Hi Charlie
Three things:
1. Welcome to Planning Planet
2. Next time place your topic in its own heading - not tucked under another.
3. Check your calendars.
Best regards
Mike Testro (Moderator)
Good day All,
I have a few issues which I need your assistance with please.....
1. I have a schedule consisting of about 3000 activities so it is quite an exercise to analyse when there are inconsistancies.
When I imported this program to P6 The start and finish dates don't quite match the baseline dates, the original durations don't match the remaining durations, (if the activity is compared to the baseline bar it's not the same and in a schedule with this many activities it has must have a significant impact)
I have done the exercise of aligning the durations and end up with a matching start and finish date to the baseline, but a negative lag of 25days.
When I hit the schedule button (F9) the the program finish date falls back and ends up with a positive float of 23 days.
How can it be different to the Baseline?
I have tried a number of angles to find out what is the problem, I have even Put a mandatory constraint on all activties so that float and variance all = 0, BL Start and finish = start nd finish and at the end of the program I still get some negative float and still end up with this negative 25 days float but all the dates are aligned with the baseline?
This programm was originally developed in MS project and imorted to p6. could this have something to do with it?
I don't know what to do next, pulling hair out now... ;-)
Not even sure my question makes sense at this stage.
Please any suggestions would be appreciated\
Thanks
Charlie
Dear Sir,
I am also suffering similar Problem.
Thanks Raymund and Pranab
Questions:
Are there any reasons other than the above for having a project late finish date earlier than the project early finish date, ,having fractions in total float?
Is it required to impose a must finish by constraint before starting the update process?
John,
There is issue on Time because duration are in fraction. Check the Dates Time.
Must Finish constraint shall be assigned as the Project Contract Completion Date during preparation of Baseline.
Hi John,
A SS relationship with the Start Milestone and FF milestone Would Finish the project ont he same time for both Early and Late dates. Otherwise the milestone would either move to the previous "minute" or the "minute" just after the project finishes.
regards
Pranab
Hi Kevin
Thanks for your reply.
As I Know, A Finish Milestone has only a Finish Date and cannot start; assigning a predecessor FS means the finish milestone is supposed to start after the predecessor is finished. A FF or SF relationship is always logical for a Finish milestone.
I removed the fraction in the duration of the actvity mobilization and made it 14 d instead of 14.5 d, this removed the fraction in float.
When i removed the must finish by constraint, the negative float also disappeared; probably because the project must finish by constraint should have been set on 01-Sep-2013, one day after the planned finish date. This is a change noticed from P3 to P6. P3 used to accept the same dates for project finish and must finish by constraint.
Hi John
Firstly I'm pretty sure you CAN have FS logic with a finish milestone.
You do ideally have a finish constraint on the last activity or the project so that this will drive the float to a required completion date.
The "late finish date earlier than the project early finish date" is being driven by the logic I would assume, you need to review the longest path. Fractions in the total float is only due to the format of the time units!
My worry would be that they have issued a plan that has negative float?? Which is saying that they don't think they can finish on time albeit only a few hours late!! I'd like to see some float in my programmes!!
Kevin