A good methodology to apply regarding Constrains?
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Hello Mike,
Would you be so kind to explain to me what you meant by “fill the gap with activity bars that bars that fix a start date.”
This is my understanding of what you said “Go to the bar setting and create a bar for Constraints Dates. Next create a UDF with the dates of the constraints. Have the bar show the Constraints Date information on the right side of it and color it as bright as the Sun.”
I really hope this what you were trying to tell me otherwise am a big Dodo Bird.
JoseR
Hi Jose
It is very simple.
For every start constraint there must be a reason why it is there.
Maybe procurement or some sort of outside influence such as Local Planning.
If you do not know why the restraint is set when it is then put in a task bar from the most likely start point - even day 1 will do - and make the duration end at the constraint day - then set FS links to the restrained task.
Name the task something like "Unkown Late Start" and if you like colour it bright scarlet.
Better still work out for yourself why the consraint has been set in place and redraw the programme.
I hope that helps.
Best regards
Mike Testro
Thank you Mike, for making this clear, I totally understand now.
Jose,
I would be tempted to follow last advice by Mike Testro: "strip them all out and start again".
By the statistics on your schedule report this is not a CPM schedule and logic, if any logic, it must be wrong.
Although I never say never, I have never used negative lag, over a hundred activities just makes no sense as well as the amount of open ended activities, this is more like the Bar Charting with a few relationships some MS Project schedulers do. One of the not uncommon relationships I have seen done by MS Project schedulers is to tie two activities with a FS relationship with negative lag as to mimic laddering or overlap of activities, this because MS Project only allows for a single tie between two activities. This approach prevent open ended activities, other MS Project schedules frequently follow the other option, to tie activities by a SS and positive lag relationship and leaving open the end of the intermediate activities.
Some MS Project schedulers believe that they are creating true CPM logic by moving activities and forcing the software to hold it by automatically inserting constraints on start and or finish date. If the schedule was created at a design office there is a possibility it was created in MS Project and then transferred to P6.
Kind of profiling, yes it is.
Best regards,
Rafael
Hi Jose.
The only way to deal with this is - as you have already stated - to remove all constraints and lead lags and fill the gaps with activity bars that fix a start date.
I do use ALAP for design and procurement tasks linked to the 1st activity that requires the input.
Also if you are creating a "window" for other trades to occupy between a ASAP task and an ALAP task.
Otherwise strip them all out and start again.
Best regards
Mike Testro.
Hello Rafael and Mike,
Thank you, for your advise.
Rafael, yes the schedule was created with MS Project by the folks at MAN Diesel (Some German Co.?) and I was the silly one to imported it into P6.
I new that this schedule was not good, no wonder i got 53 pages of issues when I executed the Schedule Val. Report via Pertmaster.
I was trying to tell my boss that we require more then two days to fix all of these issues because he wanted to have this schedule corrected and resource/cost by Monday (Tomorrow). Oh, boy.
The Other Issues are that the task names are really weirdly name: (i.e. by parts names or statements no where close to how I normal name a task (i.e. Firehouse: Install Rebar). So, reading the schedule to know what we are doing is a bit tricky because I really dont know what they mean by Install Fire House?. I guess someone is delivering a Fire House that day to be installed. Lol.
Well, Thanks again Mike and Rafael for all your time and help.
JoseR