LOEs flag all member activities as critical?
In the Open Standard
Adrian ArcherMember for 23 years 10 months
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Greetings,
I’ve a quick question on how P6 treats level of effort activities when it flags activities as either critical or not critical.
It appears that if a level of effort activity in P6.0 contains a mix of critical and non-critical activities, it will cause all of its member activities to be flagged as critical. From that, it seems that all of a non-critical activity’s predecessors get flagged as bright red too, even if they’re driving nothing at all.
Is this correct and, if so, does anyone know how I might be able to have P6 ignore non-critical activities that become flagged otherwise just because they are associated with LOE activities that contain genuinely critical activities?
So far, neither "longest path" nor "total float less than ..." settings change how these non-critical activities are flagged. Also, multiple path settings don’t seem to be able to distinguish between them either.
Much obliged for any feedback,
Adrian.
I’ve a quick question on how P6 treats level of effort activities when it flags activities as either critical or not critical.
It appears that if a level of effort activity in P6.0 contains a mix of critical and non-critical activities, it will cause all of its member activities to be flagged as critical. From that, it seems that all of a non-critical activity’s predecessors get flagged as bright red too, even if they’re driving nothing at all.
Is this correct and, if so, does anyone know how I might be able to have P6 ignore non-critical activities that become flagged otherwise just because they are associated with LOE activities that contain genuinely critical activities?
So far, neither "longest path" nor "total float less than ..." settings change how these non-critical activities are flagged. Also, multiple path settings don’t seem to be able to distinguish between them either.
Much obliged for any feedback,
Adrian.
5 replies
Oldest first- 0Samer Zawaydeh ·Dear Adrian,
It seems that you are trying to do something. How big is your Program of Works?
It is better to have clearly understood sequence and relationships between activities. Take it one step at a time and keep it simple. Sonuds like the best thing to do is to start over and know exactly what is going on at each step of the way.
With kind regards,
Samer - 0Adrian Archer ·Dear Samer,
Thank you for taking the time to reply to my post.
This isn’t a schedule that I’m building, rather one that I’m analysing. Part of that analysis is tracing critical and near-critical paths in dozens of updates, all of which have many LOEs, some of which contain critical activities.
Any feedback on if/how/why P6.0 flags non-critical activities that get caught up with LOEs with critical activities would be great.
Thanks,
Adrian. - 0Samer Zawaydeh ·Dear Adrian,
It would be best to try to understand one step at a time. You need to identify all the relationships and the dependencies and take one case and try to analyze it and see what happens. Most probably you have an error in these, that is why you have difficulties in explaining the results.
Following the critical activities and the noncritical activities with some float is not too difficult. The constraints and relationships makes it more difficult.
Take one reporting cycle and try to familiarize yourself with the Program at the start of the cycle and do all the updates as per the daily reports. Then try to check if you get the same update at the end of the cycle as per the results of reported.
Depending on the size of the program, maybe you can recreate it and try to take it one step at a time.
With kind regards,
Samer - 0Ian Nicholson ·This is a bug in P6. In theory LOE’s should never be critical since they don’t drive anything but in P6 LOE’s come up as critical quite often. From the knowledgebase:
"LOE activities are summary-type activities and do not drive the schedule. Because of this, Project Management will never mark an LOE as critical, even if it fits the definition under Scheduling options".
I have not noticed that this causes other activities to become critical as well but I usually filter out LOE’s when I am doing critical path analysis.
I have also noticed that LOE’s will have an incorrect late start date when they are in progress (it gets set to the actual start date), which may be a related bug, particularly if you are calculating float off of start dates.
Ian
http://emerald-associates.com
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