(1) Explain your problem, don't simply post "This isn't working". What were you doing when you faced the problem? What have you tried to resolve - did you look for a solution using "Search" ? Has it happened just once or several times?
(2) It's also good to get feedback when a solution is found, return to the original post to explain how it was resolved so that more people can also use the results.
Please help me I am just wondering why how can an activity have a negative float of over -200 days when the overall total delay to the project is only -61 days?
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I would check for outside links to other projects. I had an issue before where I had an outside link that was causing the negative float. The project was actually deleted and still showed a link somehow, but after I found it and removed it the float corrected itself. If this is not the case, then from my experiences, it is most likely a constraint that is causing the problem.
Definitively Negative float is always caused by a constraint – you just have to find it…...
The real challenge is when it is a constraint on the computations placed not by you but by the software like when solving out-of-sequence events. This can be further complicated if your project have outside links to jobs with out-of-sequence events that are driving nuts your schedule late dates computations and therefore your float values.
Negative float is always caused by a constraint – you just have to find it…... To understand how the calculations work in most scheduling tools see: http://www.mosaicprojects.com.au/PDF/Schedule_Float.pdf
Float is based on activity calendar.
Calendar 1 is for a 5 days work week and Calendar 2 is for a 7 days work week. It is the available work days before it becomes critical that matter. What if for Activity 2 the following week have exceptions for all days?
One final point is that Float is measured in working days not calendar days, so a negative float of -200 days using one activity calendar, could equate to a negartive float of -40 days on another calendar.
In Addition to Mr.Rafael's Information
Check the activity which has the latest date and keep following the predecessor link,you can get info about the relationships and lag used which might be illogical
Cheer's
Shahul
From: https://forums.oracle.com/forums/thread.jspa?threadID=881584
There are two primary causes of negative float on activities.
1. If a Must Finish By constraint is assigned at the project level, this could cause negative float if the project cannot be completed by the constraint date. Check the Must Finish By date in Projects View, Dates tab.
2. If a mandatory constraint is assigned to an activity, this could cause negative float if the predecessor activities do not have enough time to finish. Run a schedule report to check for constraints.
Other possible sources of negative float:
My observation is that people tend to overlook the out-of-sequence and leveling reasons as well as outside links.
Regards,
Rafael
Dear
Please check in setting
Total float is less than or equal to ( 0 )
Email: PPadmin@planningplanet.com
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