(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.
I have updated my data date and updated the remaining durations for activities but a few would have a remaining duration of 2 days, but the forecast finish date would be two week out.
The predecessor was complete (both start and finish checked complete). Also, the gnatt char bar separates the actual progress from the remainng duration.
Has anyone seen this problem and know the solution?
Thank you for your help.
Printer-friendly version
Send to friend
glad I could help sometimes you have to go very far back to find the culprit pushing thru the completed activity.
I have written a paper on this and have posted here at Planning Planet in the library. It gives you several way on how to track down the driver.
here is the link
http://www.planningplanet.com/guild/library/cpm-scheduling-driving-throu...
Thank you all for your help!
Yes it was out of sequence logic. I had a milestone about 3 predecessors back that was not checked finished. That had thrown my activity remaining duration out of sequence.
Finding why and where there is Out-Of-Sequence progress is easy, look for broken links. Merely knowing that an activity is out-of-sequence is not good enough, a report that only lists out-of-sequence activities is not good enough.
It would be insane if on a thousand activities, thousand links schedule you look for broken links following one by one the links and calculating remaining lag taking into consideration lag calendar, let the computer do the math.
Extended Relationship Database System
In the following example predecessor activity is finished but there is still some remaining lag that is broken. Think of lag as an activity who represent elapsed time and that is calculated automatically.
Once you know the broken link you might still need to know elapsed and remaining lag to fix logic.
If using hammocks or if using formulas and a script you can calculate Remaining Lag but it is somewhat complicated.
I agree with Ron Winter, it is time for CPM to include Remaining Lag.
first problem is that you have out of sequence progress
here is an example
activity A,B,C & D all tied finish to start
activity A is complete
activity B has started but 2 days are remaining
activity C is completed
activity D has started but has 5 days remaining
you are using retained logic so it is honoring the logic whihc means that
The remaining 5 days for activity D CAN NOT START unitl the remaining 2 days for activity B have been completed
This means that the logic from activity B is PUSHING THROUGH activity C (which is competed) preventing the REMAINING duration for activity D to begin.
Second problem go to view bars then highlight the actual work row in the 3rd column chnage the time scale to current bar . that will fill the gap that is showing.
Check your schedule log for Out of sequence activities. Even if all of the activity's predecessors have been completed, if one of the predeccessor's predeccesors has not been, then this can cause the issue you describe.
Other possible reasons are calendar issues, and external constraints.
HANDLING OUT-OF-SEQUENCE PROGRESS
Good Luck.
Email: PPadmin@planningplanet.com
Replies