(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.
Unbelievably this is a paper
Unbelievably this is a paper published by the same organization that in one of their recommended practices is clearly against computer assisted resource planning because of Delay Paranoia.
http://www.aacei.org/non/rps/53R-06.pdf
In their Delay Paranoia they pretend to create forensic procedures to be applied as if cooking recipes.
I enjoyed the article very much and would like to se it expanded to the application of approaches such as Critical Chain and Statistical Analysis that promote targeting for an early schedule to increase probabilities of success.