When attempting to use durations entered in units of months, weeks, e weeks, or e months we found that MSP does not forecast the finish date accurately. This has led us to set up a best practice of entering all of our durations in our projects in the unit of days or e days. Has anyone else come across this same issue?
I have not encountered the months and weeks issue in MSP. The company I work for follows the 8/80 rule for assigning duration. In most projects I have managed, I found this as a good rule. It keeps my project tasks very manageable and easy to control.
I found a better way in managng the tasks and durations when entering units. Move all constraints dates to deadline. This way your finish date will not mess up.