Reason of Delay

Really this is a excellent way to know what delay some activity, I did the same you, I just use reason of delay to analyse. The ideia of put on the additional tab is good.

• The above is an example of a Note long enough to showcase the issue. 
• Please take notice about my comment within this note regarding the display of User Fields values.
• Also note that hovering does not always display all the information as you can see in the following image.
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Another important calculated data are the assignment floats, maybe also an additional tab to display activity assignment floats would be convenient. A scrolling table showing Team, Multi-Resource, Resource, Start Float and Finish Float should do it.

It will also serve as a reminder that Activity floats do not provide all the data necessary for project control. In the projects with the complicated resource assignments there may be situations when an activity has different start and finish floats. Resources are often separately assigned on an activity. There are several types of independent assignments. Thus, a team of resources can be assigned on an activity to do a certain amount of work, or for a certain period of time, while other resource teams perform the rest of activity work independently. When you have 3 teams an activity not start and not finish critical might have a critical resource assignment.