MS Project :: You need to know these terms

Here are some useful interpretation

Duration = Actual Duration + Remaining Duration
Percent (%) Complete = Actual Duration / Duration
Work = Actual Work + Remaining Work
Percent (%) of Work Complete = Actual Work / Work
Start: At the beginning it is the baselined start, later one it will be replaced by the actual start
Finish: At the beginning it is the baselined finish, later one it will be replaced by the actual finish

Note: Remember to baseline your plan to save the original values

Best Regards

Bilal Okour