Forecasting - control cost

 How will you explain atypical and typical variance  through statement  and not by defination ?

ETC=(BAC-EV)

ETC=(BAC-EV)/CPI

 

 If a project , in any point of time have cumm CPI say 0.xyz, and it seems or if forecosted that this performance index  will be continue for a cetain point of time, then you can say it is a typical case.

If you forecosting that further changes will not follow past performance , then it will be atyical case.

stated formula are not truly written as example of typical and atypical case.

ETC = EAC - AC = (BAC/CPI) - AC. _ typical case

ETC = EAC - AC doesn't= (BAC/CPI) - AC _ atypical case

 Thanks  sspawar 

Thanks admin.Following link ,answered by sadityas was also helpful