In earned value analysis, if SPI>1, does this really means that programme is ahead than planned and it’s going to finish earlier than target finish date. Q: What if the work has been completed on some non critical activities which were not planned to start by that time but were actually started and progressed well yielding a financial credit to BCWP . . . and at the same time work was’nt progressed well on the critical path activities eventually slipping the project end date.
Vice versa SPI<1, should’nt necessarily means that project end date is slipping . . because may the work is being done satisfactorily on the critical path activities and some slight deficiencies in progress may exisit in the non critical activities resulting BCWP
In such cases SPI will be in contradiction to the real project finish date.
Note : Assume BCWS is based on the Early dates.