Can someone explain to me this situation :
Is it possible to have dropping SPI for last 3 periods and the progress actual curve trailing on the slightly above late curve line? The forecast curve continues to show possible improvement starting from the September data period.
PS, the programme was revised last 3 months with some efficiency introduced into the logic and construction methodology.
Earned value method as a tool for project control
4.3. Inferences on future schedule development on the basis of SV i SPI - It is worth remembering that SV ($) and SPI (%) are considered to be measures of time deviation, but they are in fact the measure of difference between the cost of work planned and work done. In practice they are only indirectly and approximately related to the project’s time scale.
Some of us find EVM flawed for many reasons, just to name a few;