4.3. Inferences on future schedule development on the basis of SV i SPI - It is worth remembering that SV ($) and SPI (%) are considered to be measures of time deviation, but they are in fact the measure of difference between the cost of work planned and work done. In practice they are only indirectly and approximately related to the project’s time scale.
Some of us find EVM flawed for many reasons, just to name a few;
It does not distinguish between the works done on critical activities and activities with sufficient floats. A project could be late but EVA will not notice this problem if Earned Value exceeds Planned Value.
It motivates project managers to do expensive tasks first delaying cheaper activities that could have higher priorities.
The DOD the father of the creature warns against its use on fixed price contracts.
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21 years 8 monthsEarned value method as a tool
Earned value method as a tool for project control
4.3. Inferences on future schedule development on the basis of SV i SPI - It is worth remembering that SV ($) 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;