Final answer:
Variations of earned value techniques are indeed possible and they allow for more accurate project tracking by incorporating partial completion between milestones and adjusting the standard values.
Step-by-step explanation:
True, variations of the earned value techniques described can be possible by allowing partial percent complete between incremental milestones or by varying the start and completion values of the 50/50 techniques. Earned value management (EVM) is a project management method used to measure project performance and progress in an objective manner. By allowing for partial percent complete, a more granular and potentially accurate measure of progress can be gauged. Similarly, adjusting the start and completion values provides flexibility to accommodate different project scenarios and complexities.