There are Several ApproachesUsed to Collect the % Complete
Units Method– easily measured pieces of workrequiring about the same amount of effort.
Incremental Milestones– any work iteminvolving parts that must be handled insequence.
Start/Finish– any work item where a %complete is easy to measure or compute
Opinion– any piece of work where othermethods are too difficult.
Cost Ratio– used only on administrative tasksactive over the life of the project.
Project Managers may any or all of these methods to measure work progress. You should illustrate with examples. This is covered in detail in the CII Publication.