It will be standardized the % completion for multiple updaters.
If we have 3 updaters for a task that have 4 stages.
If the task move to stage 3, one might look into a number of stages and give it a 75% complete. Another might look into the work and give 25% complete. Last one might think the first stage should be 0%. So he devide the rest into 33% each and give a 66%.