When to use 20/80 or 50/50 on quality management?

PMP Fighter's picture

i see these terms occasionally,but not much go thought on PMBOK or Rita, so does it exist on real exam?

You will see them in Earned value analysis, and estimations

They're use to tell you how much % of the task is considered done at the start and at the end.

 

For example.

You have a task that take 10 days. Applying 20/80, how much of the task is done by day5?

50%? Wrong. Because you're applying 20/80, means that you count 20% of the task done from the start until the end when you add the other 80%

Same goes for 50/50 or 25/75...

I don't know if i made myself clear. Feel free to ask further