[ksec]

Or more like the last 20% of work takes the same effort as first 80% of work. Which is the 80/20 rule. But increasingly I believe the 90/10 rules works better.

As a matter of fact I tend to think of it the first 80% is 80% of work, the 80% of the 20% left is same as first 80% of work. The last 4% polishing is another first 80% of the work. I think that is a good rule for general project management.