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  5. The Ninety-Ninety Rule of Project Schedules - the first...

The Ninety-Ninety Rule of Project Schedules - the first ninety percent of the task takes ninety percent of the time, and the last ten percent takes the other ninety percent.

Arthur Bloch
Tasks, Schedules, Lasts
The Ninety-Ninety Rule of Project Schedules - the first ninety percent of the task takes ninety percent of the time, and the last ten percent takes the other ninety percent.