Have you ever added extra time to a project because you knew it would probably take longer than expected?
And then it still took longer than expected?
That is the particularly irritating brilliance of Hofstadter’s Law:
Things usually take longer than expected, even when we plan for delays.
The problem is that extra time does not automatically fix unclear expectations, hidden dependencies, slow decisions, or work nobody realized had to be done.
We often treat time as the problem when the real problem is buried somewhere inside the process.
So yes, build in some breathing room.
But before adding another week, it may be worth finding out why the first three weeks disappeared.
Roberto Zamora, Jr., Ph.D.