At the end, he checked how many of them had finished their project before their estimated time of completion.

FORBES: People always finish projects behind schedule and over budget - but here is some help

In any case, when the invitation comes for working on the next DSM, it would be wise -- as for any significant remodeling project -- to double the estimate for time to completion.

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Then he checked whether there was a real deadline for their project (which was true for about half of them) and asked them for their estimate of their completion time.

FORBES: People always finish projects behind schedule and over budget - but here is some help