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Time Extension Requests
ØTime extension requests should be considered and acted upon.
ØArbitrary rejection is dangerous.  Review and respond to all time extension requests.
ØRequire a critical path analysis that proves the [potential] impact of the event. 
qRequire a fragnet/subnet to be included in the overall project CPM. 
qCheck other paths, particularly prior critical path.
qConsider possible ways to mitigate the event.  Is it really a delay?
qIf request submitted after delay is over, require proof that event actually affected critical path.