Construction Planning and Management
Frequency distribution curves

If not symmetrical, are called skew curves
If symmetrical, are called normal curves
All listed here
Having a single lump, are called uninodal curves

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Construction Planning and Management
In time-cost optimization of a project, crashing is done.

On all the activities lying on the critical path
On original critical activities and those that become critical at any stage of crashing in the order of ascending cost slope
On all the activities
Only on activities lying on the original critical path and having flatter cost slopes

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