DAVION

SYSTEMS

Uniform Distribution

 

The uniform distribution is typically used where there is quantity uncertainty only (no scope uncertainty) and there is no standard rate or expected cost for the work.

 

A uniform distribution has a constant level of probability from one end of the range to the other, and zero probability outside the range.

 

Modelling a cost as $10,000 -10%/+20% with a uniform distribution indicates a belief that the actual cost will be in the range $9,000 to $12,000, with no particular preference for any cost within this range.

 

Using this distribution also indicates a belief that under no circumstances will the actual cost be outside the specified range.