scopeeconomics

Comparable projects show different prices. You are putting them on a common basis, then locating the remaining scope or delivery difference.
Construction estimate reviewInspect two historical projects. Look at their capacity, location, price year and scope.
Compare scope and operating requirements before treating a cost difference as inefficiency.

Select a marker to connect the physical work to the estimate.
Brandonrush · CC BY-SA 3.0 · resized; numbered markers added.
Source: https://commons.wikimedia.org/wiki/File:Siloam_Springs_WWTP_003.jpg
Licence: https://creativecommons.org/licenses/by-sa/3.0/

Illustrative scene. Use the lesson figures and records for measurements.
Select a project to inspect the basis behind its price. Records are fictional learning data.