scopeeconomics

Installation is complete only in a physical sense. You are identifying the tests, approvals and connections needed before the main can enter service.
Water-main commissioningThe main is installed. Open the integrity-test, water-quality and connection-authorisation records. They are not yet complete.
Physical installation is followed by testing, acceptance and a controlled connection to the operating system.

Select a marker to connect the physical work to the estimate.
Tomas Castelazo · CC BY-SA 3.0 · resized; numbered markers added.
Source: https://commons.wikimedia.org/wiki/File:114_inch_pipe_installation.jpg
Licence: https://creativecommons.org/licenses/by-sa/3.0/

Illustrative scene. Use the lesson figures and records for measurements.