Metering, monitoring and targeting

Flow metering;
Justifying extra submeters

Data collection:
Manual meter reading;
Automatic meter reading;

Analysis and reporting:
Guide to monitoring and targeting;
Principles of automatic monitoring and targeting

Other resources:
The Switch2 Energy Solutions web site summarises the attributes of various meters for electricity, gas, steam, compressed air, water, and oil. The Spirax Sarco Learning Centre has an extremely good module on steam flow metering.