The order of pump system assessment is described in standards ISO14414 "Pumping systems energy assessment" and ASME Pump Assessment Standard & Guidance Document​

The Department of Energy of The USA Best Practices Program encourages a three tiered prescreening and assessment approach that includes:

- Initial prescreening based on size, run time and pump type. (Usually >35kW and long running time)

- Secondary prescreening to narrow the focus to systems where significant energy saving opportunities are more likely.

- Evaluating the opportunities and quantifying the potential savings.

Objectives of the Pump Standard/Guidance Document.


- Provide a step by step approach to performing a pump system energy assessment.

- Identify energy assessment levels and the effort required for each type of assessment

- Emphasize the importance of taking a systems approach

- Review equipment data that should be collected for pump system evaluations.

- Become familiar with solutions for pump system optimization.

- Present the results in a suitable format.

In accordance with standard  ISO 14414 "Pumping systems energy assessment" assessment can be done on three levels.

Level 1 assessment. 

On a level 1 assessment is a qualitative review with possible quantitative elements intended to determine the potential for significant energy savings based on further assessments and to identify specific systems that merit greater level of attention.

Level 2 assessment.

A level 2 assessment is a quantitative review intended to determine energy consumption and potential savings based on measurement of a single steady state operating condition requiring a single set of measurements.

Level 3 assessment.

A level 3 assessment is a quantitative review that takes varying system demands into account by monitoring the system over a time span long enough to capture the various operating conditions which require their own set of measurements.