Operational definition: When is it used?

Any time data is being collected, it is necessary to define how to collect the data. Data that is not defined will usually be inconsistent and will give an erroneous result. It is easy to assume that those collecting the data understand what and how to complete the task. However, people have different opinions and views, and these will affect the data collection. The only way to ensure consistent data collection is by means of a detailed operational definition that eliminates ambiguity.

See also:
>Operational definition: What is it?
>Operational definition: What does it look like?
>Operational definition: How is it made?

The above article is an excerpt from the "Operational definition" chapter of Practical Tools for Continuous Improvement Volume 1 Statistical Tools. The full chapter provides more details on creating operational definition. This reference book is available from PQ Systems.