Main Page | See live article | Alphabetical index "An operational definition is a procedure agreed upon for translation of a concept into measurement of some kind." - W. Edwards Deming "There is no true value of any characteristic, state, or condition that is defined in terms of measurement or observation. Change of procedure for measurement (change of operational definition) or observation produces a new number." - W. Edwards Deming This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.