Why learn that indicators are simple algorithms that combine and then process metrics that may not be related but when used together provide a switch for needed change.
Conceptual Pattern for Indicator
An indicator is a measurable variable and signal for attracting attention to something observed or calculated and shows the presence or state of a condition, trend, or representation of an associated (but non-measured or non-measurable) factor or quantity. It is a message based on an assumption or provision that is an incitement to action. An indicator encodes an agreed upon message that is understood as the occasion for concerted action. A indicator rests upon the validity or effect for something else to happen and is a statement or declaration setting forth particulars or facts regarding something real or alleged, especially one meant to induce a response and expressed by a term, character, or symbol. (Pattern Engine – Indicator N=12 © 2014)
If indicators are understood then the meaning of quality will follow.
First Principle: The purpose of an indicator is to provide the basis for change.
Second Principle: The mean, median and mode are indicators of central tendency and must approximate the target for measured process characteristics.
Third Principle: Variance and standard deviation values are indicators of spread or dispersion in data about the central tendency.
Fourth Principle: Standard error is an indicator of the average deviation between a measurement and the average of many repeated measurements of the same thing. 1
Fifth Principle: Test-Retest Error is an indicator of variation that exists in duplicate measurements of any specific indicator. 1
Sixth Principle: The Discrimination Ratio is an indicator that quantifies the relative usefulness of a measurement process for a specific characteristic and may be used to establish priorities with regard to improvement efforts. 1
Key Conceptual Patterns
A change is a process and event that occurs when something passes from one state or phase to another and by which things become different by varying from a routine or pattern. Change is the occurrence of a difference in a sustained phenomenon. Change is a series of actions directed toward a specific aim intended to achieve a result. that happens due to a special set of circumstances and is particularly significant between two or more things that depart from expectations and vary from a norm or standard. (Pattern Engine – Change N=12 © 2014)
A characteristic is any measurable property or feature that helps to distinguish an item, person, phenomenon, etc., usually divided into three categories: (1) physical, (2) functional, and (3) operational. A characteristic is an abstract measurable construct belonging to an entity a, group or set of things. A characteristic is peculiar to a whole class whereby objects or individuals can be distinguished, set apart from similar items or offered as a special attraction that share common attributes marking divisions or coordination’s in a conceptual scheme. (Pattern Engine – Characteristic N=12 © 2014)
Next Post – Variation – A Blessing or a Curse
1 Donald J. Wheeler and Richard W. Lyday, EMP, Evaluating the Measurement Process, 1989