Why learn that the metrics of an ideal state are closely related to variation, targets, performance and control?
Conceptual Pattern for Metric
A metric is a standard system of related measurement statistics by which efficiency, performance, progress, or quality of a plan, process, or product can be assessed and quantified. A metric is an assigned piece of information based on a system of measurement. Metrics are numerical representations of any measurable characteristic of some subjective aspect (attribute, property) according to a rule or arbitrary scale, e.g. a mean or standard deviation, used to describe a sample or population made meaningful by quantifying into specific units. (Pattern Engine – Metric N=12 © 2014)
If metrics are understood then the meaning of Quality will follow.
First Principle: The purpose of a metric is to provide measurements for the management, monitoring and improvement of activities and processes.
Second Principle: A measured value from an activity or process can be considered to be in an ideal state only by satisfying four conditions: inherent stability over time, the process is operated with the goal of consistency and stability, the process average (target) is set at the proper level, the natural process spread must be less than the specified tolerance for the measurement characteristic value.1
Third Principle: A measurement value that is in the ideal state is predictable and is producing one-hundred percent conforming product. 1
Fourth Principle: Conformity will be a consequence of natural process limits which fall within specification limits.1
Fifth Principle: Metrics need to have targets based on research.2
Sixth Principle Multiple metrics can be combined into several overall indices of performance.2
Key Conceptual Patterns
An ideal is an example and model of standardized excellence. It is a representative member or example offered as a basis for comparison. An ideal is a typical version of a concept, phenomenon, relationship, structure, system, or an aspect of the real world that deserves to be imitated as a pattern. It is typical by virtue of having features of the thing it represents and is universally or widely accepted, agreed upon, or established means of determining what something should be and is accepted as the norm or by which actual attainments are judged. (Pattern Engine – Ideal N=12 © 2014)
Conformity is compliance with a fixed standard, regulation, requirement or practice according to a particular set of rules. Conformity is a prescribed guide establishing a customary way of meeting requirements. Conformity is a confirmed set of accepted standard operations especially those that have been developed through experience and knowledge and authoritative principles resulting in translating ideas into into action and are accepted as true and can be used as a basis for reasoning, conduct or action. (Pattern Engine – Conformity N=12 © 2014)
Nest Post: – Indicators – Harbingers of needed change.
- Donald Wheeler, Advanced Topics in Statistical Process Control, 1995
- Mark Graham Brown, Keeping Score, 1996