SI-Metric: A Positive Quality Response


Gat, Uri   (1988, ASQC)   Oak Ridge National Laboratory, Oak Ridge, TN

Annual Quality Congress, Dallas TX    Vol. 42    No. 0
QICID: 3489    May 1988    pp. 620-624
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Article Abstract

Total commitment to SI, the only state-of-the-art system of units, is a positive response to the challenge of quality. Exclusive use of SI facilitates, enhances and simplifies quality. Shunning non-SI usage circumvents many quality pitfalls.

SI properties are quality assets. The SI is:

- that is well thought out, logical, and systematic: thus avoids misunderstandings, abiguities, and possible confusion.
- no system-related conversion units; avoids confusion and mistakes.
One Unit per Measure
- each measure has its own, well defined unit; no conversions amongst units of one measure; mistakes, mix-ups, and confusions are avoided.
Unique Unit
- the symbols are completely defined and language independent; complete clarity, no confusion contributes to quality
- uses the same numerical system that is in common use; simple, straightforward calculations and notation; no confusion.
- uses a wide range of prefixes that cover the practical applications; this facilitates quality expression and accuracy; no ambiguous digits; conveys the meaning of intended quality.
- based on state-of-the-art, is completely defined, maintained, universal, and completely documented with readily accessible documents; responds to quality needs and requirements.
SI responds to quality requirements:
- clear, umambiguous, authoritative, maintained, and accessible organization
- the SI is completely organized with strict controls, well qualified, and standardized.
- the SI language is totally defined and controlled with built-in verification and universal; assures design quality
- the defined universal language and inherent support of accuracy and tolerances contributes to quality procurement
Instruction, Drawings
- a clear, simple, and compact language simplifies instruction and assures the quality of control. The decimal system prevents conversion, time waste, and mistakes. Unique units avoid confusion.
- singular language of measurements assures all participants and inspectors use the same language; misunderstandings and conversion errors are avoided
Test Control (instruments and gauges)
- using same units in testing, on all instruments, and in engineering applications contributes to quality. Calibration, accuracy, and tolerances control are simplified.
Storage and Shipping
- using same units at all stages - ordering shipping, storage, and application - contributes to quality. Using SI in all facets of endeavor is major positive to the challenge of quality.



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