Dual system means the use of both traditional and metric systems. For example, an item is designated, produced and described in inch-pound values with soft metric values also shown for information or comparison.
Hard metric means the use of only standard metric (SI) measurements in specifications, standards, supplies and services.
Hybrid system means the use of both traditional and hard metric values in specifications, standards, supplies and services.
Measurement sensitive means any item having an application or meaning depending substantially on some measured quantity. For example, measurement sensitive items include product or performance criteria and standards binding on others, such as emission levels, size and weight limitations, etc.
Metric system means the International System of Units (Le System International d'Unites (SI)) of the International Bureau of Weights and Measures.
Metrication means any act that increases metric system use, including metric training and initiation or conversion of measurement sensitive processes and systems to the metric system.
Soft metric means the result of mathematical conversion of inch-pound measurements to metric equivalents. The physical dimensions, however, are not changed.
Traditional system of weights and measurements means the predominant weight and measurement system currently used in the United States, also referred to as the "inch-pound system." The traditional system includes such commonly used units as inch, foot, yard, mile, pint, quart, gallon, bushel, ounce (fluid and avoirdupois), pound, degree Fahrenheit, ampere, candela, and second.
48 C.F.R. §§611.002-70