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Definition:
Number or that a directly
observable or All have a attached to
them: inch, centimeter, dollar, liter, etc. In contrast, an
indicator is an indirect measure or a predictor (such as a
leading Indicator) of performance.
Durometer is one of
several measures of the hardness of a material. Hardness may be
defined as a material's resistance to permanent indentation. The
durometer scale was defined by Albert F. Shore, who developed a
measurement device called a durometer in the 1920s. The term
durometer is often used to refer to the measurement,
There are several scales of durometer, used for
materials with different properties. The two most common scales,
using slightly different measurement systems, are the ASTM D2240
type A and type D scales. The A scale is for softer plastics,
while the D scale is for harder ones. However, the
ASTM D2240-00 testing
standard calls for a total of 12 scales, depending on the
intended use; types A, B, C, D, DO, E, M, O, OO, OOO, OOO-S, and
R. Each scale results in a value between 0 and 100, with higher
values indicating a harder material
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