Frequency

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Categories: Terms

A measure commonly expressed in a quantitative (e.g., 1 to 10 scale) or qualitative (e.g., frequent, probable, improbable, etc.) manner.

Environment and use profiling or characterization
The set of environmental factors and range (or distribution) of values during manufacturing, shipping, storage, and use appling (or expected to apply) to an item. This includes factors such as weather (e.g.,temperature, humidity, and wind) and usage (e.g., frequency, human interaction, misuse). Often includes details concerning potential sources of stress(es) on an item. A range provides boundaries for the expected stress, whereas a distribution enables advanced forms of stress analysis.
Pareto analysis
A graphical display of count, frequency or percentages of failure modes, mechanisms, or sources of variation ordered from highest to lowest contribution to overall product or system issues. A Pareto analysis provides an simple method for an organization to identify the costliest or most often occurring events.
Criticality
A relative measure of the consequence and frequency of occurrence of a failure mode.
Economic-life limit
A life limit imposed on an item to reduce the frequency of age-related failures that have economic consequences.
Gaussian random vibration
Vibration that exhibits acceleration and frequency values within a time interval in a stochastic manner, acceleration values with a normal (Gaussian) probability density function, and frequency values with a uniform distribution.