Page 313 - Root Cause Failure Analysis

Glossary 301
regulatory compliance Regulatory-compliance issues associated with
work-related incidents generally fall into the
domains of safety, which is regulated by OSHA,
and the environment, which is regulated by the
EPA and state and local governments.

reliability engineering Discipline dealing with the probability that a
component part, equipment, or system will
satisfactorily perform its intended function under
given circumstances, such as environmental
conditions, limitations as to operating time, and
frequency and thoroughness of maintenance for a
specified period of time.
resonance A large amplitude vibration in a mechanical
system caused by a small periodic stimulus of the
same or nearly the same period as the natural
vibration period of the system. Higher levels of
input energy can result in catastrophic, near
instantaneous failure of the machine or structure.

roll A cylinder mounted in bearings used for such
functions as shaping, crushing, moving, or
printing work passing by it.

roller spin The speed at which a bearing's roller turns in its
races.
root cause The true source of a problem or event.

rotor Any rotating part of a machine.
runout Axial or radial looseness. A measure of shaft
wobble caused by being off center.

saturation point or pressure The pressure of a thermodynamic system, at a
given temperature, where the vapor of a
substance is in equilibrium with that substance's
pure liquid or solid phase.

schematic diagram A presentation of the element-by-element
relationship of all parts of a system.
score marks Parallel scratches, lines, or grooves.
seal A means of preventing migration of fluids,
gases, or particles across a joint or opening.
seat The fixed, pressure-containing portion of a valve
that comes into contact with the moving portions
of that valve.