ABSTRACT
Cause. The means by which a particular element of the design or process results in a failure mode. Contaminant. Any foreign or unwanted solid, liquid, or gaseous substance present in the lubricant and
working fluid that may have a detrimental effect on the condition of a machine. Criticality. The criticality rating is the mathematical product of the Severity (S) and Occurrence (O)
ratings. Criticality = (S)×(O). This number is used to place priority on items that require additional quality planning.
