September 2024 | AIChE

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September 2024

Performance-Based Requirement

A requirement that defines necessary results without defining the specific means to accomplish them, the "what to do," but not "how to do it." The means for producing the desired results is left up to the discretion of the facility based on an evaluation of its needs and conditions, and on industry...

Performance Measure

A metric used to monitor or evaluate the operation of a program activity or management system.

Performance Assurance

A formal management system that requires workers to demonstrate that they understand a training module and can apply the training in practical situations. Performance assurance is normally an ongoing process to; 1) ensure that workers meet performance standards and maintain proficiency throughout...

Performance

A measure of the quality or utility of PSM program work products and work activities.

Passive System

A system in which failures are only revealed by testing or when a demand has occurred.

Passive Gas

A gas whose density is equal to that of the ambient air. Synonymous with neutral.

Passive Equipment

Hardware that is not physically actuated in order to perform its function, such as secondary containment, a blast wall, piping, and storage tanks.

Passive Dispersion

Dispersion caused by the normal turbulence in the atmosphere. See Gaussian model.

Particulate Material

Any solid material composed of distinct particles or pieces, regardless of size, shape, or chemical composition. Particulate materials include dusts, fibers, fines, chips, chunks, flakes, or mixtures of these.

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