Controlled Process and Physical Component Design

Protection against component failure accidents is well understood in engineering. Principles for safe design of common hardware systems (including sensors and actuators) with standard safety constraints are often systematized and encoded in checklists for an industry, such as mechanical design or electrical design. In addition. 

Eiimination of specific human errors Reduction of hazardous materiais or conditions 

Design for controiiabiiity Barriers Lockouts Lockins Interlocks 

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