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Critical safe operating parameters: “Never exceed” limit and “never deviate” action
Author(s) -
Dowell A. M.
Publication year - 2001
Publication title -
process safety progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.378
H-Index - 40
eISSN - 1547-5913
pISSN - 1066-8527
DOI - 10.1002/prs.680200310
Subject(s) - safer , action (physics) , limit (mathematics) , process (computing) , risk analysis (engineering) , computer science , shutdown , operating point , reliability engineering , engineering , computer security , nuclear engineering , business , electrical engineering , physics , mathematics , operating system , mathematical analysis , quantum mechanics
Where does the human being fit in the normal operating system and where does he/she fit in the safety shutdown system? Planning ahead can make human interaction inherently safer. This paper offers the following suggestions for managing that interaction: (1) Use inherently safer principles in the design of the process and its layers of protection. (2) Define “Never Exceed” limits for critical safe operating parameters. (3) Define a mandatory action point and a “Never Deviate” action with enough response time to prevent exceeding the Never Exceed limit. (4) Train and drill.