Process safety performance indicators (PSPIs) are performance metrics that indicate when a process safety accident is most likely to occur. The key to an effective PSPI program is selecting the right PSPIs. This month’s safety article explains the barrier-based and tier-based approaches for selecting PSPIs. Other topics this month include PID tuning coefficients, electrolyte simulation, and polymerization reaction systems.
An Editor Changes Their Mind about They
When I began my career in 1980, women were a small fraction of the engineering workforce, and engineers were typically referred to by the pronouns he and him. That sexist language bothered me, so wherever I could, I used gender-neutral terms — such as synthetic instead of man-made, and firefighter instead of fireman — and rewrote sentences to avoid the need for any pronoun. In all that time, I was vigilant to not write they or their with a singular antecedent.
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