For your immediate review, please download the latest free resource paper from PII, titled Best Practices for PHA Revalidations, co-written by Revonda P. Tew – PII Principal Engineer & Instructor, Matias A. Massello – PII Principal Engineer & Instructor, and William G. Bridges, PII President & Instructor, and being presented at the 14th Global Congress on Process Safety in Orlando, Florida.

From the Abstract:

Process hazard analyses (PHAs) must be updated and revalidated every 5 years or sooner. PHA/HAZOP Revalidation is entirely different than a baseline or original PHA. The original textbook from CCPS on Revalidating PHAs was issued in 2001. This paper describes the current best practice approaches to revalidation and explains when to use each approach. The approaches are described in detailed flowcharts. Checklists for decisions making and quality control are provided, along with examples of completed documentation. This paper is based on completion of more than 300 Revalidations.

For other valuable free resource papers available from Process Improvement Institute, please visit the Free Resources section of the PII website at