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Process Hazard Analysis

Process Hazard Analysis

Having written the book for process hazard evaluation that industry follows and performed thousands of process hazard analysis (PHA) studies, our engineers are respected experts in their field. We have also participated as an industry advocate in the OSHA PSM and EPA RMP rulemaking processes, giving us unique insight into how to satisfy the PHA and revalidation provisions of these regulations.

We Wrote the Book

ABS Group has more experience in PHAs, both domestically and internationally, than any other company providing services in these areas. In fact, we wrote the book for process hazard evaluation that industry follows, Guidelines for Hazard Evaluation Procedures, Second Edition with Worked Examples, which was published by the American Institute of Chemical Engineers' Center for Chemical Process Safety and which is referenced in Appendix D of OSHA's PSM regulation.

We can work with your staff to provide a full range of PHA services including HAZOP analysis, what-if/checklists, HAZID studies, FMEA or FMECA, fault tree and event tree analyses, bowtie analysis using our THESIS BowTie™ risk management software and other appropriate methodologies. Our engineers also have extensive experience conducting a LOPA and SILs determination after performing a PHA.

Our engineers can use any of these hazard evaluation techniques to assist clients in identifying hazards with their processes and systems, regardless of whether such analysis is required by local regulations, internal company requirements or recent incidents.

Practical Experience Evaluating Hazards

We have extensive practical experience developing and applying hazard evaluation methods in all process industries and can advise on the following:

PHA Program Assessment Development Upgrades

We have helped numerous clients assess and upgrade (or develop) their PHA and PHA revalidation programs to meet their regulatory and internal requirements. This includes PHA program/protocol reviews and audits, as well as requests for a detailed review a specific PHA report(s) for regulatory and technical robustness.

Additionally, we have experience evaluating the hazards of new concepts, new designs, operating units, mothballed units and units being repurposed or demolished. We have also helped clients make key risk decisions based on those reviews.


Combining Hazard Evaluation Procedures

Combining Hazard Evaluation Procedures

We routinely combine hazard evaluation methods to most efficiently meet our customer's objectives. In addition to common qualitative analysis combinations, such as What-if/Checklist, we often combine qualitative methods with quantitative methods, such as LOPA, to achieve specific objectives. We have implemented this in our LEADER™ software to accommodate/encourage the use of combined methods (what-if/checklist/ HAZOP/LOPA) in PHAs. In addition, we participated in the writing of the CCPS book on LOPA, routinely perform LOPA studies for clients, and teach classes in the LOPA technique.


Special Topic Analyses

We have written and contributed to industry guidance on human factors for improving performance in process industries and human factors are included in our hazard evaluations. Similarly, we helped write API RP 752/753/756 guidance regarding siting of process plant buildings (including portable buildings) and have conducted facility siting studies for hundreds of companies to help contribute to PHAs. Thus, we have always included human factors and facility siting reviews in PHAs for clients, and we include those topics when we teach PHA leadership skills and in our specific classes on human factors and facility siting.


Hazard Reviews for MOC and PHA Revalidations

Hazard Reviews for MOC and PHA Revalidations

We wrote Guidelines for Management of Change for Process Safety for CCPS, frequently lead MOC reviews for clients, and teach classes in hazard analysis techniques for MOC. And we know that having an effective MOC program is an integral part of being able to effectively manage hazards and conduct PHA revalidations at five-year intervals as required by OSHA's PSM and EPA's RMP regulations. Thus, we have helped clients develop their PHA revalidation program to emphasize the importance of effectively implementing and documenting their MOC program.


LEADER PHA Software Solution

LEADER PHA Software Solution

For more than 25 years, our LEADER™ PHA software has provided an efficient, cost-effective solution for conducting comprehensive hazard analyses that comply with OSHA and EPA requirements. When used frequently for MOC reviews and pre-startup safety reviews, the software allows plant personnel to meet company standards and regulatory requirements in the shortest time available, helping to optimize both efficiency and performance. Learn why LEADER is the right platform for documenting PHAs using HAZOP, What-if/Checklist, FMEA and LOPA to meet your organization's safety, risk and compliance needs.

Discover Our LEADER Software Solution


Our PHA Philosophy

Even though we are accomplished experts, we know how to listen to our clients, understand their needs and find creative ways to meet those needs.

We are not rigid thinkers. We are creative, risk-related technical problem solvers. Even though we have considerable technical expertise, we know that the methods described in industry and regulatory guidelines can be implemented in a variety of ways. We first seek to understand our clients' needs, objectives and culture. Then we produce the highest quality product possible with input from the clients' personnel and our project team members' expertise. We recognize that one aspect of our role is distilling best practices and documenting them in a way that will be most useful to your company or organization's culture.

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