Edward M. Marszal

I have had yet another discussion today on what it means to put something [...]

During my trip to Houston (from Columbus, OH) last week as we were listening [...]

… Please don’t. I have recently put together a couple of presentations and a [...]

I am currently in Perth Australia at the IDC Technologies Safety Control Systems conference. As [...]

I am often asked the question, “Are permissives safety instrumented functions?”  I always respond [...]

Very frequently I run into situations where alarm rationalizations conflict with the results of [...]

For a significant amount of time now, end users of safety automation have been [...]

Certification of SIS components has received a level of respect among some practitioners of [...]

I’ve always found it hard to explain why a SIL 3 fire and gas [...]

Now that performance-based fire and gas system design is becoming more prevalent, knowledge of [...]

Dispersion modeling and fire and gas mapping are different activities, but are closely related. [...]

I was asked via e-mail what the difference between a PHA and a LOPA [...]

Another mistake that I commonly run into when reviewing HAZOP/LOPA studies (i.e., studies where [...]

So you’re probably wondering why I’ve posted a picture of my son with his [...]

As industry becomes more familiar with LOPA and more studies are performed, I frequently [...]

I have to say that I’m a little bit concerned over a large number [...]

Recently a question was posted on the ISA regarding what metrics are available for [...]

A lot of people have expended a lot of effort in calculating nuisance trip [...]

The publication of my Emerson Exchange presentation on the Emerson web site (see below) [...]

There is a lot of process safety management (PSM) software out there, and more [...]

Recently I was asked by a client to comment on the value of a [...]

For energize-to-trip (ETT) systems to operate, power must be available to take the safety [...]

I’m not sure why so many people are so intent to try to pound [...]