If you’re like me then you’ve been waiting for the new draft of IEC 61511 to be officially issued since its release has been delayed for some time. However, a draft has been released and can help in preparing end users for what’s to come. The question…
One of the changes that was made in 2016 to the IEC 61511 standard was the inclusion of periodic personnel assessments (clause 5.2.2.3), whereby a procedure is required to manage the competence of all those involved in the SIS lifecycle; “periodic” assessments are to be carried out to document…
I don’t know whether you’ve noticed recently, but the number of cybersecurity alerts issued by CISA (Cybersecurity and Infrastructure Security Agency) seems to be increasing at an alarming rate. The latest alert I’ve seen now relates to GPS tracking systems for children. A device which is supposed to keep…
It always amazes me that when teaching our FSE 100 Functional Safety Engineering course, the number of times I find that end users in the class are not really measuring the performance of their SIS. In most cases, they are doing some measurements, but not thoroughly.
It…
When speaking with several manufacturers’ sales teams recently, it became very evident that some of these sales people, selling into the Industrial Safety and Controls markets, had little or no knowledge of how their products’ failure rate data compared to their competitors and/or another industry benchmark (such as DOW…
I was reading an incident report on the Chemical Safety Board (CSB) website the other day, where it was the conclusion of the reviewing team that the incident (which sadly resulted in a loss of life) was the direct result of a poor safety culture across the…
Those operating in the process world should be familiar with the concept of Functional Safety Management (FSM) and the need to have well defined processes and procedures in place. Otherwise, how else will they be able to ensure that their Safety Instrumented System (SIS) and plant…
As an end-user, do you know how reliable and safe your Safety Instrumented Systems (SIS) and Basic Process Control Systems (BPCS) are from potential cyber issues? Do you rely on your vendor statements regarding the robustness of their products? If the answer to these questions is “don’t know”…
As the cybersecurity threats in the industrial world continue to rise, the automation world continues to grapple with how to address these issues. As such, the newly released IEC61511-1: 2016 edition has included a new clause to address this (Clause 8.2.4). In essence, End Users have to carry out…
I am often asked whether extending proof test intervals will be a problem.
This is a tricky question. The design and engineering SIL calculations for the Safety Instrumented Functions (SIFs) are taking credit for a specific proof test interval with a defined level of coverage, as defined within the…
Some of you reading this may not be aware or familiar with the terms “leading” and “lagging” indicators, when applied to Functional Safety. The concept isn’t new but does provide significant benefit when applying this to Functional Safety because, if used correctly, these indicators can help significantly improve performance. …
It’s an interesting question and one I asked myself. For any engineer and/or professional working in the controls business or process industries where safety-related equipment is required, it is essential (per IEC61511-1 Clause 5.2.2: Organization and Resources) to prove competency to carry out any safety-lifecycle activities. So what does…
I'm sure you are aware of the preliminary findings of the Philadelphia Energy Solutions (PES) Refinery explosion. If not, have a look at the video below. It is very interesting, but sad. I think we all can learn a lot from it.