Category: Safety Analysis

When Understanding Your Risk Assessment Standard, we need to know a few things. The standard is the thing that we’re going to use to achieve things – the tool. And that’s important because tools designed to do certain things usually perform well. But they don’t always perform well on other things. So we will ask, ‘Are we doing the right thing?’ And ‘Are we doing it right?’

This post is part of a series:

• Intro to System Safety Risk Assessment
• Start of System Safety Risk Assessment
• Hazard & Risk Basics (SSRAP Module 1)
• System safety risk analysis (SSRAP Module 2)

Video Highlights

Transcript

What and Why?

So, what will we do and why are we doing it? First, the use of safety standards is very common for many reasons. It helps us to have confidence that what we’re doing is good enough. We’ve met a standard of performance in the absolute sense. It helps us to say, ‘We’ve achieved standardization or commonality in what we’re doing’.

We can also use it to help us achieve a compromise. That can be a compromise across different stakeholders or different organizations. Standardization gives us some of the other benefits as well. If we’re all doing the same thing rather than we’re all doing different things, it makes it easier to train staff. This is one example of how a standard helps.

However, we need to understand this tool that we’re going to use. What it does, what it’s designed to do, and what it is not designed to do. That’s important for any standard or any tool. In safety, it’s particularly important because safety is, in many respects, an intangible. This is because we’re always looking to prevent a future problem from occurring. In the present, it’s a little bit abstract. It’s a bit intangible. So, we need to make sure that conceptually what we’re doing makes sense and it’s coherent. That it works together. If we look at those five bullet points there, we need to understand the concept of each standard. We need to understand the basis of each one.

They’re not all based on the same concept. Thus, some of them are contradictory or incompatible. We need to understand the design of the standard. What the standard does, what the aim of the standard is, and why it came into existence. And who brought it into existence. To do what for whom – who’s the ultimate customer here?

For risk analysis standards, we need to understand what kind of risks they address. Because the way you treat a financial risk might be very different from a safety risk. In the world of finance, you might have a portfolio of products, like loans. These products might have some risks associated with them. One or two loans might go bad, and you might lose money on those. But as long as the whole portfolio is making money, that might be acceptable to you. You might say, ‘I’m not worried about that 10% of my loans have gone south and all gone wrong. I’m still making plenty of profit out of the other 90%.’ It doesn’t work that way with safety. You can’t say ‘It’s OK that I’ve killed a few people over here because all this a lot over here are still alive!’. It doesn’t work like that!

Also, what kind of evidence does the standard produce? Because in safety, we are very often working in a legal framework that requires us to do certain things. It requires us to achieve a certain level of safety and prove that we have done so. So, we need certain kinds of evidence. In different jurisdictions and different industries, some evidence is acceptable. Some are not. You need to know which is for your area. And then finally, let’s think about the pros and cons of the standard. What does it do well? And what does it do not so well?

System Safety Pedigree

We’re going to look at a standard called Military Standard 882E. This standard was first developed several decades ago. It was created by the US government and military to help them bring into service complex, cutting-edge military equipment. Equipment that was always on the cutting edge. That pushes the limits of what you can achieve in performance.

That’s a lot of complexity. Lots of critical weapon systems, and so forth. So they needed something that could cope with all that complexity. It’s a system safety engineering standard. It’s used by engineers, but also by many other specialists. As I said, it’s got a background in military systems. These days, you find these principles used pretty much everywhere. So, all the approaches to System Safety that 882 introduced are in other standards. They are also in other countries.

It addresses risks to people, equipment, and the environment, as we heard earlier. And because it’s an American standard, it’s about system safety. It’s very much about identifying requirements. What do we need to happen to get safety? To do that, it produces lots of requirements. It performs analyses of all those requirements and generates further requirements. And it produces requirements for test evidence. We then need to fulfill these requirements. It’s got several important advantages and disadvantages. We’re going to discuss these in the next few slides…

This is Module 3 of SSRAP

‘Understanding Your Risk Assessment Standard’ is Module 3 of the System Safety Risk Assessment Program (SSRAP) Course. Risk Analysis Programs – Design a System Safety Program for any system in any application.

The full course comprises 15 lessons and 1.5 hours of video content, plus resources. It’s on pre-sale at HALF PRICE until September 1st, 2024. Check out all the free preview videos here and order using the coupon “Pre-order-Half-Price-SSRAP”. But don’t leave it too long because there are only 100 half-price courses available!

Meet the Author

Learn safety engineering with me, an industry professional with 25 years of experience. I have:

•Worked on aircraft, ships, submarines, ATMS, trains, and software;

•Tiny programs to some of the biggest (Eurofighter, Future Submarine);

•In the UK and Australia, on US and European programs;

•Taught safety to hundreds of people in the classroom, and thousands online;

•Presented on safety topics at several international conferences.