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Entries tagged with: Dr. William Goble

Does Everyone Really Ignore Failure Rates?

Does Everyone Really Ignore Failure Rates?

While discussing functional safety certification of an integrated valve assembly with a manufacturer, exida stated that all devices (actuator, pneumatic parts, valve, etc.) must be IEC 61508 certified. The manufacturer said this was no problem, and provided a set of exida and TÜV certificates. 

Of…

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How Does the IEC 62443 Cybersecurity Standard Apply to Integrators?

How Does the IEC 62443 Cybersecurity Standard Apply to Integrators?

The IEC 62443 series of cybersecurity standards include over ten documents covering various subjects. Buying a full set is a bit expensive, but for me the real cost is the time needed to read and understand them. So I often ask one of the experts at exida…

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How Much Cybersecurity Do I Need?

How Much Cybersecurity Do I Need?

During an IACS cybersecurity risk analysis, each zone of a network is given a target security level. The levels are one to four, with one being the least amount of protection and four giving the most protection. For each zone we ask, “How much cybersecurity protection do we…

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