Please see the first entry of the Requirements Management blog series here.
The concepts of allocation and derivation are sometimes misunderstood when it comes to requirements management. This can lead to confusion and even to safety problems. The process of derivation involves the writing of a new requirement, …
With the appearance of malware and nation state attacks on Industrial Control Systems (ICS), such as the Stuxnet (2010), Industroyer (2016) and TRITON (2017) attacks, the IEC 62433 standards are gaining wider attention.
While the potential targets to attack in an ICS system are many-fold, one plant asset that…
How many development teams have heard those few, innocent words uttered from Marketing/Management toward the end of the development phase of a project, only to have their schedule blown out of the water? The phase of development into which the change is introduced determines the size of the concentric…
Mechanical CAD and electronic schematic capture tools have been around much longer than graphical software tools. This is primarily because physical objects are more naturally represented as components in a computer-aided design program, and it was more obvious how to design those technologies at the time. The “soft” in…
Part 1 of this blog entry discussed software modeling, modeling notation, and modeling tools. But, what does this have to do with Functional Safety? The IEC 61508 standard has requirements, for certain SIL levels, regarding the use of:
Please see the first entry of the Requirements Management blog series here
Please see the second entry of the Requirements Management blog series here
So, you have a set of detailed safety requirements. You have derived them down to a level of detail you feel spells out…