Michael Karas wrote:
The old school concepts of doing full BIT (built in tests) for computer systems is not particularly applicable to embedded microprocessor systems. I know the opinion is shared by others as I see from several posts before this one.

I agree with this and point out that the processor is often only a component of a system such as a medical or laboratory instrument. In these cases I use 'sanity' tests in the software which check on the attached sensors. Things such as inputs hitting max/min etc., or not reporting when querried.

The controller is one thing, the system is another.