Conformity assessment of embedded systems

Compliance with specifications

Measuring & testing embedded systems

Two distinct approaches to the testing and measurement of embedded systems can be identified:

  • choice of a measurement system (instrument, method, etc) suitable for testing an embedded system against specifications
  • characterisation of an embedded system as though it were a measurement system in order to increase understanding of how the embedded system functions and its principal limitations

Measurement uncertainty

Any measurement, be it quantitatively of a hard fault or a more subjective judgement of a soft fault, will not be perfect. Limited time and resources to make the measurement will lead to a number of measurement errors which are not evaluated or compensated for. The resulting measurement uncertainty needs to be evaluated.

Decision-making, risks & costs

When making a decision about compliance of an embedded system with a specification limit, any measurement uncertainty will lead to a certain risk that incorrect decisions of conformity will be made.

Finally, these decision risks need to be evaluated, not only in terms of % supplier respective consumer risk, but also in impact terms (cost, danger etc)

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