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Which parameter should be recorded alongside a network log?

  • A.The conditions under which the fault occurred
  • B.The vehicle mileage only, which identifies the point in the life of the vehicle at which the fault was recorded
  • C.Nothing
  • D.Temperature, vibration, road conditions and any driver action, since these often correlate with an intermittent fault

Answer: A

Correlating the disturbance with a bump, a temperature or a switch operation points straight at the cause. The last option lists exactly those conditions, which makes it a correct and more practical version of the same answer. Most errors here come from carrying across a result from a neighbouring case where it does not hold. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb.

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