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Discussion

A relevant variable in an energy review is one that

  • A.the organisation is unable to measure
  • B.changes only on those occasions when the process is modified
  • C.is fixed by the tariff structure
  • D.routinely affects consumption, such as production or weather

Answer: D

Consumption normalised against the variables that genuinely drive it isolates the performance from the circumstances, which is what makes month-to-month comparison possible. Degree days and production volume are the two commonest.

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