Factory's electricity consumption jumped 25% overnight

What we told them

A jump that lands overnight and then holds steady is almost never a gradual efficiency loss — it is something that switched on and stayed on. Log consumption at fifteen-minute intervals for one week and overlay it on the shift calendar. In this case the baseline load at 3am had tripled: a compressor was cycling continuously because a leak downstream kept pressure below the cut-out threshold. The compressor was doing exactly what it was told to do; the leak was the fault. Fix the leak before replacing any equipment.