Making it rain on his employees…like a boss would do…(eye roll) He should have distributed the money evenly and placed it in an envelope like a normal respectful human being.

The normal consolidation line, the critical state line and the strength envelope line are determined from the laboratory tests, and equations of these lines are given.

At first the cepstrum envelope model is described. Then the vibration spectra of the normal pump and the pump with a bearing failure are compared in frequency domain and in cepstrum envelope domain.