I agree with your justification but to take a step further, I believe the reevaluation should be done as often as possible. Granted a full reevaluation can be costly and unnecessary but it can be preventative for future issues. Just how reevaluations are done at specific time intervals and during recalibrations, I also think that it should be done as the user of the device changes. Again not as the full scale, but a smaller set of evaluations that can ensure proper function with each user. Also, a revolution of the setting and space around machinery should be done.