I agree with hm243 that a reevaluation has more benefits than pitfalls when observing the various location of equipment use. However when multiple locations are set and frequent then a complete evaluation may not be necessary. If the equipment is evaluated each time the location is placed with proper results and the same performance then an IQ/OQ/PQ may not be needed every time a change occurs. I do not know how practical this approach is but can be effective.