INSTALLED INSTRUMENTATION MAINTENANCE METHOD

The present invention's efficient and economical maintenance strategy for a system of operation (such as involving various kinds of instrumentation) features a unique decision-making logic that incorporates reliability-centered maintenance principles. The initial logical inquiry filters out the non-critical cases, i.e., those instruments the failure of which does not jeopardize or compromise safety, or the environment, or an important function or operation. The logical construct proceeds as to the remaining (unfiltered) instruments in a series of logical steps wherein the satisfaction of one or more given conditions by a subject instrument directs the practitioner to the appropriate maintenance action for the subject instrument. Possible maintenance actions include the following: comparison check of the instrument with respect to the primary instrument; system operational check; repair of the instrument; replacement of the instrument; maintenance deferral until a scheduled failure finding task; system calibration procedure; individual maintenance procedure (on-site or off-site).