Because of the harsh operating environment in many oil fields, equipment availability can be well below optimum. While in the Gulf of Mexico the same unit has breakdowns weekly and major overhauls every 18 months to 2 yrs. Discipline in the workplace in the Alaska facilities that we did not see in the Gulf - equipment was properly restored, religiously maintained, and operated according to good reliability practices. We have all been in plants where there is a complacent attitude about equipment maintenance and reliability. Equipment is expected to fail.
Maintenance is primarily reactive.
Spare parts are stored in conditions that significantly reduce their useful life. People often ignore the early warning signs of pending failure. These all represent a lack of discipline in the workplace. TPM requires leadership to be effective from the start. Seems easy enough to correct.