Maintenance and service-related items are often the second-largest budget element in a laboratory after salaries and benefits. Within maintenance, preventive maintenance (PM) is a substantial portion of the budget. Traditionally, PM was an equipment maintenance philosophy based on replacing, overhauling or remanufacturing a piece of equipment at fixed intervals, regardless of its condition at the time. In essence, it involved fixing something that wasn't necessarily broken and this approach is still widely used in the pharmaceutical industry.
