Definition
A set of planned activities intended to keep equipment and systems in a condition that supports reliable and safe operation.
Human Explanation
Regular servicing reduces the likelihood of failures and unplanned downtime.
Why it Matters
Preventing failures is usually more effective and less costly than correcting their consequences.
Conceptual Boundary
Preventive Maintenance does not replace Qualification or Validation; it helps preserve the state they established.
Practical Perspective
A programme should define justified intervals, inspection and replacement activities, responsibilities and controlled records.