Full definition
A Work Order is a critical document in maintenance management that serves as an authorization for specific maintenance tasks. It can be generated in paper format or electronically through a Computerized Maintenance Management System (CMMS). The primary purpose of a work order is to ensure that maintenance tasks are clearly defined, tracked, and documented throughout the maintenance process. A comprehensive work order typically includes equipment identification, which specifies the asset number, name, and location of the equipment requiring maintenance. This identification is crucial for ensuring that maintenance personnel can quickly locate and address the issue at hand.
The work description within the order details precisely what needs to be accomplished, eliminating ambiguity. The priority section categorizes the urgency of the task, whether it is an emergency requiring immediate attention, urgent necessitating completion within 24 hours, routine tasks with a one-week window, or planned tasks aligned with the next shutdown schedule. This prioritization helps maintenance teams allocate resources effectively and respond promptly to critical issues.
Moreover, a work order outlines the necessary spare parts, including their part numbers, quantities, and availability status, ensuring that technicians have everything needed to complete the task. The labor section indicates the specific trade skills required, the estimated hours for task completion, and the technicians assigned to the task, which aids in labor management and accountability. Safety considerations are also a vital component, where permits, Lockout/Tagout (LOTO) requirements, personal protective equipment (PPE), and a Job Safety Analysis (JSA) or risk assessment are documented to ensure compliance with safety standards.
Timing elements in a work order specify the requested, scheduled, and due dates for the maintenance work. Finally, upon completion, the work order captures actual hours worked, parts utilized, findings from the maintenance task, follow-up recommendations, and the date of completion. By incorporating these elements, work orders not only facilitate planning and scheduling but also provide essential cost tracking, failure history for root cause analysis (RCA), compliance documentation, and key performance indicator (KPI) data, such as preventive maintenance (PM) compliance and mean time to repair (MTTR). The significance of a disciplined work order system cannot be overstated, as it is fundamental to effective maintenance management and is aligned with standards such as ISO 55000 for asset management.