When Is It Acceptable to Deviate From a Maintenance Schedule?

In earlier posts I explained the power of planning and scheduling, and I outlined six principles that make planning truly effective. The last two articles focused on scheduling as a key productivity lever and introduced the first principle: the need for a planned backlog. In this installment, I’ll explore the second principle—recognizing that both the schedule itself and the priorities of individual work orders are critical.

At first glance, “schedules and priorities matter” might seem obvious, yet many organizations treat it as a given. In reality, scheduling is a pragmatic framework built on common sense. Let’s examine how neglecting these elements can cripple productivity.

Maintenance’s primary mission is to keep equipment running. However, when equipment fails, the team often shifts into a reactive mode, treating restoration as the core role. This mindset breeds two problematic behaviors:

• Maintenance crews rush to urgent jobs—those visible to everyone—while rarely tackling lower‑priority work that could prevent future emergencies.
• Operators classify maintenance needs into only three tiers: “Now,” “Tomorrow,” or “Never.” Consequently, they may fabricate urgency or delay reporting until the problem escalates.

Even when extra time exists between urgent tasks, crews hesitate to start lower‑priority jobs, fearing they’ll be interrupted by a new emergency. This hesitation creates a vicious cycle: limited visible work keeps everyone busy but leaves critical preventive tasks undone.

A structured schedule forces maintenance to engage in lower‑priority jobs, ensuring a steady flow of “enough” work. This continuity is the cornerstone of productivity. Moreover, well‑planned schedules help avoid interruptions. If a new task can wait until next week, it can be slotted into that week’s plan. If it can wait until tomorrow or later in the week, it won’t disrupt today’s commitments. Even a task that can wait until the end of the day can be pre‑scoped and prepped, giving technicians a clear start point. The safest scenario is to finish an ongoing job before taking on a new one, eliminating mid‑task disruption.

To curb false emergencies, management must champion the schedule and priority system. Each crew should begin the week with a defined workload goal. Supervisors should be empowered to challenge the urgency of new requests, asking operators how long a task can realistically wait and then incorporating it into the schedule appropriately. When a job truly cannot be delayed, crews must be allowed to respond—breaking the schedule is justified only for genuine priority work. Additionally, encourage operators to report lower‑priority items promptly, reducing the backlog of unseen tasks.

Once maintenance teams commit to a weekly schedule, the fear that low‑priority work will never get done diminishes, and the abuse of the priority system naturally declines. Experience shows that starting each crew with a week’s worth of planned work—and allowing supervisors to intervene when priorities shift—dramatically boosts both the volume and relevance of completed maintenance.

Doc Palmer, the author of the Maintenance Planning and Scheduling Handbook, is a Certified Maintenance & Reliability Professional (CMRP) with nearly 25 years of industrial experience. From 1990 to 1994, he overhauled the maintenance planning organization of a major electric utility, a transformation that extended planning to all crafts and stations within the company.