When seasonal production ramps up, preventive maintenance is often one of the first activities to get postponed. Emergency repairs, staffing shortages, overtime demands, and tight busy season production schedules can quickly push routine inspections and service work to the bottom of the priority list.
While delaying maintenance during busy season may seem unavoidable, allowing deferred maintenance to accumulate increases the likelihood of equipment failures, costly downtime, and larger maintenance backlogs later. Before long, routine inspections and scheduled service are delayed, creating a growing preventive maintenance backlog that increases operational risk.
While some backlog is healthy, even expected, allowing it to grow unchecked can reduce equipment reliability, increase emergency repairs, and create safety concerns. The key isn’t eliminating every pending work order. It’s knowing how to prioritize work, allocate resources effectively, and prevent routine maintenance from turning into costly downtime.
Which options will work best for maintenance backlog management depends on your facility’s equipment types, environment, workflows, and failure risk. Facilities operating continuous-process systems, often require different backlog strategies than discrete manufacturers or distribution centers. Understanding what is recommended for your operations starts with measuring backlogs accurately and managing it strategically.
Advanced Technology Services (ATS) can help organizations find the right balance in their maintenance backlog management, especially during busy seasons. Talk with an ATS expert to see what’s recommended for your facility if you’re unsure whether your current backlog represents a healthy workload or an increasing operational risk.
Why maintenance backlogs matter
A maintenance backlog is more than a list of unfinished work orders; it’s an indicator of maintenance capacity, asset health, and organizational risk. When planned work continues to accumulate, technicians spend more time responding to breakdowns instead of completing scheduled inspections and repairs. This shift often creates a cycle where equipment reliability declines, generating even more emergency work.
Growing backlogs can affect:
- Equipment uptime and production output
- Employee safety and regulatory compliance
- Asset life expectancy
- Maintenance labor efficiency
- Budget predictability
Maintenance leaders should view backlog trends as an early warning signal. If the backlog continues growing despite steady staffing levels, the issue may involve planning, scheduling, spare parts availability, or an increasing reactive workload rather than simply lacking technicians.
What is a maintenance backlog?
Simply put, a maintenance backlog is the total amount of approved maintenance work that has not yet been completed.
This includes all pending maintenance tasks, such as:
- Scheduled inspections
- Lubrication routes
- Equipment adjustments
- Preventive replacement activities
- Planned repairs
- Follow-up corrective work
- Improvement projects
Not all backlog items carry the same level of urgency. A preventive maintenance backlog consists of scheduled maintenance activities that were planned but delayed. Corrective backlog includes repairs that have already been identified after an issue has been discovered but have not yet been completed. Understanding the difference helps maintenance teams prioritize work based on operational risk rather than simply addressing the oldest work orders first.
What Is preventive maintenance?
Preventive maintenance refers to planned maintenance performed before equipment fails. These activities follow time-based, usage-based, or condition-based schedules designed to reduce breakdowns and extend equipment life. Some examples are routine inspections, oil and filter changes, belt replacements, bearing lubrication, calibration, and cleaning critical components.
A strong preventive maintenance program reduces emergency repairs by identifying issues before they become failures. Regular inspections also improve asset reliability while helping facilities maintain higher preventive maintenance compliance throughout the year. When routine work is repeatedly postponed, deferred preventive maintenance often becomes the primary driver of future reactive maintenance.
How to calculate maintenance backlogs
Backlog should be measured in weeks, not simply by counting work orders.
Standard formula
Maintenance Backlog = Total Labor Hours of Approved Work ÷ Weekly Productive Maintenance Capacity
Illustration
- Approved work orders = 640 labor hours
- Maintenance staff = 8 technicians
- Weekly hours = 40 each
- Total available hours = 320
- Productive wrench time = 60%
Actual productive capacity: 320 × 0.60 = 192 productive hours.
Backlog: 640 ÷ 192 = 3.3 weeks.
A healthy backlog generally falls between two and four weeks of planned work. Less than two weeks may indicate under-planning, while more than four weeks often signals capacity constraints or planning inefficiencies. Some organizations also monitor a backlog ratio. A ratio near 1 generally indicates maintenance demand and available capacity remain balanced.
Common causes of backlog growth
Several operational issues contribute to increasing backlog.
Staffing and capacity constraints
Hiring shortages, overtime fatigue, retirements, or expanded production schedules can reduce available maintenance capacity.
Poor planning
Incomplete job plans, unclear work instructions, or missing labor estimates slow execution and reduce technician productivity.
Missing parts
Waiting for replacement components remains one of the most common reasons planned work gets delayed. Without proper inventory management, even simple repairs may wait weeks.
High reactive workload
Frequent emergency repairs consume labor that would otherwise complete scheduled maintenance. Rising reactive work is often an early indicator that reliability is declining.
Poor data quality
Duplicate work orders, outdated requests, inaccurate labor estimates, and work that has already been completed but never closed all inflate backlog numbers and reduce planning accuracy. Regular backlog reviews help identify these operational issues before they become chronic.
How to tackle backlogs during busy season
The first step in tackling maintenance during busy season is understanding what has been delayed and determining which maintenance activities require immediate attention. Rather than scheduling work based solely on how long it has been overdue, evaluate each maintenance task according to operational risk.
Using a simple risk-scoring system allows maintenance teams to focus first on assets that pose the greatest operational risk. A compressor supporting an entire production line deserves attention before a lightly used conveyor, even if the conveyor’s preventive maintenance is older.
Conduct a preventive maintenance backlog review
Busy seasons often generate duplicate work orders, outdated requests, or maintenance tasks that have already been completed during emergency repairs. Before assigning technicians, perform a backlog review to clean up the schedule. Reducing unnecessary work helps technicians spend more time performing maintenance instead of sorting through administrative clutter.
Separate planning from scheduling
Once priorities have been established, ensure every maintenance task is properly planned before it is scheduled. Effective planning includes labor estimates, required procedures, spare parts, specialized tools, and safety requirements. Scheduling then determines when maintenance tasks will occur, technician assignments, coordination with production, and available maintenance windows. Preparing work packages before technicians begin reduces delays and allows limited maintenance windows to be used more efficiently.
Break large tasks into smaller work packages
During busy season periods, finding several uninterrupted hours for maintenance can be difficult. Instead of waiting for the perfect shutdown window, divide larger preventive maintenance activities into smaller phases that can be completed during shift changes, planned pauses, or short production breaks. This approach helps prevent maintenance tasks from falling further behind while minimizing disruptions to operations.
Assign clear ownership for recovery
Recovering from deferred preventive maintenance requires accountability across the maintenance organization. Maintenance planners should build complete job packages and ensure parts are available before work begins. Schedulers should coordinate maintenance windows with operations and balance technician workloads realistically.
Supervisors should review preventive maintenance compliance weekly, monitor backlog growth, and remove scheduling obstacles before they become larger problems. Cross-training technicians can further improve flexibility by allowing routine preventive maintenance work to continue even when specialized personnel are assigned to emergency repairs.
Develop a busy-season recovery plan
When preventive maintenance has fallen significantly behind, avoid relying solely on overtime to catch up. A structured recovery plan typically produces better long-term results.
Effective recovery strategies include:
- Eliminating duplicate and obsolete work orders
- Prioritizing high-risk assets first
- Creating dedicated PM recovery crews
- Using qualified contractors for specialized maintenance
- Completing overdue work during planned production downtime
- Reviewing backlog metrics every week
Focusing on the highest-risk maintenance tasks first improves equipment reliability much faster than attempting to complete every overdue preventive maintenance in chronological order.
Prevent the backlog from growing further
While catching up is important, preventing additional delays should happen simultaneously. Maintain adequate inventories of critical spare parts, prepare maintenance kits before scheduled work begins, and review supplier lead times regularly. Many preventive maintenance tasks are delayed not because technicians are unavailable, but because parts or tools are missing when work is scheduled. Tracking preventive maintenance compliance, backlog weeks, technician utilization, and the ratio of planned versus reactive maintenance can also provide early warning signs before deferred maintenance becomes unmanageable.
Consider predictive maintenance for critical assets
If staffing limitations make it difficult to complete every scheduled preventive maintenance during peak seasons, predictive maintenance can help prioritize resources. Technologies such as vibration analysis, infrared thermography, oil analysis, and ultrasonic testing allow maintenance teams to monitor equipment condition and identify assets that truly require immediate attention. Combining preventive and predictive maintenance enables organizations to focus limited labor on the equipment most likely to fail, reducing unnecessary maintenance while improving reliability.
Get additional support when needed
If preventive maintenance continues falling behind despite internal efforts, outside support may be the fastest path to recovery. Contract maintenance providers can help eliminate accumulated preventive maintenance work, perform predictive inspections, and supplement maintenance staffing without disrupting daily operations. Partnering with experienced maintenance specialists, such as ATS, can help improve maintenance backlog management.
ATS supports organizations by providing specialized inspection, calibration, maintenance, and repair services that help keep critical equipment operating reliably. Talk with an ATS expert to learn what is recommended for your operations.
