Plants Complete Only 54% of Scheduled Maintenance. The Rest Becomes Reactive Risk

Every plant has a preventive maintenance schedule, and most plants believe in it. The question is how much of it actually gets done. A new survey of maintenance teams puts the answer at a little over half, and the work that slips does not disappear. It returns as unplanned stoppages, emergency call-outs and repairs carried out under time pressure, which is exactly when the procedures that keep technicians safe are most likely to be shortened.

Half the Plan, Most of the Breakdowns

Limble's first State of Maintenance Report, released on October 7, surveyed 686 full-time U.S. employees in maintenance and operations between July 29 and August 6, across manufacturing, wholesale and distribution, infrastructure, facilities-intensive services and the public sector. Leaders estimate their teams complete just 54% of scheduled preventive maintenance. Nearly half, 47%, report more than 10 hours of unplanned downtime in a typical month, and 40% put their annual downtime costs at $100,000 or more.

The reasons are not a mystery to the people doing the work. In Manufacturing Dive's coverage of the report, staffing shortages ranked as the biggest obstacle, followed by ageing equipment, budget constraints and "too much reactive work." That last item is the trap. Every skipped inspection makes the next unplanned failure more likely, every unplanned failure pulls technicians away from the schedule, and 61% of respondents said their current maintenance approach increases the risk of unplanned downtime, higher costs and safety issues.

The pattern is not unique to one survey. Fluke research published last October, based on more than 600 senior decision-makers and maintenance professionals in the United States, the United Kingdom and Germany, found that 61% of manufacturers had suffered unplanned downtime in the previous year, at an estimated cost to the sector of up to $852 million a week.

Where the Hours Actually Go

The more revealing numbers are about time on the tools. More than 60% of leaders and technicians in the Limble survey estimate that hands-on maintenance takes three hours or less per shift. Some 48% of frontline technicians lose at least an hour waiting for approvals or site access. A schedule can be perfectly sensible and still fail if the people assigned to it spend most of the shift chasing permits, parts and information.

Information is a large part of the drag. 82% of respondents say their organisation owns and operates a computerised maintenance management system, yet only 39% report consistent use across the whole team, and 71% have asked a colleague for information the system already holds. Knowledge sits in people rather than records: 74% have at least one critical asset that only one staff member knows how to fix, and 47% say their organisation has lost knowledge it could not recover when someone left.

"Most maintenance teams aren't short on technology. They're short on time and information they can trust," said Gary Specter, chief executive of Limble. More than half of teams are already using or piloting AI, but 92% agree it needs good, complete maintenance data to work, and the report's own conclusion is that teams have to fix how maintenance work gets recorded before AI can do much with it.

Reactive Work Is Where the Safety Risk Concentrates

The cost of a missed preventive job is usually counted in lost output. The Limble data adds a second ledger: 65% of respondents say reactive maintenance puts technicians in higher-risk situations at least monthly. A planned job comes with a prepared isolation procedure, the right locks and tags and a time window agreed with production. A breakdown at the start of a night shift comes with a supervisor who wants the line back up.

OSHA's enforcement data shows how often that discipline breaks down. In preliminary figures for fiscal 2026, covering October 2025 to August 2026 and reported by Carrier Management, control of hazardous energy, the lockout/tagout standard, was the third most frequently cited standard across all industries, with 1,863 citations. Powered industrial trucks ranked seventh with 1,379 and machine guarding tenth with 1,072. The agency's hazardous energy guidance ties the standard directly to the servicing and maintenance of machines and equipment, and describes craft workers, electricians, machine operators and labourers as among the millions of workers who service equipment routinely.

The connection is practical rather than abstract. A plant that completes half its preventive schedule runs more of its maintenance as unplanned work, often with contractors called in at short notice, on equipment that may not have a current isolation procedure, under pressure that makes every step feel optional. The citations figure is one visible measure of what happens when that pressure wins.

What Operations Leaders Should Do Now

Raising preventive completion is rarely about adding tasks. It is about removing the friction that stops planned work from happening and making sure the work that does happen is properly recorded.

• Measure completion honestly: report the share of scheduled preventive work finished on time each week, by asset criticality, so the gap is visible to plant leadership rather than buried in a backlog count.
• Attack wrench-time losses first: map how long technicians wait for permits, approvals, parts and site access, and fix the slowest handoffs before hiring against a shortage that may partly be process.
• Make the system the only record: capture work, readings and fixes digitally at the asset, so the 39% consistent-use figure rises and the answers stop living in one person's head.
• Use condition data to trigger work: feed alarms and equipment readings from control systems into the maintenance plan, so inspections go where the signals point rather than where the calendar says.
• Pre-write isolation procedures for reactive jobs: keep current, equipment-specific lockout steps for every critical asset, so a breakdown never becomes the moment a procedure is improvised.
• Hold contractors to the same standard: qualify outside crews on energy-control training and safety performance before an emergency, because that is when there is no time to check credentials.

A preventive schedule that is only half delivered is not a plan. It is a forecast of the breakdowns to come, and of the rushed, higher-risk repairs that follow them. The plants that close the gap will do it by giving technicians back their time and trusting the record of what was actually done.