The Maintenance Scheduling Benchmark
What separates world-class maintenance scheduling from the spreadsheet grind most plants still live in, and the numbers that prove it.
Most plants don’t have a maintenance problem. They have a scheduling problem.
Maintenance teams invest heavily in their CMMS or EAM, then schedule the actual week in exported spreadsheets. The result is predictable: planning in SAP or Maximo and scheduling in Excel costs the average scheduler more than five hours every week, before a single wrench is turned.1
That lost time is not the real cost. The real cost is what poor scheduling does to the whole crew: low schedule compliance, reactive firefighting, and technicians who spend most of their shift on everything except hands-on work. The benchmarks below show how wide the gap is, and how much is recoverable.
Four benchmarks every maintenance leader should know
| Measure | Typical plant | World-class | Source |
|---|---|---|---|
| Wrench time (hands-on) | 25 to 35% | 55 to 65% | SMRP / Reliable Plant2 |
| Schedule compliance | ~50 to 60% | 90%+ | SMRP / Allied Reliability4 |
| Planned vs reactive work | ~50 to 60% planned | 85 to 90% planned | SMRP / Limble5 |
| Time to build the weekly schedule | hours to days | under 1 hour | Sockeye case data6 |
Note on definitions: SMRP counts work as “proactive” only when the order was in the CMMS at least seven days before execution, a stricter test than a simple planned/unplanned split.5
One planner can add the output of 17 technicians, without hiring
The most cited finding in maintenance planning is also the most striking. When proper planning and scheduling raises hands-on wrench time from about 35% to 55%, productivity rises by roughly 57%. A 30-person crew then performs the work of 47 people.3
The lever is not working harder. It is removing the waiting, the searching, the travel, and the rework that planning and a reliable schedule eliminate.
Unplanned work is the most expensive way to run maintenance
Reactive work is not just riskier, it is structurally more expensive: emergency jobs pull in overtime, expedited parts, and lost production. A reliable forward schedule is the mechanism that moves work from the reactive column to the planned one, where it costs far less.
The same CMMS, a better schedule
World-class maintenance teams rarely have better software than everyone else. They have a better scheduling process layered on top of it:
- The week is built from the system of record, not rebuilt by hand in a spreadsheet.
- Real-time technician availability (shift, leave, skills) is visible while scheduling, not discovered on Monday.
- The schedule is locked and protected, so compliance can reach 90% and above.
- Every change is captured for a verifiable audit trail.
- KPIs like schedule compliance are generated automatically, not assembled by hand.
The one-hour benchmark. AV Group (part of Aditya Birla), running on IBM Maximo, went from a five-day weekly scheduling process to under one hour with Sockeye, a 90% reduction, while keeping Maximo as its system of record.6
How does your plant compare?
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Every figure in this report is drawn from a published industry source. Where a benchmark is an accepted industry range rather than a single study, the range and its supporting sources are shown.
- Planning in SAP and scheduling in Excel costs schedulers 5+ hours per week. Sockeye, “SAP PM scheduling challenges.” getsockeye.com/blog/sap-pm-scheduling-challenges
- Wrench time benchmarks (25 to 35% typical, 55 to 65% world-class). SMRP best-practice consensus, summarized by Reliable Plant (“Facts About Maintenance Wrench Time”) and Prometheus Group (“5 Things You Need to Know About Measuring Wrench Time”), 2024 to 2025.
- Planner productivity: wrench time rising from ~35% to ~55% yields a ~57% gain, so 30 technicians do the work of 47. Richard “Doc” Palmer, Maintenance Planning and Scheduling Handbook, McGraw-Hill. palmerplanning.com
- Schedule compliance: world-class is 90%+ of scheduled work completed as planned; most plants run far lower. SMRP Best Practices; Allied Reliability, “Schedule Compliance: The Prime Work Management Metric.” alliedreliability.com/blog/schedule-compliance
- Planned vs reactive: 80/20 is the common target and 85 to 90% planned is world-class; SMRP’s proactive-work metric requires the order in the CMMS 7+ days before execution; the average plant runs about 50 to 60% planned. SMRP Best Practices; Limble, “Planned vs Unplanned Maintenance Ratio,” 2026. limble.com/blog/planned-vs-unplanned-maintenance-ratio
- Five days to under one hour, a 90% reduction in weekly scheduling time, at AV Group (Aditya Birla) on IBM Maximo. Sockeye case studies. getsockeye.com/case-studies
- Unplanned downtime costs approximately $260,000 per hour on average (up to $2.3M/hour in automotive), and $1.4 trillion per year (about 11% of revenue) across the Fortune Global 500. Siemens / Senseye, “The True Cost of Downtime 2024.” Siemens TCOD 2024 (PDF)
- Preventive maintenance saves an estimated 12 to 18% over a reactive program. US Department of Energy / PNNL, Operations & Maintenance Best Practices Guide, Release 3.0. pnnl.gov/projects/om-best-practices