Poorly planned work orders, long waits for parts, and chronic equipment failures drain uptime and budget. Lean hunts wasted motion and queue time; Six Sigma hunts variation and repeat failures.
- 5S the parts crib — clear labels, fixed locations, zero search time.
- Value-stream map work-order flow — expose waits between request, approval, and execution.
- Kanban for spare-parts levels — visual reorder points stop stock-outs.
- Obeya wall — one screen for MTBF, MTTR, backlog, and today’s blockers.
Six Sigma Methods for Maintenance Metrics
| Metric | Track | Why It Helps |
|---|---|---|
| Overall Equipment Effectiveness (OEE) | Availability × Performance × Quality | One-number health check |
| Mean Time Between Failure (MTBF) | Operating hours ÷ failures | Predicts asset reliability |
| Mean Time to Repair (MTTR) | Downtime ÷ repairs | Shows maintenance speed |
| Planned-vs-unplanned work | % tasks planned | Higher planned % means fewer surprises |
DMAIC gives each metric a roadmap from baseline → root cause → improve → control.
Lean Six Sigma in Maintenance & Facilities: Quick Wins & Real Stats
- Condition-monitoring sensors + Kanban parts kits removed 40 % of unplanned downtime.
- 5S + TPM checks pushed OEE from 50 % to 68 %.
- Root-cause blitz on starter-motor failures shrank MTTR 110 → 10 min (-91 %).
- DMAIC overhaul line cuts repair cycle 36 %, saving $956 k a year.
Lean Six Sigma in Maintenance & Facilities: Step-by-Step Start-Up
- Pick one pain point — MTTR or downtime is easy to measure.
- Map the current flow — every request, wait, and part pickup.
- Label steps as value-add, required, or waste; remove pure waste.
- Baseline the numbers — hours, %, $, sigma level.
- Analyze causes — 5 Whys, Pareto, FMEA.
- Pilot fixes — one asset class or one building.
- Control — SOPs, dashboards, weekly audits.
Lean Six Sigma in Maintenance & Facilities means fewer breakdowns, faster repairs, and higher asset productivity. Start with one metric, remove waste, reduce variation, lock the gain, repeat.
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