Discipline in the hangar, the dry-dock, and the rebuild bay. Every hour the asset is on the ground is an hour it is not generating revenue.
MRO is a high-mix, variable-routing operation running against fixed asset return-to-service deadlines. The aircraft is on jacks, the locomotive is in the shop, the vessel is in the dry-dock, the turbine module is on the bench. Every depot, every hangar, every overhaul bay is a queue against an asset clock. Proudfoot has installed at depth in MRO operations for 80 years, across commercial aviation, defense sustainment, rail rolling-stock, marine refit, industrial rotating equipment, and capital-asset rebuild programs worldwide.
Results from Proudfoot client engagements in MRO
Where the value lives, and where it leaks.
MRO is the discipline of keeping high-value assets in service over a multi-decade economic life. An aircraft engine logs 25,000 flight hours between major overhauls; a locomotive runs 1.5 million kilometres between heavy maintenance events; a frigate cycles into refit on a planned 5-year rhythm; a gas turbine runs 24,000 hours between hot-section inspections. The asset is the revenue. Every hour it is on the ground is an hour it is not earning, and every day a return-to-service deadline slips is a day the operator is short an asset on the line.
Aircraft on the ground are not earning money. The cost of error in MRO is measured in three currencies. Turnaround time, where every extra day in the hangar or the dock erodes the operator's commercial case for sending the asset to your facility rather than the competitor's. Quality of repair, where a return-to-service that fails on first flight, first run, or first sailing destroys customer confidence and triggers warranty exposure. Workforce productivity, where MRO is a skilled-trade operation running across mechanics, technicians, engineers, NDT inspectors, paint and finishing crews, and component-shop trades, all stacked into a constrained bay or hangar footprint.
The lever that holds the operation together is the day-by-day, asset-by-asset planning and supervision rhythm. Proudfoot installs that rhythm as the Perfect Bay Day, with consultants on the ramp and in the bay, where the turnaround is won. A large MRO operation runs on dispersed teams, multiple shifts, a deep parts catalog, a long-tail of contractor and OEM support, and a span of control that pulls a planner across half a dozen assets in different states of disassembly. The discipline that keeps the bay flowing is the supervisor on the engine-shop floor, the planner at the day-board reading the bottleneck against the schedule, and the materials coordinator making sure the right part is at the bay when the technician needs it. The Proudfoot work in MRO lands at that point.
Where the discipline lands.
Commercial aviation MRO
Line maintenance, base maintenance, engine shop visits, component overhaul, and APU repair across narrowbody, widebody, and regional fleets.
Military aircraft sustainment
Depot-level maintenance, mission-readiness recovery, fleet readiness improvement, and capability-upgrade integration on rotary and fixed-wing platforms.
Naval and marine MRO
Dry-dock refit, mid-life upgrade programmes, planned and emergent surface-vessel maintenance, and submarine sustainment adjacency.
Rail rolling-stock overhaul
Locomotive heavy maintenance, multiple-unit refurbishment, bogie overhaul, wheelset turning, and traction-package rebuild.
Industrial rotating equipment
Gas-turbine module rebuild, compressor overhaul, pump and valve refurbishment, and rotating-equipment health-monitoring programmes.
Mining fleet rebuild and overhaul
Haul-truck major-component exchange, dragline overhaul, shovel and excavator rebuild, and underground equipment refit cycles.
Manufacturing capital-asset overhaul
Machine-tool rebuild, robotic-cell refurbishment, press and stamping-line major maintenance, and electronics test-equipment refit.
Six capabilities MRO COOs recognize.
Improve Asset Utilization
Depot throughput, bay turn-time, return-to-service cycle reduction, and asset availability against the operator's commercial schedule. The MRO operation's commercial product is the asset back in service; every component of the operating discipline is sized against the bay clock and the bottleneck on the critical path.
Improve Productivity
Wrench-turning time, technician productivity, supervisor-to-trade ratio, shift discipline on the hangar frontline. Productivity in MRO is a planning question first and a coaching question second; the planner who sequences the day-by-day kit to the bay sets the ceiling, and the supervisor who runs the day-board against the kit holds the gap to that ceiling.
Optimize Workforce
Trade-mix design against the asset program, shift-pattern alignment to depot demand, span of control that lets the supervisor coach rather than chase, and workforce planning across the deep skills-shortage exposure most MRO operators now run with. Apprentice progression and trade-mastery curves drive the long-run economics.
Reduce Raw Materials Cost
Consumables across the maintenance estate, repair-versus-replace standards at the component shop, scrap reduction on the parts repair line, and OEM-versus-PMA parts strategy where regulation allows. The MRO consumables and parts bill is a quiet operational lever that repays disciplined practice.
Optimize Inventory
Rotable pool sizing, consumables stock policy, parts-shortage prediction, repair-pool turnover, and the working-capital release that comes from sizing the rotable inventory against the actual demand curve rather than against the OEM's spare-parts catalog.
Improve S&OP
Forecasting depot demand against operator schedules, capacity planning across multiple bays and component shops, scheduling the heavy-maintenance event ladder, and reconciling the planned event book to the unplanned and emergent work that always lands in the middle of the schedule.
Asset Management. Production. Construction.
Asset Management
The reliability discipline behind the work. Planned maintenance execution to standard, planned shutdown and turnaround orchestration, condition-based monitoring, spare-parts strategy, and the right work on the right asset at the right interval.
Production
The flow of work through the bay, the engine shop, the component overhaul line, and the dry-dock. Throughput, yield, return-to-service rhythm, OEE on the depot, and the frontline supervision that holds the schedule together.
Construction
Depot capacity expansion, new bay installations, hangar build, dry-dock construction, and the capital projects that grow the MRO footprint. The same operating discipline that runs the depot, run on the project site.
The method behind the work.
The Proudfoot System runs the engagement end to end across 5 phases and 86 steps, sized to the turnaround clock and the hangar slot. Three components carry the MRO work: short interval control on the check, the rotable inventory sized to the demand curve, and the supervisor behaviors that hold quality of repair on return to service.
The Proudfoot MOS (the 6+4 Element Framework) is the operating discipline that makes the capabilities deliverable. The 6+4 cycle drops cleanly onto the MRO depot: forecast and plan the bay demand, schedule against capacity, communicate the daily kit to the trades, execute the day on the floor against the day-board, follow up on variance at shift change, review the week against the schedule. The four elements that frame the cycle (purpose, organization, capability, behaviors) make the difference between an MRO operation that turns assets to plan and one that runs late on every other shop visit.
The 8 Active Management Behaviours (8AMBs) are the supervisory behaviors that make the operating discipline stick. Observable on the engine-shop floor, the bay supervisor's day-board walk, the planner-coordinator handover, the materials-to-bay coordination point, and the daily standup. Codified, coachable, repeatable. In MRO the behavior set is particularly relevant because the trade workforce is deep, skilled, and slow to replace; supervisory behavior change is the lever that lifts the operation without expanding headcount. Aerial Mapping is the structured executive interview discipline that surfaces the value at the start of the engagement, across the depot GM, the head of operations, the head of planning, the heads of base and line maintenance, the head of engine shop, the head of component shops, the head of quality and airworthiness, the head of supply chain, and the head of customer operations.
What it looks like when it lands.
Talk to our MRO partners.
Commercial aviation MRO and defense sustainment lead, UK. Depot throughput, return-to-service cycle, supervisory discipline on the hangar frontline. Multi-decade footprint across EMEAA MRO majors.
Industrial rotating equipment, rail rolling-stock overhaul, manufacturing capital-asset rebuild, Germany. Engineering-grade operational discipline across the German-speaking industrial corridor.
Five days on the frontline. One decision at the end.
Two senior Proudfoot operators on a priority site for five working days, with Proudfoot AI reading the operating data and the corpus first, remotely. Walkthrough, executive interviews, day-in-the-life-of observation on the bay supervisor and the planner, MOS Critic on the management system, and a quantified opportunity hypothesis prioritized by lever. Decision-grade material in a week, sized to the operation.
Frequently asked questions about Proudfoot in MRO
Proudfoot installs the management operating system that makes depot supervision and planning measurable, coachable, and repeatable. In MRO the work focuses on depot throughput, bay turn-time, return-to-service cycle reduction, wrench-turning time, technician productivity, and the planning rhythm that holds the schedule together. The same operating discipline runs across aviation, defense sustainment, rail, marine, industrial rotating equipment, and capital-asset rebuild.
Commercial aviation MRO, military aircraft sustainment, naval and marine MRO, rail rolling-stock overhaul, industrial rotating equipment, mining fleet rebuild and overhaul, and manufacturing capital-asset overhaul. The discipline is one; the detail of what gets installed adapts to the asset class and the regulatory frame.
Results include a 22% reduction in shop visit turnaround time on a widebody-engine overhaul operation, a 35% improvement in fleet readiness on a rotary-wing depot-level maintenance operation, an 18% increase in shop throughput with 14% fewer average days-in-shop and $8m released from the rotable pool at a heavy-maintenance locomotive shop, and $53m released from the schedule by recovering the critical path on a surface-vessel mid-life upgrade program.
Proudfoot has installed at depth in MRO operations for 80 years, across commercial aviation, defense sustainment, rail rolling-stock, marine refit, industrial rotating equipment, and capital-asset rebuild programs worldwide. MRO is a high-mix, variable-routing operation running against fixed asset return-to-service deadlines, and every depot, hangar, and overhaul bay is a queue against an asset clock.
Two senior Proudfoot operators spend five working days on your priority site, with Proudfoot AI reading the operating data and the corpus first, remotely. The output includes a walkthrough, executive interviews, day-in-the-life-of observation on the bay supervisor and the planner, a MOS Critic read on the management system, and a quantified opportunity hypothesis prioritized by lever. Decision-grade material in a week, sized to the operation.