🎯 How to Identify & Eliminate Bottlenecks in Caravan Manufacturing
Lean thinking + digital visibility = faster flow, higher throughput
In caravan manufacturing, delivery time is rarely “the sum of every step”. It’s usually the sum of your wait times — vans waiting on parts, teams waiting on approvals, installers waiting on drawings, and QC waiting to get issues rectified.
What a Bottleneck Looks Like (Real World)
📦 Work Piling Up at One Stage
Fitout, electrical, plumbing, cabinetry congestion while other stages sit idle
🔍 Trades Constantly “Chasing Parts”
Lights, hatches, fittings, appliances, water pumps, chargers, windows, seals always missing
⚠️ Issues Discovered Late at QC/PDI
Causing rework to ripple backwards through production
🔄 Daily Re-prioritisation
Vans getting re-sequenced because the schedule doesn’t match reality
🚨 Purchasing Expediting Everything
Lead times weren’t visible early enough, now it’s firefighting mode
📝 Surprise Rework Mid-Build
Option changes or unclear specs creating unexpected delays
How to Find the Constraint (Stop Guessing)
Your constraint is the stage that sets the pace for everything else. It’s usually where work piles up, skills are scarce, or issues are discovered too late.
📊 Consistently Overloaded
Queue keeps building at this stage while others wait
👷 Hard to Staff
Scarce skills, difficult to find qualified tradespeople
🧩 Dependent on Scarce Components
Waiting on supplier deliveries, long lead times
🎲 Highly Variable
Custom work, changeovers, rework makes timing unpredictable
🔍 Issues Discovered Last
Problems found here make rework explode backwards
Common Caravan Manufacturing Bottlenecks
Lean Strategies That Actually Stick
A) Reduce Variation Before Adding Speed
- Standardise work steps and stage-gate checklists
- Simplify option pathways where possible
- Reduce “special” jobs that break flow
- Don’t release work without materials ready
B) Create a Pull System (Not Push)
- Set WIP limits per stage
- Release new work only when next stage can accept it
- Prioritise based on due date + constraint capacity
- Stop the “who shouts loudest” approach
C) Fix Upstream Blockers
- Parts kitted properly (no substitutions without sign-off)
- Drawings/spec changes controlled
- Approvals out of email/text threads
- Defects caught earlier, not at QC/PDI
Add Digital Visibility Where It Matters Most
1️⃣ Scheduler & Overview
The problem: Bottlenecks surprise you when they’re already causing delays
What visibility gives you:
→ See WIP across stages at a glance
→ Spot queues building early
→ Resequence jobs before losing days
→ Track van age at each stage
2️⃣ Stock + BOM / Inventory
The problem: Missing parts create artificial bottlenecks
What visibility gives you:
→ Link each job to its BOM/options
→ See shortages before van hits floor
→ Kit earlier, reduce “hunt time”
→ Don’t start work that will stall halfway
3️⃣ Purchasing
The problem: Purchasing runs blind, production stays reactive
What visibility gives you:
→ Track supplier lead times (actual vs expected)
→ Trigger reorders at the right point
→ Stop expediting everything
→ Align purchasing to build plan
4️⃣ Communication & Collaboration
The problem: Many bottlenecks are decision delays
What visibility gives you:
→ Automated alerts when stages are blocked
→ Internal notes attached to van/job
→ Fewer walk-arounds
→ Faster decisions, less waiting
Real-World Example
🏭 Mid-Sized Australian Caravan Builder Cuts Lead Time by ~15%
The Problem:
- Vans started without parts fully ready
- Floor re-prioritising daily to “stay busy”
- Constant stoppages and expediting
What They Did (Simple, Not Magical):
- Implemented a live scheduler so everyone worked from the same plan
- Connected BOM/stock checks to scheduled vans
- Introduced a “materials ready” rule before releasing work
- Used alerts to flag shortages and stage blocks early
Result: Within weeks they reduced stoppages caused by missing parts, smoothed WIP flow, and cut average lead time by ~15% — without adding overtime.
Impact of Bottleneck Elimination
KPIs to Track (Find Bottlenecks Fast)
If you only track three numbers weekly, make it these:
Throughput (Vans Completed Per Week)
Your truth metric. If throughput isn’t improving, your bottleneck hasn’t moved.
Rework Rate (% Needing Fixes at QC/PDI)
Rework steals capacity from your constraint and creates queues everywhere.
Days Blocked Per Van (+ Top Block Reasons)
Reveals whether your bottleneck is “work speed” or “waiting time”.
Practical Next Steps (Start Tomorrow)
List your real stages and capture WIP age (how long vans sit at each stage)
Find the constraint (where queues consistently build)
Set WIP limits and stop releasing vans without parts ready
Sync scheduling with stock + purchasing lead times
Add alerts so problems show up early — not at delivery time
Remember: The goal isn’t to speed up everything. It’s to speed up the constraint first, because it controls throughput.
