← BackManufacturing Fundamentals
Purpose: turn workshop work into repeatable output with clear quality gates and low waste.
Quick Start
- Define one product and one quality standard for this week.
- Map process from material intake to finished inspection.
- Create one-page SOP at each station.
- Track scrap, rework, and cycle time daily.
Core Production Stack
- Input control: verify dimensions and defects before use
- Station setup: tools, jigs, and gauges at fixed locations
- Process control: hold points after each critical operation
- Output control: final checklist with measured tolerances
Decision Table
| If this happens | Do this now | Backup action | Verify |
|---|
| Rework spikes above 10% | Stop and inspect upstream station | Reduce batch size | Rework falls in next run |
| Material variation found | Segregate suspect lot | Use alternate stock | Traceability log updated |
| Tool calibration drift | Recalibrate before resume | Use verified backup gauge | Test piece passes tolerance |
| Throughput drops suddenly | Identify bottleneck station | Rebalance labor and sequence | Cycle time returns near target |
Common Mistakes and Fixes
- Mistake: undocumented process changes. Fix: controlled change log.
- Mistake: quality only at end. Fix: in-process hold checks.
- Mistake: cluttered station layout. Fix: fixed tool shadows and labels.
- Mistake: no scrap coding. Fix: classify root causes daily.
Scenario Drills
Drill 1: Incoming Material Defect
- Inject off-spec stock into intake bin.
- Run receiving checklist.
- Confirm lot quarantine and substitution.
- Goal: defect never reaches station 2.
Drill 2: Gauge Failure Mid-Run
- Simulate measurement tool fault.
- Pause line and switch to backup gauge.
- Recheck last 5 parts.
- Goal: zero escaped defects.
Printable Checklist
- [ ] Intake lot verified
- [ ] Station SOP visible
- [ ] Critical hold checks passed
- [ ] Scrap/rework logged
- [ ] Calibration status current
- [ ] End-of-run inspection complete
- [ ] Shift handoff recorded
Discipline rule: if a process cannot be measured and taught, it is not production-ready.
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