Process Controls & Error-Proofing
We build the checks, holds and scan gates that stop a known mistake at the station where it happens, from mandatory quality sign-offs to production holds on out-of-spec results.
How do you reduce human error in manufacturing?
Design the process so the mistake can't happen (a poka-yoke), or so it's caught the moment it does, before the part moves on. Training and reminders help for a while, then wear off as people change roles. Fix the costliest, most frequent errors first, make each control as close to prevention as you can, and check the data afterwards to confirm the error has stopped.
Tribal knowledge doesn't survive turnover
Every plant has procedures that exist mostly in people's heads: the double-check the experienced operator always does, the torque sequence that matters, the label that must never be printed early. Training passes some of it on. The rest leaves when the experienced operator retires or moves to days, and the error rate goes up.
With a digital poka-yoke, nobody has to remember. Production can't continue until the check is signed off, and an out-of-spec result holds the part where it is. The double-check that lived in one person's head becomes a step every shift follows.
Move every control as far up this list as it will go
Not every error can be made impossible. Anything caught at level 4 has already had more work put into it, so each level you move a control up saves rework.
| Level | What it does | Physical example | Digital example |
|---|---|---|---|
| 1Eliminate | Removes the step that can go wrong | A part designed so it can only be assembled one way | Counts and stop times read from the machine instead of typed in by an operator |
| 2Prevent | Makes the mistake impossible | A fixture that only accepts the correct orientation | The shipping label won't print until every component is scanned and inspection has passed |
| 3Detect now | Catches it the moment it happens, before the part moves on | A go/no-go gauge at the station | An out-of-spec reading flagged as it's entered, with the right people notified and the result held |
| 4Inspect later | Finds it downstream, after more work has gone into it | End-of-line inspection | An audit or sample review at the end of the shift |
Four kinds of control we build
Mandatory Checks & Holds
- Quality checks must be acknowledged and completed before production continues
- System holds on out-of-spec measurement results or failed checks
- Production hold and release controls with a full record of who released what, and why
Scan-Based Verification
- Scan-to-confirm workflows for part verification and traceability
- Scan-to-pack, with the shipping label held until every component is in the box and the unit has passed inspection
Permissions & Process Discipline
- Operator permission controls that enforce who can do what
- Steps locked into a set order
- Custom logic built around your specific process requirements and known failure modes
Digital Kanban
- Material flow management with replenishment signalling
- Replenishment triggered by consumption instead of a scheduled walk-round
- Visible queue status for material handlers and supervisors
Scan-to-pack at AprilAire
Every AprilAire unit's components are scanned into the box, the right number of bolts is confirmed torqued to the right force, and the shipping label prints only when the serialized unit is complete and final inspection has passed.
Read the AprilAire case study →Labels printed at the line at AMPI
“Before 10in6 a roll of labels was printed in the foreman’s office at the start of the run. Now labels are printed right at the line in real-time, including a date/time stamp. This has eliminated the risk of using incorrect labels, reduces downtime at the start of a run and also helps us quickly narrow the scope of any quality issues reported back to us.”
— Joey Vogel, Production Manager, AMPI
Read the AMPI case study →“The Scan to Pack functionality has also greatly reduced training time for the final pack operation. Almost anyone can jump into the role because they no longer have to memorize the bill of materials for each model, it’s right there in front of them.”
Choosing your first error-proofing targets
- List the errors that keep happening. Customer complaints, nonconformance reports, scrap reasons, audit findings, the check that gets skipped on nights.
- Rank them by cost and frequency. A wrong label that ships once a quarter can cost more than a daily minor defect caught in-house.
- Ask whether a check would catch it in time. If people make the error even with a check in place, you need prevention, not another check.
- Build one control, on one line. Take a baseline first, then compare. One proven workflow makes the case for the next.
- Standardize it. Update the control plan and the work instructions so the next shift, and the next new hire, inherit the fix.
Recurring errors usually show up as recurring defects. Our guide to why the same defects keep coming back covers the checks, SPC, inspection and traceability that sit alongside error-proofing.
First time through at Stackpole's water pump operation in six months, after paper checks were replaced by guided digital checks with on-screen work instructions.
Read the case study →The modules behind these controls
Set up around how your plant runs
Standardized platforms expect the plant to change to fit the software. Do-it-yourself platforms leave your team to build and maintain everything. With 10in6, we configure the system around your equipment, codes and reports, and your team runs it day to day.
Your equipment, codes and reports
Your checks, intervals and forms set up per line and product, and traceability built around your part numbers and your customers’ requirements.
Your team runs it day to day
Operators, downtime and scrap codes, products and targets, shift schedules, checks, alerts, emailed reports and real-time boards are managed by your own people. Everyday changes need no support ticket and no invoice.
A project manager for the bigger things
New machines, new modules and custom reports go through a 10in6 project manager who already knows your deployment, so nothing starts from scratch. If you would rather we made everyday changes too, we can.
Still here years later
The system keeps being refined after go-live, and new capabilities are added without rebuilding it. Some of our customer relationships have run for 12 years, and 97% of customers say they would never go back.
“Our 10in6 Project Manager has been very responsive and the software is flexible enough to be configured to our specific needs.”
How the 10in6 delivery model works →
Error-proofing questions
- How do you reduce human error in manufacturing?
- Stop relying on people remembering. Retraining and reminders fade with turnover, night shifts and busy days. Instead, design the process so the error can't happen (prevention), or is flagged the moment it does, before the part moves on (detection). Start with the errors that cost the most and recur most often, move each control as far toward prevention as it will go, and confirm in the data that the error has stopped.
- What is the difference between error prevention and error detection?
- Prevention makes the mistake impossible: a fixture that only accepts the part one way, or a shipping label that won't print until every component has been scanned. Detection lets the mistake happen but catches it immediately: an out-of-spec reading flagged the moment it is entered, or a hold on a failed check. Prevention is stronger; detection is often quicker to put in place. Both beat inspection at the end of the line.
- What are examples of digital poka-yoke?
- Scan-to-pack, where every component is scanned into the box and the label prints only when the unit is complete and has passed inspection; labels printed at the line in real time with a date and time stamp instead of pre-printed in an office; quality checks that must be completed before production continues; holds on out-of-spec results; required step sequences that can't be skipped or reordered; and permission controls on who can release or override.
- Can our own team set up checks and alerts, or does 10in6 have to?
- Your team can. After go-live, plant staff manage scheduled checks and how often they run, alerts and who receives them, and reason codes, without contacting 10in6. Custom error-proofing logic built around a specific process, such as a scan-to-pack sequence or label gating, is built by 10in6 as part of the service, because it is tailored to your products and failure modes.
- What is a poka-yoke?
- Poka-yoke is the lean manufacturing term for error-proofing: designing a process so mistakes are prevented, or caught immediately, instead of discovered later. A fixture that only accepts a part one way is a physical poka-yoke; a system that won't print a shipping label until every component has been scanned and inspected is a digital one. 10in6 builds the digital kind.
- Can 10in6 actually stop production, or just warn about problems?
- Most controls are enforced at the workflow and release level: a quality check can't be skipped, a hold prevents out-of-spec product from moving forward, a label won't print until the unit's requirements are met. Where a deeper machine-level interlock makes sense, that's assessed case by case with your controls team during scoping, since it touches your control systems directly.
- Won't this slow our operators down?
- Done right, it's faster than what it replaces. On-screen work instructions remove the guesswork from checks, a barcode scan is quicker than a manual verification, and operators stop losing time to rework, sorting and re-packing. At AprilAire, scan-to-pack error-proofing also significantly reduced training time for new operators on final pack.
- Where should a plant start with error-proofing?
- Start from your known failure modes: the customer complaint that keeps recurring, the packaging error that happens every few weeks, the check that gets skipped on night shift. One focused error-proofing workflow on one line proves the pattern, and then you extend it. That's how most 10in6 customers approach it.
What's your most expensive recurring mistake?
The wrong label, the missed check, the part that ships incomplete. Tell us about it, and we'll show you what a poka-yoke for that exact failure looks like in your plant.
Free 30–60 minute call with one of our engineers.