Pick-to-Light — Making the Wrong Pick Physically Impossible

There is a wrong way to think about kitting errors and a right way. The wrong way says: "Operators need more training." The right way, articulated repeatedly in the lean / pokayoke canon since the 1980s, says: "If the wrong outcome is physically possible, it will eventually happen — fix the physics."

Pick-to-Light is the canonical answer in kitting and assembly: make the wrong pick physically impossible by lighting only the right bin and locking the others.

What Pick-to-Light is and isn't

Pick-to-Light is:

• An LED indicator on every bin that lights up when that bin is the next correct pick.
• A confirmation switch (button, sensor, or scan) the operator hits to advance.
• A lock or guard on adjacent bins so they're physically inaccessible during the wrong moment.
• A real-time logger of every pick — operator, time, bin, kit number.

Pick-to-Light isn't:

• A training aid. It's a poka-yoke. The whole point is that training quality stops mattering.
• A standalone gadget. The value lives in the integration with the work-order system, not the lights themselves.

How MileSoft Pick-to-Light handles it

The MileSoft Pick-to-Light system gives you:

1. LED + confirmation hardware sized for actual industrial environments (oil mist, vibration, dust).
2. Bin lock integration — magnetic locks or physical guards that release only on the correct pick.
3. Live work-order integration with ERP / MES so the system always knows which kit is next.
4. Per-pick telemetry — operator, kit, bin, timestamp — feeding into Andon for cell-level OEE.

Quietly important features

• Multi-language voice prompts for plants with mixed-language workforces.
• Operator authentication via badge or biometric so events are reliably attributable.
• Vision-cross-checks for high-stakes kits (medical, ADAS) where the lock isn't enough.

Where it fits

The strongest pokayoke deployments combine Pick-to-Light with:

• Radar Assembly for the alignment + validation step downstream.
• AC Performance Test for end-of-line functional testing.
• Material Traceability so the kit's lot history travels with it.

The takeaway

If your kitting line still relies on training to prevent wrong picks, you have a defect rate floor you can't push past. Pick-to-Light pushes the floor to zero — not by being a better gadget, but by removing the failure mode entirely.

Book a demo and we'll set up a tabletop Pick-to-Light cell so your team can experience the difference.