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Production line supply with Pick to Light: error-free supermarket and milk-run picking

In production line supply, Pick to Light lights up the supermarket locations of the parts a logistics operator must pick for a specific line, station or milk-run tour, and shows the quantity. No more searching lists: picking speeds up and missing or wrong parts no longer stop production. At Witte Automotive, processes became 60% faster and capacity rose by 20%.

At a glance

  • 5,000 positions deployed in 6 weeks at Witte
  • Training under 30 minutes at Johnson Controls
  • Our own P2L hardware and software since 2018

When logistics cannot keep up with production takt

A production supermarket holds hundreds or thousands of parts, and logistics staff fill carts for each line at fixed intervals. Every error means downtime or an emergency run, and with shift changes and new people, accuracy depends largely on individual experience. Expanding the supermarket floor space is often not an option.

Production line supply with Pick to Light: error-free supermarket and milk-run picking

How Pick to Light speeds up line supply

Light-guided shelf supermarket

A light above or below the location shows where to take the part and how many. The next task arrives as soon as the pick is confirmed.

Several routes on one rack

Colour coding lets several operators pick for different lines or milk-run tours at the same wall without getting in each other's way.

Large parts on the floor

Bulky containers can sit in Flat Storage with rail tracks and LED navigation gates, fitting up to 30% more on the same floor area.

Fast onboarding across shifts

New operators do not need to know where parts are stored. At Johnson Controls, training a newcomer takes literally a few dozen minutes.

How it works

  1. 1Production or the ERP issues a replenishment request for a line or a milk-run tour.
  2. 2The system splits it into supermarket locations and assigns it to an operator or colour.
  3. 3The locations of the required parts light up with quantities.
  4. 4The operator picks the parts onto a cart or into a tote and confirms each pick.
  5. 5When complete, the system reports the delivery as ready and updates the ERP.

WMS and ERP integration

Supply requests come from your ERP, WMS or production systems via REST API, MQTT or WebSocket, as at Škoda Auto, where the solution was integrated with production management systems. Pick confirmations return in real time. At Witte Automotive, the project included integration with production and real-time monitoring of the whole material flow.

Software

What to prepare for an inquiry

  • Number of parts in the supermarket and rack or tote types
  • Number of lines supplied and tour frequency
  • Whether you supply per line, station or kit
  • The system that issues replenishment requests
  • Share of bulky parts stored on the floor

Frequently asked questions

A pilot at one workstation is usually done in 2–4 weeks. Larger projects take longer depending on scope: at Witte Automotive we deployed 5,000 positions in 6 weeks as part of a material flow redesign. Installation goes onto existing racks without construction work, so production keeps running and the changeover is planned section by section.

For most projects we see payback in under 2 years. At Witte Automotive specifically, the project brought a 20% capacity increase, 60% faster processes and ROI under 2 years. In production, savings come from faster picking, fewer stoppages caused by missing parts, and higher capacity without extra floor space.

Yes. The CI4 control software can run locally without an internet connection, and data synchronises once connectivity returns. For critical operations we offer redundant setups. The LED strips themselves are designed so that one failed light does not stop the whole rack, so picking for the line continues even if a single component fails.

Yes. For milk-run supply the supermarket is picked tour by tour, and each tour can have its own colour in the system. An operator can prepare several tours in parallel, and the light only ever shows the parts for theirs. If the tugger or cart carries totes for several stations, it can be fitted with LED positions so parts go straight into the right tote.

Shall we look at your operation?

Send us your number of locations, orders and shifts – we will propose a setup and a payback estimate.