Suggestion System

A suggestion system is one of the highest-leverage and most consistently botched practices in manufacturing. The math is uncomplicated: a 30-person shop has 30 people who see problems every day. If even half of them raise one idea a month and the shop adopts a third of them, that is 60 improvements a year for free. Most shops capture maybe five. The bottleneck is never the supply of ideas; it is the closure loop on the receiving end. Build the loop and the supply takes care of itself.

"The first ten ideas you fail to respond to are the last ten you will receive."

How a suggestion system works

A working suggestion system has three operating rules and one underlying discipline.

The first rule is frictionless intake. Any worker can post an idea at any time, in any rough form. The intake mechanism is whatever fits the shop: a card on the idea board, a note in a shared inbox, a written suggestion handed to a shift lead. Long forms and approval steps kill flow. The intake should take a worker less than two minutes.

The second rule is fast acknowledgment. Every idea gets a confirmation within 48 hours that it has been received and who is reviewing it. Acknowledgment is not approval; it is the signal that the idea has not vanished. Without it, workers assume the idea is lost and stop submitting.

The third rule is written decision. Every idea gets a written response within two weeks, whether adopted, declined, or held for further investigation. Adopted ideas move to a small experiment or directly into the standard work. Declined ideas get a brief written reason: tried before, conflicts with another change in progress, cost outweighs benefit. The written reason is what keeps decline from feeling like a black hole.

The underlying discipline is ownership. Someone's standard work includes triaging new ideas, assigning owners, and following up on closure. Without an owner, the system collapses in the first busy month. The owner is often a shift lead or a continuous improvement coordinator, and the role takes about 30 minutes a day in a working system.

Together these three rules and one discipline turn employee observation into shop improvement at a steady, compounding rate.

Where a suggestion system fits on the shop floor

Imagine a 28-person CNC shop where the owner has been frustrated that workers "do not bring up problems." The shop has had a wooden suggestion box near the break room for three years. The owner empties it twice a year. Roughly four ideas a year get adopted. The flow has been declining.

The owner replaces the box with a working suggestion system. He puts up a four-column idea board near the production area and announces three rules at Monday's huddle: any worker can post a card, the shift lead will acknowledge within 48 hours, the shop will respond in writing within two weeks. He assigns the morning shift lead to own the triage as part of his leader standard work. The first card goes up on Tuesday.

By the end of the first month, 14 cards have been posted. The shift lead has triaged each within 48 hours. Seven have been decided: three adopted with standard work updates, two declined with written reasons, two are being tested. By month three, the board carries 30 to 40 cards a month. The shop is adopting 8 to 12 ideas a month. The owner has not added software or headcount. He has built the closure loop.

Common mistakes with a suggestion system

• Collecting without responding. A box that fills and never empties teaches workers asking is pointless.
• Rewarding raw submission count. Pay for adopted ideas or impact, not for participation theater.
• Making the intake formal. Long forms and committees kill the flow at the gate.
• No assigned owner. Without standard work on triage, the system collapses the first busy month.
• Treating it as HR. The system lives on the floor with the work, not in HR.

Suggestion system and related Lean tools

The most common visible implementation of a suggestion system is the idea board, the four-column visual board that makes the closure loop public. The system is the structural fix for non-utilized talent, the eighth waste, and it is the operational expression of respect for people. When a posted idea touches a complicated underlying problem, the investigation often shifts to a quality circle format with a small focused team.