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From a Fortune 500 giant to a 35-employee CNC shop, the size difference is hard to overstate. Last month, seven continuous improvement professionals from Archer Daniels Midland toured Micron’s shop floor to find the parallels between the lean discipline ADM manages across a global footprint and Micron’s.

ADM is a global food processing and commodities trading company with over 270 plants. The bridge between this company and Micron is Dan Vermeesch, former Plant Manager at Micron. Dan was a champion of Micron’s lean transformation — a push that modernized our production machining systems and eventually earned us the Shingo Silver Medallion for operational excellence. He’s since moved into a continuous improvement role at ADM, which ranks No. 58 on the Fortune 500 and landed on Fortune’s World’s Most Admired Companies list. When he wanted to show colleagues from several ADM divisions what disciplined shop-floor systems look like in practice, he brought them back to Micron.

We were happy to walk this group through our lean systems — and happier still to know, after a lean journey that began almost 30 years ago, that they hold up well enough to be instructive to a company operating at ADM’s scale.

In Part 1 of this series, we made the case that every visual system trends toward wallpaper, and covered methods to design against the mechanisms of habituation. In Part 2, we laid out a framework for regular review to catch visual systems that are going stale.

In this post we highlight four visual systems from our own shop floor, which illustrate how ownership, interactivity, and design for the user keep visual systems fresh.

Examples from Micron’s Shop Floor

Production Schedule Boards

The production schedule board may be the highest-stakes visual system in a CNC job shop. When it’s right, it eliminates unforced errors in scheduling, unlocks flexibility to respond to customer rush orders, and drives efficient arrangement of setups and runs.

The CNC team lead is responsible for scheduling, but each machinist has a role to play in updating the board throughout the day. Quality uses the board as well, creating documentation in advance of the production run.

Each job card carries the information most pertinent to CNC scheduling: job number, part number, customer, run and setup hours, the deadline to reach the next operation, and the to-customer deadline. Shift information for each run ensures the hours on the board match the reality of who’s actually on the floor.

Exceptions stand out. Late orders, holds, and stop notices are flagged visually so they don’t require anyone to read through fine print to find them. Rather than sit at the bottom, the reference sheets that support this schedule live in a gap across the board’s median — at eye level.

Total Productive Maintenance (TPM)

The value of TPM lies entirely in consistency, and consistency requires more than good intentions. It requires a system that prompts the work, specifies the work, and verifies the work.

We split these functions across two layers, using the main production board as the initial prompting tool, which includes TPM tracking per shift. This means production workers are prompted to complete their PMs as they check the schedule at shift start. The team lead can also confirm at a glance whether maintenance was completed for each machine.

The work specification lives at the machine. Each TPM log is a dry-erase checklist specific to that piece of equipment, laid out by frequency — daily, weekly, monthly, quarterly, yearly — with tasks isolated in step-by-step order. An overhead diagram of the machine shows where each task is performed, and arrow tags on the machine itself provide a secondary visual callout. The log tells the operator what, when, and where with as little interpretation as possible.

A maintenance department audit closes the loop. Because the log is dry-erase, the maintenance department can check completion and wipe for the next cycle without the log accumulating layers of old data. Each machinist owns their checklist, while maintenance owns erasing it once the audit is performed.

Logistics and Material Tracking Boards

While our logistics board runs on a card system similar to what we have in production, this one is customized to the demands of the shipping department.

The core challenge of logistics tracking is managing orders that are physically outside the building. With orders at outside processing vendors, potentially on a multi-leg journey, the obvious physical cues (you can see the part, you can check the machine) don’t exist. When did the parts go out? When are they due back? What other orders do we have at the same vendor? Without a strong visual system, outside ops tracking runs on memory.

This board is owned by the shipping specialist and ties the paper trail — bills of lading, order confirmations, POs — to a card system calibrated to the needs of logistics. Each card answers the questions that matter for outside operations at a glance: which orders have gone out, who’s processing them, when did they leave, when are they due back. Thumbtack markers flag late orders and ASAP status so exceptions surface immediately without scanning the full board.

The design also accounts for what happens when parts come home. Cards transfer from the outside ops board to a receiving inspection board where Quality can easily check for new arrivals, and from there to the sort schedule board if applicable. That continuity matters — it means the visual trail doesn’t break when the order crosses back through the dock door.

Sort Schedule Board

Our sort schedule board has to account for two constraints: a variable pool of operators and a fixed number of workstations. The board also has to forecast operator time needed per week to meet shipment deadlines. When that need exceeds the time dedicated sort personnel can cover, the shop knows to assign additional production workers.

An operator viewing this board must be able to quickly interpret which sort is most urgent and assign themself to the highest priority task for which they are trained. The owner, the shipping specialist — who also owns the outside ops board above — must be able to manage workstation constraints and earmark tasks for specific operators based on their job training.

Color-coded cards denote whether the job is part of a spot buy production schedule, stocked inventory program, unscheduled non-conformance sort, or a miscellaneous pre-shipment task. Pins with initials of trainees allow for earmarked assignments.

A Living Work

The examples presented above are far from the entire catalog of our visual systems. However, we picked these as examples that showcase what we strive for at Micron — boards designed for long-term visibility and usefulness, a culture of self-evaluation and reimagining, and individual systems that work together as a greater whole.

In the spirit of this series, we’ll say plainly in closing: none of these systems are finished. The discipline of continuous improvement means that we endeavor to constantly evaluate and improve what we have. Wallpaper isn’t a problem we’ve solved so much as one we keep choosing to fight. We hope some of the takeaways offered here prove useful in your efforts as well.

This is the second post in a three-part series on lean visual systems. Read Part 1 here for the design principles that keep a visual system from losing its edge in the first place.

Refreshing a visual system isn’t a one-time fix. It’s part of the ongoing discipline of lean. People get used to what’s in front of them. Over time, even a well-designed board or work instruction can stop registering, no matter how useful it once was. The only real defense is to periodically look at a system the way an outside consultant would on their first walk of the floor: with no assumptions, no institutional memory, and no complacency.

Reviewing Visual Systems with Fresh Eyes

In Part 1, we discussed how habits serve as shortcuts to save us effort on attention, turning the familiar into the unseen. To undo that, a team has to look at their own boards and processes as if they were unfamiliar.

This is a difficult task. You can’t undo knowledge. You can’t see something again for the first time. You’re also generally unaware of how used to an environment you’ve really become. Until, that is, you find a piece of low-hanging fruit you’ve unwittingly tolerated for far too long.

With the difficulty of this task in mind, we offer this four-point framework we return to when it’s time to refresh our own visual systems.

1. Walk the floor like a newcomer.

Could someone unfamiliar with the operation follow along using the visual systems alone? Where are the gaps — the places filled in by institutional knowledge instead of the board itself?

When visitors are on-site, it’s worth asking them to interpret a board or two. What do they catch? What do they miss?

Frequently, actual newcomers — new hires — can provide some of the sharpest insights when encouraged to do so. They are truly interpreting these systems for the first time. Often, they came from a different production environment and are actively seeing the shop’s visual systems in contrast to the last one.

2. Ask the people who use the systems every day.

Operators and leads are usually best positioned to say whether a board still does its job. This works best when they’ve also been shown how to flag a problem or request a change.

Walk through the steps for changing a visual system with operators. When an operator notices a board’s out of date, do they know what action to take? Do they understand the organization’s process for evaluating a change request after it’s been flagged?

Most important of all: When operators suggest making a change to a board, do they receive follow-up when decisions are made? Even if the ultimate decision is not to change anything, hearing the reasoning behind that decision is feedback that input is valued and considered.

3. Keep the information current.

Pick a sample of boards, work instructions, and travelers on a given day, and check them against what’s actually happening on the floor. Each gap between the display and the real state of work, usually minor at first, becomes a piece of tribal knowledge. The first step in the solution is to make visual systems congruent with the actual process. The next is to ingrain a habit of updating them simultaneously.

4. Trace failures back to their visual systems.

When a job misses, a setup gets wasted, or a quality issue slips through, it’s worth asking a simple question: could a stronger visual control have caught this? Often, this requires a mindset shift that forces the team to push back against the first answer that comes to mind — namely, that the person or people who made the error need to “do better” and read the cues in front of them.

Nobody clocked in with the goal of making an avoidable mistake. Therefore, the more useful question to ask when failures occur is this: How did the system in front of the operator fail them?

Time to Put Up

In Part 1 of this series, on wallpaper, we made the case that design determines how long a visual system stays useful. This piece, on refreshing visuals, laid out a process for review and renewal.

But speaking with authority on lean visual systems wouldn’t feel earned without putting up some examples from our own shop floor. In Part 3, we’ll present some of the boards we actually use, the decisions behind how we built them, and what it takes to keep them from turning into wallpaper.