A new MAGNET report on managing manufacturing’s multigenerational workforce makes the risk plain: institutional knowledge is one of the most valuable assets on the shop floor, and too much of it still lives in the heads of people nearing retirement.

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A factory can lose its memory overnight.

Sometimes it happens after the retirement cake when a 38-year employee walks out for the last time. The line still runs the next morning, until it doesn’t. A machine starts making the wrong sound. A customer rejects a shipment over a requirement no one wrote down.

The person who knew all of this is now gone. In manufacturing, knowledge loss does not stay theoretical for long. It shows up in downtime, scrap, missed shipments and calls from customers who expected the company to know better.

Manufacturers have always depended on people who carry the real operating system in their heads. They know which machine hates summer humidity. They know which supplier causes trouble during peak season. They know the workaround that keeps a legacy line moving when the manual is useless.

This invaluable knowledge gets built over decades. Much of it now sits with workers who are nearing the end of their careers. Census Bureau research shows how quickly that reality has moved into the plant: the share of manufacturing employees working at companies where at least a quarter of the workforce is 55 or older rose from 14% in 2000 to more than 40% in 2022. And in a Manufacturing Institute survey, 97% of manufacturers expressed concern about brain drain from the aging workforce.

A new MAGNET report on managing manufacturing’s multigenerational workforce makes the risk plain: institutional knowledge is one of the most valuable assets on the shop floor, and too much of it still lives in the heads of people nearing retirement.

That is the work now: moving critical knowledge from individual memory into the operating muscle of the company. Here are six ways to start.

1. Find The People Everyone Calls When The Line Stops

Most companies know who their best people are. Fewer know which pieces of knowledge are trapped inside those people.

If only one person understands how to troubleshoot your most temperamental machine, you have a production risk. If only one supervisor knows the real story behind your largest customer relationship, you have a revenue risk. If only one veteran employee remembers why a previous system upgrade failed, that memory can keep the company from paying twice for the same mistake.

Start with a blunt question: What would we struggle to do if one experienced person left tomorrow?

The answer will usually surface fast. It might be a machine, a customer, a process, a supplier, a safety practice or a workaround no one admits is a workaround because the company depends on it every day.

Skip the generic mentoring program and start by documenting and sharing the knowledge that keeps production moving.

2. Start Before The Retirement Party

Manufacturers prepare carefully for equipment changes, material shortages, customer demand swings and quality issues. Retirements deserve the same planning.

Too often, companies treat retirement as a personnel transition. They post the job. They plan the party. They hope the outgoing employee trains the next person in the final few weeks.

By then, the most valuable knowledge may be hard to extract. The departing employee may not even know how much they know because the work has become second nature.

A better approach starts months, sometimes years, before the departure date. Which processes does this person own informally? Who comes to them for help? What problems do they solve that never appear in the system? What mistakes do they prevent because they have seen them before?

This is critical continuity planning for the shop floor, and it deserves the same discipline manufacturers bring to equipment, quality and safety.

3. Turn Tribal Knowledge Into Plant Knowledge

A manual can explain the steps. It rarely explains the judgment.

Manufacturers need to capture the “why” behind the work. Why does this machine fail after a certain kind of run? Why does this customer reject parts that technically meet spec? Why do we avoid that vendor during peak season?

Those details separate training from wisdom.

The best tools are often simple. Short videos. Recorded walkthroughs. Shadowing notes. Process maps created with the operator, not for the operator. Maintenance logs with context. Customer histories that explain preferences, patterns and past problems.

Don’t ask your best operators to write a manual from memory. Watch them work, record the walkthrough, and capture the judgment in real time.

4. Pair Different Generations On Real Problems

For the first time in history, manufacturers have four generations working side by side on the shop floor. That can create tension. It can also become a practical advantage.

Baby Boomers hold decades of institutional knowledge. Gen X leaders often know how to translate between older systems and newer expectations. Millennials are now deep into leadership and management roles. Gen Z brings fresh eyes, digital fluency and a different set of questions. The opportunity is to put those strengths to work on the same problems.

Pair a veteran operator with a newer employee to reduce scrap. Ask a senior maintenance technician and a Gen Z hire to document a recurring machine issue. Put a younger employee who is comfortable with digital tools alongside an experienced supervisor to improve a reporting process or create a better training tool.

The experienced worker brings pattern recognition. The younger worker brings fresh questions. The company gets a stronger process, and the knowledge moves through the work instead of sitting in one person’s head.

This is the real value of a multigenerational workforce. It gives manufacturers a way to transfer knowledge while improving the work itself.

5. Keep Retirees In The System

Some experienced workers want to retire fully. Others may be willing to stay connected if the company gives them a practical way to do it.

Phased retirements, part-time advisory roles, project-based training, seasonal support and paid documentation work can all help. A veteran employee may not want another full year on the floor. But they may be willing to train a replacement, record troubleshooting videos, review process notes or come back for a few days when a familiar issue resurfaces.

That matters most for small and mid-sized manufacturers, which make up almost 99% of U.S. manufacturing firms. Many do not have layers of backup when a critical employee leaves.

A large corporation may absorb knowledge loss through redundancy. A 75-person manufacturer may feel it immediately. The gap can show up in downtime, quality problems, missed shipments or slower decisions.

Build the bridge while the person is still in the building. Afterward, the company is often trying to reconstruct memory from scraps.

6. Treat Knowledge Like Preventive Maintenance

The hardest part of knowledge transfer is making it a habit.

Production pressure will always compete with teaching. Experienced workers may not share what they know if they feel pushed aside. Younger workers may stop asking questions if they feel dismissed. Managers who reward only output teach the plant to borrow from tomorrow to hit today’s numbers.

Teaching, learning and capturing critical know-how have to become part of the work, not something people squeeze in after the shift is already overloaded.

When a machine fails, document the fix. When a customer issue is solved, capture the backstory. When a veteran worker trains someone, record the lesson. When a process depends on one person’s memory, reduce that risk.

Manufacturers already understand preventive maintenance. They service equipment before it breaks because downtime is expensive. Institutional knowledge deserves the same discipline.

The question every manufacturer should be asking is simple: What do we know today that we could lose tomorrow?

If the answer lives with one person, the risk is very real.

Because a factory does not forget all at once. It forgets in small, expensive ways: a slower fix, a repeated mistake, a missed customer detail, a workaround no one remembers.

The smartest manufacturers will capture what their best people know while they still can. That is how you keep a factory from forgetting how to run.