Things Aren’t Always What They Seem

In 2011, Armstrong’s Marietta ceiling plant was utilizing technical resources and replacement workers to run the plant. Management and the labor union were unable to come to an agreement around their contract, and for seven months, the union workers were locked out.

During that time, I assisted with day to day production operations, maintenance activities, and many process improvements. I worked all over the plant, identifying and implementing as many improvement projects as possible. I was extremely motivated, as the projects improved safety, quality, and productivity for the rest of the plant. The work helped me through the long days, energizing me as I could see instant results from my efforts.  Others were mostly happy with my work. I say mostly, because not everything worked as planned or as expected.  This one of those stories.

The Lamination Line

One of the most critical lines in the plant was the lamination line. It put a top layer on the ceiling tiles. Customers were willing to pay a premium for these tiles. The lamination line was producing at a lower than budgeted rate and had a large amount of downtime. I decided to see if I could help reduce the downtime and increase the production rate.

When I arrived at the line, I met with Wayne, an innovation scientist who was running the line and teaching others to operate it efficiently. We discussed the issues causing line downtime and reduced output rate, then he gave me a tour of the line. On the tour, it became apparent that the position of the board as it enters the laminating process was most critical. I noticed boards were entering the process at an angle. Wayne told me most of the time the angled board could be cut into usable pieces and when it appeared to be too much of an angle, he would stop the line and make adjustments.

I took a look at the conveyer before the laminating process and noticed a series of angled rolls. These rolls were angled to move the board over to one side of the conveyer and keep it against a guiding rail. There were 36 total rolls along the conveyer, and of those, 28 were angled. I believed there were too many angled rolls. They were driving the board at an angle past the guide rail, keeping the board from entering the laminating process squarely.

A New Way to Roll

I asked Wayne if he was willing to try an experiment. I wanted to straighten out most of the rolls, leaving just a few angled rolls. The board would be driven to the guide rail using the angled rolls and then the straight rolls would keep it straight as it entered the laminating process. Wayne asked me how long it would take. I estimated four hours of effort with his help and the help of a mechanic. The line was scheduled to be down for maintenance the next day. If we could do the work then, he would be happy to help.

The next day we started the work with the help of a mechanic. We identified the center of the laminating process and positioned the guide rail parallel to the direction of travel of the board into the process. Next, we moved the guide rail to the optimal position to guarantee the board would be centered entering the process. We marked the original position and current position, just in case we had any issues. Next, we started straightening the rolls.

An engineer came by to see what we were doing. When I explained, he told me he had installed the laminator a few years back and was responsible for all of the angled rolls. He didn’t agree with what we were doing and tried to convince us to stop our work and put everything back. I assured him we were experimenting and were willing to put everything back to its original position if necessary. Although he didn’t seem satisfied, he decided to go elsewhere while we did our work.

Sometimes Less is More

After just under four hours, we were done. Before starting up the line, I called the engineer to see if he wanted to see the results of our experiment. He said he would come over later that day. We didn’t want to wait, so we started up the line and sent some test boards down the line. The first time, we had a jam. When we looked at the cause, we realized the new position of the rolls and the guide rail had an adverse effect on equipment on the other side of the line. We shut down the line and made some adjustments to take into account the new arrangement.

On our next attempt, the test boards entered the laminating process in a straight and square fashion. We were excited, but weren’t ready to declare victory. We started up the line and put it into production. We were amazed, the boards were not only going in exactly as we hoped, but they were spaced out more evenly as they came down the line. Wayne was excited and now wanted to speed up the line. He made small changes to speed until the line was running 20% faster than it had ever run. Right in the middle of this, the engineer came by to see what had happened. He was surprised things were going so well, but admitted he had angled so many rolls without considering the impact on the overall process. He then said, “Maybe less is more - too much of a good thing may be a bad thing.”

Over the next few months, we made additional improvements to the laminating process and the plant had a much more productive and safe operation than before we started.