The Hino factory makes both parts for large medical scanners and small, precision equipment. Compared with similar facilities, its production lines are exceptionally efficient — fast, with less waste, errors and unplanned downtime — thanks in part to the successful integration of advanced digital information technology with operational systems. GE calls this convergence of hardware and software on the shop floor the brilliant factory.
But the brilliance lies less in sensors and radio-frequency identification (RFID) tags than in the approach that guides their use: a deft blending of Lean principles designed to eliminate waste in manufacturing and advanced digitization that enables the constant fine-tuning of production.
In that respect, the Hino plant is where the Industrial Internet meets Kaizen, the Japanese concept of continuous improvement pioneered by Toyota after World War II that undergirds Lean methods for eliminating waste in manufacturing. “What we’re doing is applying digital tools, advanced manufacturing solutions, on top of a Lean foundation,” explains Frederick Mauermann, general manager for global lean manufacturing at GE Healthcare. “That’s the recipe we’ve found that provides the greatest payback.”
The approach is working. Atsushi Morimoto, who runs operations at the Hino plant, says that digitization and Lean manufacturing create powerful synergies that "maximize the effectiveness of the company’s investment." Lead times for some of Hino’s products have shrunk by up to 65 percent. One line produces CT scanner gantries, the big donut-shaped enclosures that surround a patient and contain the scanner’s X-ray tubes and other detectors. When GE Healthcare Japan began operation in 1982, lead time for manufacturing a gantry was nearly a week. Today, that production window is measured in minutes. “
GE has seven of these factories — each of them a laboratory, training location and profitable manufacturing site rolled into one. GE launched the brilliant factory initiative in 2015 and expects to have 18 by the end of the year.
Because operational bottlenecks and other stumbling blocks differ by industry and product, the goals and expected results of digitalization also vary. But the guiding principle is the same across them all: Constantly seek incremental improvements that increase efficiency and quality.
What sets Hino apart is a deep and sustained commitment to Kaizen. By participating in Kaizen workout activities, employees of all levels are empowered to contribute their own insights and test potential operational changes. The factory adheres to the concept of standard work, wherein tasks are clearly defined and repeated many times in order to highlight opportunities to remove inefficiencies.
“If you step into that factory, your biggest takeaway will be the attention to detail and how well defined the standard work is,” Mauermann says. “The team there works constantly to optimize production, which can mean eliminating any need to walk away from the line to find a tool or get a part. They’ve developed ways to bring what they need to them, when they need it.”
Inside the plant, custom kit carts are loaded with the components required for each step, arranged in the order they are used. This reduces unnecessary time and motion and also helps maintain quality standards by ensuring that no parts are forgotten during assembly. Sensors record how the carts are used, and the results are color-coded: green for on-time completion; yellow for delay of a few minutes; and red for a delay of 10 minutes or more.
If complications arise during production, Hino’s “eAndon” (or “eSignal”) system relays a message specifying the time, place and substance of the problem. A worker can generate an alert using a QR code or pull-down menu on a nearby computer terminal — and managers can receive it via a wearable device.
The system allows real-time monitoring of the entire production process — which is especially critical on the manufacturing lines for precision ultrasound probes and CT scanner detectors. This work requires considerable skill and technical knowledge, entails working with lots of tiny parts and permits virtually no margin of error. Some flawed products, like ultrasound probes, cannot be salvaged and must be scrapped.
To avoid such costly errors, the ultrasound probe production line uses sophisticated Enterprise Pulse Insight (EPI) software running on Predix — GE’s software platform for the Industrial Internet — to show workers what they need to know about inventory, output and work in progress (WIP).
Wireless beacons track operator movement in order to optimize equipment layout. Workers are also testing wearable smart glasses to see if they can eliminate the need to lug around laptops or reference materials. The glasses may also enable remote instruction or training for workers.
The attention to detail and precise definition of tasks mesh well with the quick, iterative improvements behind the brilliant factory initiative. “We’re targeting precisely defined tasks for digitization — taking out 30 seconds here, or eliminating five steps there, with some really simple solutions,” Mauermann says. “And because of that, we can be really cost effective about it.”
Each digital solution provides additional data that can then help pinpoint what to target in the next Kaizen activity. It’s circular and progressive at the same time, accelerating the pace of Lean — in effect, making Lean even leaner over time.