Operations & Management
Lean and green: Use lean manufacturing principles to deliver green results
March 25, 2014 by Dr. Timothy D. Hill
One of my heroes from the lean and quality movement, Japanese organizational theorist Masaaki Imai, used to say this about successful lean and kaizen implementation: “My definition of lean is to employ minimum resources for the maximum benefits. Therefore, kaizen leads to lean, and lean leads to green. Kaizen is the most environmentally friendly approach.”
While there’s no doubt that lean results in lowered waste, material and labour costs, there is less discussion about the benefits of lean in relation to green manufacturing, warehousing, the office, health care and the like. Consumers, regulators, shareholders and stakeholders are all asking for more sustainability. It’s a different world than it was even 10 years ago.
Here are a few examples of results cited in the U.S. Environmental Protection Agency’s “The Lean and Energy Toolkit”:
• From 2005-2007, General Electric reduced greenhouse gas emissions by 250,000 metric tons and saved $70 million in energy costs.
• A Baxter International facility combined lean/Six Sigma and energy-efficiency efforts to save $300,000 in energy costs in one year.
• Toyota Motor Manufacturing North America has reduced average facility energy consumption per vehicle by 30 per cent since 2000. In fact, Toyota has reduced its landfill contribution down to functionally zero, and achieved ISO 14000 certification because of it.
It’s interesting that these three companies are bridging the continuous improvement gap between operational performance and environmental performance. It’s true that when many of us implement lean in our organizations, we try focus on easy-to-change items all the way up to equipment reliability. Embracing lean and green manufacturing requires giving more focus to environmental and energy concerns than just the implementation of reliability improvement projects.
It’s easy to do, but it requires a subtle change in perspective. Improvements geared toward equipment reliability have distinct linkages to environmental performance, such as reducing the amount of product and raw material waste through:
• The elimination of catastrophic breakdowns through formalized root cause analysis;
• Providing routine monitoring of system parameters through predictive technologies; and
• Preventing interruptions to production cycles with a focus on overall equipment effectiveness.
From lean to green
The similarity between lean and green is waste. So it should make sense that to achieve higher levels of environmental performance, your organization must first adopt the principles and practices of lean. Two examples from the EPA’s research on lean and the environment help to illustrate this point.
• Eastman Kodak conducted numerous lean kaizen events focused on energy reductions by asking “what do we use energy to do?” They found that over the seven-year period, energy reductions resulted in savings of nearly $15 million.
• Baxter International Healthcare Corporation used value stream mapping. In one plant, 96 opportunities for environmental impact improvement were identified, prioritized and implemented, with an estimated energy reduction value of 170,000 gallons of water per day.
Other lean concepts, such as operator care, kanban and SMED, can potentially improve the environmental performance of your organization as well.
Operator care programs focus on developing standard work within the operating units to decrease variation, which reduces the amount of product and raw materials waste. For example, a global leader in alumina refining and manufacturing of aluminum products successfully reduced energy consumption as a result of training operators in better standards of loading, starting and operating manufacturing equipment.
Kanban is designed to provide the right materials at the right time to support manufacturing needs. Kanban reduces excessive inventories of raw or work-in-process materials. Cell-based manufacturing processes that signal a pull for materials based on the demand for product can significantly reduce raw material consumption, decreasing the amount of waste material delivered to landfills, as well as reducing the demand on raw material resources.
SMED, or single minute exchange of dies, has the potential to reduce the amount of waste generated from raw and unprocessed materials left over in manufacturing processes. For example, an aluminum door and window manufacturing facility found that they could reduce the amount of paint wasted per changeover from 50 gallons per day to less than 10 gallons. Paint disposal costs dropped by as much as $280,000 annually, and paint and solvent disposal were reduced by more than 40 per cent.
So add some green to your lean by looking over the next horizon and thinking about what else you might achieve in your lean efforts. It might be reducing your landfill contributions by composting, using less cardboard packaging by using totes that are standardized, or by reducing the work-in-process that leads to waste.
From the bookshelf
Lean and Green: Profit for Your Workplace and the Environment
By Pamela J. Gordon
The main point that Gordon makes is that if you reduce waste and increase recycling, it will be good for the environment and for profits. It’s really as simple as that. Plus, if you’ve already started your lean journey, enhancing that journey to increase recycling shouldn’t be that hard.
There’s still a sense out there that business profitability and environmental responsibility are at odds with each other. In much the same way as we’re not able to see the truly transformational nature of the introduction of the Toyota Production System (TPS) because it was so long ago, we’re still holding on to this belief. Toyota turned the world on its ear when it brought forward TPS, and most everything that they did was very innovative, even if today we take some elements of TPS for granted.
Gordon proves that capitalism and environmentalism are not mutually exclusive. She shows how green business practices enable organizations to save millions of dollars each year with more than 100 examples of how it’s been done. She details such waste-saving, profit-building acts as basic as digging out usable pre-worn shoe covers to wear in the clean room, and as broad as the city of Santa Monica paving residential streets with white top to reduce urban heat and increase surface longevity. These ideas all came from those closest to production, a key tenet of lean.
Many business leaders have invested time, energy, attention and financial resources in environmental protection, but sometimes their efforts are not consistent, appreciated or even encouraged. To her credit, Gordon personally visited 16 of the companies cited, adding a higher degree of authenticity to her work and this book.
In short, this is a well-researched and very readable, practical guide aimed at people just beginning their journey. It proves that integrating environmentally friendly processes and procedures in manufacturing operations is not only necessary for code compliance and corporate public relations, but can also improve a company’s financial performance.
Question from the floor
Question: We’re starting our lean initiative with a kaizen approach. We’re getting people to come up with small improvement suggestions and then letting them take care of these issues. We started off good, but our progress has really slowed. Can you help?
Answer: Henry Ford once said, “Whether you think you can or that you can’t, you are usually right.” I’m guessing that you started off picking the low-hanging fruit and moved quickly on to more complex issues. You have to shift your collective mindset from talking about why this won’t work to reframing the discussion around making it work. I would also suggest getting everyone together and asking them to list the things that they welcome from this new kaizen initiative, as well as the things that they’re afraid of. I’ve done this in diverse areas — from manufacturing to health care — and the answers may surprise you. Mostly people are afraid of changes to their routine. Take care to point out the items that you want to reduce or eliminate. Make sure that they’ve got some vested interest in this list. It’s not all about maximizing profit. Include items such as unsafe work, high-risk items, high boredom items and the like. Show them that they will be improving their working lives. Lastly, try to move forward at a reasonable pace. I’ve seen too many senior leaders push their employees too quickly.
Dr. Timothy Hill is an Industrial and Organizational Psychologist and Certified Lean Six Sigma Black Belt with global expertise in Human Resources/Human Capital. He can be reached at firstname.lastname@example.org.
This column originally appeared in the March/April 2014 issue of Manufacturing AUTOMATION.