Lean Manufacturing methodology has been around for many years and has been successfully used by many manufacturers to eliminate waste and lower costs. But, in the 21st century there has been a trend in manufacturing towards high-variety, low volume products with options configured for individual customers and even custom engineered per client or plant.
A good example is packaging machinery that is built to plant specifications, and have a good deal of “one-off” engineering for each order.
This is an industry where I spent most of my career and I think that a methodology that is focused on reducing lead times may be a better answer then Lean. There are two compelling reasons:
1. First, lead times and customer delivery dates are a big problem for custom machine builders. These machines -- depending on the amount of custom engineering -- can take anywhere from two to 12 months to complete. Customers who buy these systems often have contractual obligations with other contractors on the project that dictate when machinery will have to arrive at the plant. Other times the delivery is based on payback formulas approved by the board, which are written in stone. OEMS cannot guarantee all of these dates and consequently lose orders and market share.
2. Second, custom engineered machines have a lot more labor hours than standard machines. A good example is a company I will call Arrow Machine. They build custom material handling systems for a wide variety of markets and applications. Their engineering costs are 10 percent of total cost but fabrication is 20 percent and assembly is 30 percent of cost. They found that saving 5 percent on assembly labor hours would increase their gross margin by 1.5 percent, and the savings of 5 percent of the hours would also translate into more production and shorter lead times to take more orders and increase market share.
For these kinds of manufacturers there is another methodology that focuses on reducing lead-times that may be a better answer. It is called Quick Response Manufacturing (QRM). It was invented by Rajan Suri who is the founder of the Quick Response Manufacturing Center at the University of Wisconsin. Rajan says that more then 200 manufacturers have used his QRM methods in the last 15 years.
This does not mean that QRM is an alternative methodology that replaces Lean. Every manufacturer needs a good continuous improvement program regardless of the type of manufacturing. QRM simply compliments Lean, Six Sigma, and other popular methodologies. I just think that the QRM system is a better approach for custom machine manufacturers who need to reduce lead time and labor hours.
QRM vs. Lean Manufacturing
- Lean is a methodology that was derived from the Toyota Production System, which was designed for high volume, repetitive production like automobiles.
- QRM was designed from the ground up for low volume and custom engineered products.
- The driver for Lean is the elimination of waste based on seven types of waste.
- The driver of QRM is the elimination of lead time identified by the critical path of an order.
- In lean methods tools like Takt Time, Standard Work and Level Scheduling target the elimination of variability.
- QRM acknowledges that variability can be a competitive advantage to exploit using QRM tools.
Example -- Columbia Machine is a manufacturer of palletizer machines in Vancouver, WA. These machines are custom engineered and built to the customer’s specifications. Every model is manufactured with options and there are no two machines alike. Being Offering hundreds of different options and special engineering, as well as supply the purchased parts, the brands that each customer uses is a big competitive advantage. They don’t need a methodology that limits variability, but one that supports it.
- Lean uses the Kanban system for material control. It works well for high-volume parts, but is not the best answer for custom or “one-off” parts.
- QRM uses a system called POLCA (Paired-Cell Overlapping Loops of Cards with Authorization) . Kanban uses a card system as a replenish inventory signal, while POLCA uses a card as a capacity signal.
Example -- P&H Manufacturing of Milwaukee, WI builds large custom mining shovels and dragline machines with annual sales of over $1 billion. According to Bob Mueller, the factory manager,”Kanban was simply not an effective option for us. POLCA has been a good fit for our shop. Our process is complex: parts move from cell to cell and sometimes to non-cell areas as well. POLCA keeps all of these areas working together.” During the first year that POLCA was used by P&H it reduced it's WIP by $3million.
- Lean is dedicated to shop floor processes.
- QRM -- Instead of addressing the entire process, QRM focuses on the products that have the best chance of benefit through lead time reductions. This is called the Target Market Segment.
Example -- Charles Casings is a manufacturer of aluminum castings but was losing business due to its spiraling lead times. The company noticed that because of rising fuels costs, there had been a surge in demand for aluminum casings because of their weight advantage over steel. The VP of sales thought that they could gain a significant share of the growing market if they could provide specialized casings with short lead times. There final Target Market Segment was defined as medium sized custom aluminum casings that did not require precision machining.
Time Based Thinking
- Lean Manufacturing is primarily focused on cost-based thinking.
- QRM focuses on time base thinking, which extends beyond the shop floor. It is important that people in all areas of the organization engage in time based thinking and reducing time during the critical path of the order.
Example -- Industrial Valves Corporation had a component that needed to have a special plating process; they had to send the part from the Midwest to the East coast for plating, which took four weeks in the process. Design engineering came up with a new alloy that would allow the component to be made in-house without any plating. This reduced the lead time 67 percent.
- Organizational structures is not a primary objective of Lean.
- Organizational structure, however, is a primary concern of the QRM process.
QRM requires rethinking the organizational structure. Many manufacturers stick to their original functional organizations because they think they are gaining economies of scale, when in fact a different type of organization will substantially reduce lead times.
In his book "Quick Response Manufacturing," Rajan Suri emphasizes that manufacturers must: change the organization of tasks, procedures, equipment, and processes from a functional to a product-oriented basis. In addition he says this requires transforming the structure of the organization from hierarchical with many levels, to flat with cells and teams.
Example- Minster Machine (Minster, OH) manufactures large metal press machines and has been in business since 1896. Despite Minster's dominance in domestic and international markets with press products, management decided the company needed to diversify into other markets and products besides presses to continue to grow in the 21st Century. Minster Machine decided to try the methods of Quick Response Manufacturing (QRM). They decided that had to change from a functional organization with centralized control to an organization with multiple divisions organized around products.
Minster’s new type of organization works well in a dynamic environment, and in new markets. I call this new organization a Prospector organization, organizations are flat, have many business units or divisions, and are decentralized. The new organization utilizes commercially focused, multi-functional groups with the ability to find and exploit new product and market opportunities.
By focusing on new products and new markets, the logical extension of this approach is the product organization in which all resources needed to research, develop, produce, market, and sell related products are placed in self contained organizational divisions.
Minster has now organized itself into seven divisions with their own P & L responsibility. These are: Minster Machinery, Minster Automation, Minster Services, Midwest Industrial Castings, Midwest Machining & Fabrication, Midwest Assembly & Logistics, and Minster Wind.
This decentralized organizational structure is a flat organization with multiple focused teams tasked with commercial goals.
Over time their QRM approach, specifically the implementation of the divisional structure that mimics QRM's Quick Response Office Cells (Q-ROCs), has created new business opportunities, enhanced relationships with customers, and resulted in improved volume and profit.
Other Factors that Define the QRM Approach
Cross Training vs. Specialist Employees
In a functional organization most employees are specialists who know how to do specific jobs very well. They may be experts in setting up a CNC milling machine but unable to work on a CNC lathe. Or they may be assembly technicians who can only work on wiring the machine rather than have skills in hydraulics, pneumatics, PLCS, welding, and the mechanical skills of assembling a complete machine.
What is needed in QRM are people who have continuous training in all of the assembly skills with the primary goal of being a generalist who has the skills to work on any machine or even in other departments.
Another example is Arrow Machine. Arrow’s customers want to specify every purchase part on every machine. This means working with new vendors all of the time and often running into lead time problems. This is a serious problem because many purchase parts would not be available during the start of assembly, thus causing expediting and increases in labor hours.
Arrow Machine solved this problem by moving a buyer from corporate purchasing into the division so that the long lead time purchase parts could be purchased during the engineering process to gain valuable lead time
Quick Response Manufacturing is a process that focuses on reducing lead time. The essence of this process is to get rid of the restraints of the old functional organization whose focus was economies of scale and specialist employees.
It requires a new type of organization that is integrated, uses cross trained workers, and pushes decision making down to the people doing the work. In the area of “one-off” machines QRM can lead to shorter lead times, lower labor hours, increasing profits, and the capacity to accept more orders and increase market share.
Mike Collins is the author of Saving American Manufacturing. His website is www.mpcmgt.com.