The Lean Six Sigma Guide to Doing More With Less

Cut Costs, Reduce Waste, and Lower Your Overhead

Mark O. George

• Editorial: Wiley
• Año: 2010
• ISBN:
  9780470606582
• Edición: 1
• Categoría: Negocios y empresa
• Categoría: Operaciones

Create New Profits in Any Economy

In this difficult economic climate, it's vital to cut waste that can eat at a company's bottom line and boost efficiency at every organizational level. The traditional business solution in a crisis is to slash away non-critical talent and resources, often doing more harm than good. There is a far better systematic approach to doing more with less.

As a leading expert on Lean Six Sigma and business transformation, with a deep knowledge of its application in countless areas of business, author Mark George can help you use Lean Six Sigma to analyze your operational needs, identify high-impact opportunities, design and rapidly implement solutions, and create a system that will build efficiency and high performance in every area of your business. The Lean Six Sigma Guide to Doing More with Less can help you:

• Improve operating margins by as much as 20%, ROIC by as much as 10%, and reduce the costs of goods sold by as much as 5% or more
• Create "cost intelligence" that uncovers root causes allowing cost reductions without jeopardizing customer service levels and quality
• Use enterprise speed, agility, and flexibility to drive step-change reductions in cost and enable competitive advantage
• Identify and eliminate the costs of complexity in your business
• Supercharge your legacy Six Sigma program, improving speed to results, increasing project values, and shortening completion times

With case examples from a wide array of industry, encompassing decades of experience implementing Lean Six Sigma in every economic climate, in companies of every size, The Lean Six Sigma Guide to Doing More with Less will give your business an intelligent edge in lean times.

CHAPTER 1

WHY USE LEAN SIX SIGMA TO REDUCE COST?

With Michael L. George and Mike Tamilio

Several years ago, a hydraulic hose company that was a Tier 1 supplier of hoses and fittings to the automotive industry found itself barely profitable, generating a negative 2 percent economic profit. A telltale sign: customer order lead time was 14 days when the industry average was 7 days. Yet its leadership, not attuned to the relationship between process velocity and cost, didn’t realize that speed was a main driver of the company’s poor financial performance. In addition to long lead times, the company also suffered from poor quality, and frequently shipped defective brake and steering parts to its primary customers.

In less than two years, the company had made a remarkable turnaround (see Table 1.1).

How were such remarkable results enabled? Through a focus on cost reduction? Partly, but the strategic alignment was around enterprise speed—reducing waste across and between functional units, which brought with it cost reduction and true competitive advantage.

For example, one client was a leading manufacturer of heavy duty trucks. Unlike other customers of this Tier 1 supplier, the truck manufacturer created a high proliferation of end items (mostly low-volume runners) required for its wide variety of truck models. When we helped the hose company complete some complexity analytics (similar to those described in Chapter 10), we discovered that process improvement was not its highest opportunity area. Rather, long manufacturing lead times were caused by having to provide the vast number of part numbers for the truck company. Management at the Tier 1 supplier decided to drop the truck company as a client, eliminate the related complexity, and focus on its remaining clients, those with higher volumes and fewer part numbers.

Table 1.1 Hose Company Results from Lean Six Sigma

Operating Margin	Improved from 5.4% to 13.8%
Capital Turnover	Improved from 2.8 to 3.7
Return on Investment Capital (ROIC)	Improved from 10% to 33%
Enterprise Value (Market Capitalization )	Improved by 225%
EBITDA	Improved by 300%
Economic Profit = ROIC% – WACC%	Improved from (-2%) to + 21%
Work-in-Process (WIP) Inventory Turns	Improved from 23 to 67 turns per year
Customer Order Lead Time	From 14 days to 2 days

Eliminating that complexity allowed the hose company to focus on the next priority: reduce the number of defective brake and steering components shipped to America’s leading automotive companies. So the hose company began an all-out assault on quality, with project identification and selection now prioritized around defect prevention. As shown in Table 1.1, quality improved from 3Sigma to 6Sigma on all critical-to-quality product specifications.

With product quality and consumer safety under control, the company was able to focus attention on Lean speed and flexibility. It launched a series of operations assessments that identified the cause of long process lead times and developed an appropriate mitigation plan that included the synchronized deployment of Lean tools (such as 5S, work cells, process flow improvement, setup reduction, and, eventually, pull systems).

This holistic approach—combining complexity reduction, quality improvement, and the elimination of process waste—delivered remarkable improvements. As noted previously, in less than two years, profit margins had doubled. But a picture is worth a thousand words! Figure 1.1 shows the drop in cost of goods sold as lead times dropped.

Notice that the rate of cost reduction was relatively slow initially, and then accelerated as cycle time was driven down to less than 25 percent of its original value. Based on the initial observations, one would have expected a linear relationship between lead time reduction and its effect on costs. Why did the rate of cost reduction speed up as lead times continued to drop? What was going on?

Figure 1.1 The effects of customer order lead time on manufacturing cost: For the whole company, cost of goods sold fell by 9 percent as the cycle time from the beginning to the end of production was reduced to 35 percent of its original value. At the same time, company profit increased from 7.3 percent on a sales increase of 13.8 percent.

Initially, process improvement projects resulted in reduced cost of poor quality and direct labor cost; savings typically associate with continuous improvement. While these projects were prudent, they yielded relatively small incremental impact to the overall business performance; certainly not enough to provide competitive advantage. You will recall that the hose company’s manufacturing cycle time was initially 14 days on average, compared to its peer group’s cycle time of 7 days (which was also the customer’s accepted lead time).

When the hose company’s lead time reached the peer-group average of 7 days, costs had been improving gradually. But when the company continued to strive for greater speed and reached a 3-day cycle time, the company’s operating performance enabled a structural advantage.

There is, in fact, a threshold of cycle time that is needed to dramatically eliminate cost, to make the step-change from a mere operating advantage to a structure advantage. So the question for leaders becomes how much process velocity is required for our operational advantage to enable a structural advantage? Figure 1.2 reminds us that both of these elements are required to enable substantive reductions in cost.

Customer Dissatisfaction and High Cost Processes Go Hand in Hand

As this hose company’s experience demonstrates, slow processes make unhappy customers. We have been working with several clients to drive consistency, speed, and savings in their commercialization processes and in their sales pipeline. It has also become clear that problems with customer-facing processes are responsible for much customer dissatisfaction. Most companies will go to great lengths to please customers when they complain about a product, but ignore the aggravation that inconsistent responsiveness, delayed contracts, and unfriendly agents cause. A strategic project that focuses on the wastes and variability in these areas will achieve a double victory, reducing costs in critical processes while driving up customer satisfaction.

In this case, once cycle time from start to finish was 50 percent less than the lead time demanded by customers, the company was able to close a large warehouse and quality containment facility. Closing the warehouse allowed the company to greatly reduce an array of costs frequently referred to as the “hidden factory.” These included:

• Inventory

• Capital and equipment

• Energy

• Insurance

• Taxes

• Excess labor

• Transportation

• Handling, product damage

. . . and other costs that added no value from the perspective of the customer.

The correlation between speed and cost—both at a process level and at an enterprise level—is a powerful concept and one that has provided competitive advantage to manufacturing and services companies alike. The lessons we can learn from the hose company are that:

• Process-level speed is important and can confer some operating advantage, but by itself cannot fundamentally shift the cost base of the company.

• Enterprise-level speed and flexibility is where the biggest gains will come from, conveying a structural advantage that will let you supersede your competition, based on both speed and cost (but you can’t achieve enterprise speed without process-level speed).

Figure 1.2 Where operating advantage becomes structural advantage.

Benefits of Speed and Agility

The hose company just described created a true market advantage when it reduced its lead time by 80 percent across all of its products. The changes needed to achieve that velocity and agility also dramatically dropped costs.

While reducing costs is a good thing in its own right, it is also the case that faster cycle times and the flexibility to rapidly deliver all offerings in your portfolio will win more customers in a financial downturn because customers do not want to tie up their money in inventory; nor, in transactional processes, do they want to wait for new products, faster response, and so on.

TRANSACTIONAL EXAMPLE: LEAN SIX SIGMA TRANSFORMING OUR GOVERNMENT

The opportunity for cost reduction through cycle-time reduction was born in manufacturing but has proven to work just as effectively in nonmanufacturing applications. For example, U.S. Naval Aviation was one of the first government organization to implement process improvement across the enterprise. One example of the ability of cycle-time reduction to generate cost reduction occurred at the Naval International Program Office, which provides proposals to allied governments in response to their request for price, delivery, and specs—on an F/A-18, for example. The response originally required 5.5 man-years of effort and ranged from 30 to 392 days to respond. Customers found significant errors in 91 percent of the proposals. Further, a study of naval weapons systems showed a high correlation between cost overruns and excess cycle time.

Through prioritized project identification and selection and the application of Lean Six Sigma, the average response lead time was reduced to 11 days and the error rate to 8 percent. The overall cost of proposal preparation was reduced by 36 percent, and customer satisfaction dramatically improved. The gains were recognized at the highest levels.

THE ALLOY OF HIGH PERFORMANCE: WHY CHOOSE LEAN SIX SIGMA TO REDUCE COST

The more we have tested and implemented the central tenets, tactics, and tools of the combined Lean Six Sigma methodology, the more convinced we’ve become that both are essential to rapid and sustainable cost-cutting. The integration of Lean and Six Sigma is one of the most effective methods for consistently improving cost, speed, and quality, with broad successes in service as well as manufacturing functions. Companies have experienced unprecedented cost savings in diverse areas:

• Feeding higher-quality leads into the sales funnel at a fraction of the cost.

• Reducing developmental timelines for new products by 20 to 50 percent while nearly eliminating the high cost of defects.

• Slicing away complexity and variability throughout the supply chain to yield 10 to 30 percent cost savings while shortening process lead time by as much as 80 percent.

These transformations and cost savings are achieved in three- to five-month projects, a timeline made possible by the powerful combination of Lean speed and Six Sigma quality. The true power of the merger of Lean and Six Sigma as a single solution is in its unsurpassed ability to expose the wastes and complexities that are hidden in underlying processes. Cost-cutting measures can then be sequenced for cascading returns at the organizational level.

Lean Six Sigma is the synthesizing agent of business performance improvement that, like an alloy, is the unification of proven tools, methodologies, and concepts, which forms a unique approach to deliver rapid and sustainable cost reduction.

Alloys form new products of high utility from preexisting materials. But, unlike some alloys that lower the purity and value of the source materials, Lean Six Sigma multiplies the additive value of its elements.

• It’s fast, delivering substantive results literally in a matter of weeks.

• It’s efficient, delivering exceptional reductions in cost with relatively low investment. Companies featured in this book have realized rates of return at the project level equal to 5 times their investment, and rates of return at the program level 12 times or greater.

• It’s effective, providing a mechanism to identify, leverage, and replicate best practices in cost reduction across the enterprise.

• It’s practical, providing fact-based, analytical, straightforward methods used to uncover the root causes of high cost; get waste out of processes; and transform plans into actions.

• It’s game changing, creating competitive advantage in terms of operational cost, customer quality, and enterprise speed:

— Reducing direct labor costs.

— Lowering indirect costs.

— Improving return on assets.

— Accelerating customer order lead times.

— Improving overall customer service levels.

— Enabling enterprise flexibility—responsiveness to changes in customer needs and market demands and economic conditions.

• It builds capability. Whether simple project execution or enterprise transformat...