There are many websites and publications with detailed case-studies documenting the success of companies who have implemented Lean Six Sigma in their operations.
Below are a few examples of some success stories.
Lean Six Sigma important part of Dupont model for Sustainable Growth
Steven P. Bailey recently retired from Dupont after 36 years working for the company. He has a PhD in Statistics and was President and Chairman of the Board of the American Society for Quality (ASQ) 1997-99 In a presentation to the National Lean and Six Sigma Forum, Costa Rica, March 24, 2017, Steven communicated how he saw Lean Six Sigma as a critical part of Dupont's model for Sustainable Growth. In 1999 the CEO of Dupont, Chad Holliday, said “There is one way to execute growth strategies (do things the right way): Six Sigma”. Since that time there was a recognition by Steven P. Bailey and others in Dupont of the key role that Lean principles and tools also play. For this reason Dupont now refer to the total set of principles and tools as 'Lean Six Sigma'. Dupont employs approximately 50,000 people worldwide and its 2015 revenue was US$ 25 billion. OK, you need a definition of 'Sustainability ? Get this...Dupont was founded 215 years ago and is consistently one of the highest revenue and earning generators the world.
Ford Fiesta solve carpet problem with Six Sigma tool
When Ford determined that the appearance of brush marks on its 2011 Fiesta vehicle carpets would be unacceptable to customers, it decided it needed to remove the brush marks when retaining the plushness of the carpet.
A Six Sigma team used a tool called Design of Experiments (DOE) to investigate all the factors that could be the cause of the problem.
When data from 34 experimental runs was analyzed in Minitab, the results revealed complex interactions between the different settings on the equipment used to make the carpet. The interactions explained why previous adjustments to individual settings had failed to find a way to eliminate the problem. The results showed that optimization settings for eliminating brush marks did not have an adverse effect on the plushness. Incredibly, the entire project took 12 days, from the time the problem was defined to the point where the solution was in place and the process was under control.
US Army increases throughput with Lean 6 Sigma program
At the Anniston US Army Depot in Alabama, successful Lean Six Sigma implementation resulted in processes that are more cost effective and less demanding in terms of man-hours. The depot’s bottom line is to continually process high-quality products on time and within constraints
of the budget so equipment can be returned to the war zone quickly at the lowest possible cost to
Due to the current state of war in the Middle East, the depot needs to support a higher demand in workload for receiving and returning equipment to warfighters. The depot’s workload increased from 4 million direct labor hours in 2004 to 6.3 million hours in 2006.
One of the most successful cases of Lean Six Sigma (LSS) implementation is the improvement of the Army Depot’s M1 Abrams tank assembly line. Prior to LSS implementation,
each employee assembled an entire module of the M1 from start to finish in typical vehicle maintenance
“bay style,” in which workers are assigned to and focused on the equipment they’re working on.
After analyzing, organizing and reviewing operations, the Anniston Army Depot determined that a one-piece flow operation could reduce assembly time by 2.2 man-hours for each module and staffing
requirements from five to four workers. Those successful efforts resulted in a reduction throughput time of 56%—from 4.5 days to two days.
After workers at the depot saw how valuable LSS implementation was to that particular process, other
workers began reviewing operations in their areas and analyzed ways to improve performance.
The M2 machine-gun assembly line eliminated waste and transformed work cells to a continuous, one-piece flow system, thus reducing assembly time of the weapon from 2.5 man hours to one and staffing
from 18 to 15. As a result, production increased from 50 to more than 100 machine guns per month.
The most significant finding was that prior to LSS implementation, mechanics spent significant time
chasing down parts. Now, with their improved workstations,
the mechanics are able to focus on doing their job and assembling or fixing equipment.
Other LSS stories published in the Defense Acquisition, Technology and Logistics journal documented
successes across different agencies in the Army. In 2006, the Red River Army Depot in Texarkana, TX,
saved $30 million on its High Mobility Multipurpose Wheeled Vehicle line using LSS, resulting in a higher
rate of production. The depot can now produce 32 mission-ready vehicles per day compared with three a week in 2004.
U.S. Army Recruiting Command also reduced the number of steps it takes to process new recruits by
66%. It also decreased the time it takes to get applicants through the process by 40%.
Positive Impact of lean practices on operations performance and business performance : Some evidence from Indonesian manufacturing companies
An academic research study by:
Gusman Nawanir, Lim Kong Teong and Siti Norezam Othman
School of Technology Management and Logistics,
Universiti Utara Malaysia, Sintok, Malaysia
Purpose – This study aims to investigate the relationship between lean practices, operations
performance (OP), and business performance (BP).
Design/methodology/approach – This survey-based studywas a cross-sectional study.The samples
were drawn by using stratified random sampling procedure from large Indonesian manufacturing
companies based on the directory provided by the Data and Information Center of IndonesianMinistry of
Industry with the final number of respondents of 139. Four main hypotheses were developed and
tested statistically by applying multivariate data analyses.
Findings – The results provided evidence that lean practices should be implemented holistically.
Lean practices have a positive and significant impact on both OP and BP. Moreover, OP partially
mediates the relationship between lean practices and BP.
Research limitations/implications – The data used in this survey represent self-reporting by
mainly the middle or top management in production.
Practical implications – This study contributes to the lean manufacturing (LM) body of knowledge
by identifying the relationships between the LM practices, OP, and BP. Understanding these
relationships will help practitioners in making better decisions in manufacturing organizations as well
as enable application of the concepts in this study to other contexts such as service organizations.
Originality/value – Although there are a growing number of anecdotal and empirical evidences
in favor of LM in manufacturing environment, there has been almost no theory-building and
methodologically rigorous research examining the link between LM, OP, and BP. This study is
addressed to fill this gap.