What is Six Sigma? :What is Six Sigma?


Basics :Basics A new way of doing business Wise application of statistical tools within a structured methodology Repeated application of strategy to individual projects Projects selected that will have a substantial impact on the ‘bottom line’


Slide 3:A scientific and practical method to achieve improvements in a company Scientific: Structured approach. Assuming quantitative data. Practical: Emphasis on financial result. Start with the voice of the customer. “Show me the data” ”Show me the money” Six Sigma


Slide 4:Six Sigma Methods Production Design Service Purchase HRM Administration Quality Depart. Management M & S IT Where can Six Sigma be applied?


Slide 5:DOE SPC Knowledge Management Benchmarking The Six Sigma Initiative integrates these efforts Improvement teams Problem Solving teams ISO 9000 Strategic planning and more


‘Six Sigma’ companies :‘Six Sigma’ companies Companies who have successfully adopted ‘Six Sigma’ strategies include:


GE “Service company” - examples :GE “Service company” - examples Approving a credit card application Installing a turbine Lending money Servicing an aircraft engine Answering a service call for an appliance Underwriting an insurance policy Developing software for a new CAT product Overhauling a locomotive


Slide 8:“the most important initiative GE has ever undertaken”. Jack Welch Chief Executive Officer General Electric In 1995 GE mandated each employee to work towards achieving 6 sigma The average process at GE was 3 sigma in 1995 In 1997 the average reached 3.5 sigma GE’s goal was to reach 6 sigma by 2001 Investments in 6 sigma training and projects reached 45MUS$ in 1998, profits increased by 1.2BUS$ General Electric


Slide 9:“At Motorola we use statistical methods daily throughout all of our disciplines to synthesize an abundance of data to derive concrete actions…. How has the use of statistical methods within Motorola Six Sigma initiative, across disciplines, contributed to our growth? Over the past decade we have reduced in-process defects by over 300 fold, which has resulted in cumulative manufacturing cost savings of over 11 billion dollars”*. Robert W. Galvin Chairman of the Executive Committee Motorola, Inc. MOTOROLA *From the forward to MODERN INDUSTRIAL STATISTICS by Kenett and Zacks, Duxbury, 1998


Positive quotations :Positive quotations “If you’re an average Black Belt, proponents say you’ll find ways to save $1 million each year” “Raytheon figures it spends 25% of each sales dollar fixing problems when it operates at four sigma, a lower level of efficiency. But if it raises its quality and efficiency to Six Sigma, it would reduce spending on fixes to 1%” “The plastics business, through rigorous Six Sigma process work , added 300 million pounds of new capacity (equivalent to a ‘free plant’), saved $400 million in investment and will save another $400 million by 2000”


Negative quotations :Negative quotations “Because managers’ bonuses are tied to Six Sigma savings, it causes them to fabricate results and savings turn out to be phantom” “Marketing will always use the number that makes the company look best …Promises are made to potential customers around capability statistics that are not anchored in reality” “ Six Sigma will eventually go the way of the other fads”


Slide 12:Barrier #1: Engineers and managers are not interested in mathematical statistics Barrier #2: Statisticians have problems communicating with managers and engineers Barrier #3: Non-statisticians experience “statistical anxiety” which has to be minimized before learning can take place Barrier # 4: Statistical methods need to be matched to management style and organizational culture Barriers to implementation


Slide 13:Technical Skills Soft Skills Statisticians Master Black Belts Black Belts Quality Improvement Facilitators BB MBB


Reality :Reality Six Sigma through the correct application of statistical tools can reap a company enormous rewards that will have a positive effect for years or Six Sigma can be a dismal failure if not used correctly ISRU, CAMT and Sauer Danfoss will ensure the former occurs


Six Sigma :Six Sigma The precise definition of Six Sigma is not important; the content of the program is A disciplined quantitative approach for improvement of defined metrics Can be applied to all business processes, manufacturing, finance and services


Focus of Six Sigma* :Focus of Six Sigma* Accelerating fast breakthrough performance Significant financial results in 4-8 months Ensuring Six Sigma is an extension of the Corporate culture, not the program of the month Results first, then culture change! *Adapted from Zinkgraf (1999), Sigma Breakthrough Technologies Inc., Austin, TX.


Six Sigma: Reasons for Success :Six Sigma: Reasons for Success The Success at Motorola, GE and AlliedSignal has been attributed to: Strong leadership (Jack Welch, Larry Bossidy and Bob Galvin personally involved) Initial focus on operations Aggressive project selection (potential savings in cost of poor quality > $50,000/year) Training the right people


The right way! :The right way! Plan for “quick wins” Find good initial projects - fast wins Establish resource structure Make sure you know where it is Publicise success Often and continually - blow that trumpet Embed the skills Everyone owns successes


The Six Sigma metric :The Six Sigma metric


Consider a 99% quality level :Consider a 99% quality level 5000 incorrect surgical operations per week! 200,000 wrong drug prescriptions per year! 2 crash landings at most major airports each day! 20,000 lost articles of mail per hour!


Not very satisfactory! :Not very satisfactory! Companies should strive for ‘Six Sigma’ quality levels A successful Six Sigma programme can measure and improve quality levels across all areas within a company to achieve ‘world class’ status Six Sigma is a continuous improvement cycle


Slide 22:Scientific method (after Box)


Improvement cycle :23 Improvement cycle PDCA cycle Plan Do Check Act


Slide 24:Prioritise (D) Measure (M) Interpret (D/M/A) Problem (D/M/A) solve Improve (I) Hold gains (C) Alternative interpretation


Slide 25: Statistical background Target = m Some Key measure


Slide 26:+ / - 3 s Statistical background Target = m ‘Control’ limits


Slide 27:+ / - 3 s L S L U S L Statistical background Required Tolerance Target = m


Slide 28:+ / - 3 s + / - 6 s L S L U S L Statistical background Tolerance Target = m Six-Sigma


Slide 29:+ / - 3 s + / - 6 s L S L U S L p p m 1 3 5 0 p p m 1 3 5 0 Statistical background Tolerance Target = m


Slide 30:+ / - 3 s + / - 6 s L S L U S L p p m 0 . 0 0 1 p p m 1 3 5 0 p p m 1 3 5 0 p p m 0 . 0 0 1 Statistical background Tolerance Target = m


Statistical background :Statistical background Six-Sigma allows for un-foreseen ‘problems’ and longer term issues when calculating failure error or re-work rates Allows for a process ‘shift’


Slide 32:L S L 0 p p m p p m 3 . 4 1 . 5 s U S L p p m 3 . 4 p p m 6 6 8 0 3 m + / - 6 s Statistical background Tolerance


Slide 33:Performance Standards 2 3 4 5 6 308537 66807 6210 233 3.4 ? PPM 69.1% 93.3% 99.38% 99.977% 99.9997% Yield Process performance Defects per million Long term yield Current standard World Class


Slide 34:Number of processes 3s 4s 5s 6s 1 10 100 500 1000 2000 2955 93.32 50.09 0.1 0 0 0 0 99.379 93.96 53.64 4.44 0.2 0 0 99.9767 99.77 97.70 89.02 79.24 62.75 50.27 99.99966 99.9966 99.966 99.83 99.66 99.32 99.0 First Time Yield in multiple stage process Performance standards


Slide 35:Benefits of 6s approach w.r.t. financials Financial Aspects


Six Sigma and other Quality programmes :Six Sigma and other Quality programmes


Comparing three recent developments in “Quality Management” :Comparing three recent developments in “Quality Management” ISO 9000 (-2000) EFQM Model Quality Improvement and Six Sigma Programs


ISO 9000 :ISO 9000 Proponents claim that ISO 9000 is a general system for Quality Management In fact the application seems to involve an excessive emphasis on Quality Assurance, and standardization of already existing systems with little attention to Quality Improvement It would have been better if improvement efforts had preceded standardization


Critique of ISO 9000 :Critique of ISO 9000 Bureaucratic, large scale Focus on satisfying auditors, not customers Certification is the goal; the job is done when certified Little emphasis on improvement The return on investment is not transparent Main driver is: We need ISO 9000 to become a certified supplier, Not “we need to be the best and most cost effective supplier to win our customer’s business” Corrupting influence on the quality profession


EFQM Model :EFQM Model A tool for assessment: Can measure where we are and how well we are doing Assessment is a small piece of the bigger scheme of Quality Management: Planning Control Improvement EFQM provides a tool for assessment, but no tools, training, concepts and managerial approaches for improvement and planning


The “Success” of Change Programs? :The “Success” of Change Programs? “Performance improvement efforts … have as much impact on operational and financial results as a ceremonial rain dance has on the weather” Schaffer and Thomson, Harvard Business Review (1992)


Change Management:Two Alternative Approaches :Change Management:Two Alternative Approaches Activity Centered Programs Result Oriented Programs Change Management Reference: Schaffer and Thomson, HBR, Jan-Feb. 1992


Activity Centered Programs :Activity Centered Programs Activity Centered Programs: The pursuit of activities that sound good, but contribute little to the bottom line Assumption: If we carry out enough of the “right” activities, performance improvements will follow This many people have been trained This many companies have been certified Bias Towards Orthodoxy: Weak or no empirical evidence to assess the relationship between efforts and results


No Checking with Empirical Evidence, No Learning Process :No Checking with Empirical Evidence, No Learning Process ISO 9000


An Alternative: Result-Driven Improvement Programs :An Alternative: Result-Driven Improvement Programs Result-Driven Programs: Focus on achieving specific, measurable, operational improvements within a few months Examples of specific measurable goals: Increase yield Reduce delivery time Increase inventory turns Improved customer satisfaction Reduce product development time


Result Oriented Programs :Result Oriented Programs Project based Experimental Guided by empirical evidence Measurable results Easier to assess cause and effect Cascading strategy


Why Transformation Efforts Fail! :Why Transformation Efforts Fail! John Kotter, Professor, Harvard Business School Leading scholar on Change Management Lists 8 common errors in managing change, two of which are: Not establishing a sense of urgency Not systematically planning for and creating short term wins


Six Sigma Demystified* :Six Sigma Demystified* Six Sigma is TQM in disguise, but this time the focus is: Alignment of customers, strategy, process and people Significant measurable business results Large scale deployment of advanced quality and statistical tools Data based, quantitative *Adapted from Zinkgraf (1999), Sigma Breakthrough Technologies Inc., Austin, TX.


Keys to Success* :Keys to Success* Set clear expectations for results Measure the progress (metrics) Manage for results *Adapted from Zinkgraf (1999), Sigma Breakthrough Technologies Inc., Austin, TX.


Key personnel in successful Six Sigma programmes :Key personnel in successful Six Sigma programmes


Black Belts :Black Belts Six Sigma practitioners who are employed by the company using the Six Sigma methodology work full time on the implementation of problem solving & statistical techniques through projects selected on business needs become recognised ‘Black Belts’ after embarking on Six Sigma training programme and completion of at least two projects which have a significant impact on the ‘bottom-line’


Slide 52:Black Belt required resources Training in statistical methods. Time to conduct the project! Software to facilitate data analysis. Permissions to make required changes!! Coaching by a champion – or external support. Black Belt requirements


Slide 53:In other words the Black Belt is Empowered. In the sense that it was always meant! As the theroists have been saying for years! Black Belt role!


Champions or ‘enablers’ :Champions or ‘enablers’ High-level managers who champion Six Sigma projects they have direct support from an executive management committee orchestrate the work of Six Sigma Black Belts provide Black Belts with the necessary backing at the executive level


Further down the line - after initial Six Sigma implementation package :Further down the line - after initial Six Sigma implementation package Master Black Belts Black Belts who have reached an acquired level of statistical and technical competence Provide expert advice to Black Belts Green Belts Provide assistance to Black Belts in Six Sigma projects Undergo only two weeks of statistical and problem solving training


Six Sigma instructors (ISRU) :Six Sigma instructors (ISRU) Aim: Successfully integrate the Six Sigma methodology into a company’s existing culture and working practices Key traits Knowledge of statistical techniques Ability to manage projects and reach closure High level of analytical skills Ability to train, facilitate and lead teams to success, ‘soft skills’


Six Sigma training package :Six Sigma training package


Aim of training package :Aim of training package To successfully integrate Six Sigma methodology into Sauer Danfoss’ culture and attain significant improvements in quality, service and operational performance


Slide 59:DMAIC Six-Sigma - A “Roadmap” for improvement


Slide 60:Define Throughput time project 4 months (full time) Example of a Classic Training strategy


ISRU program content :ISRU program content Week 1 - Six Sigma introductory week (Deployment phase) Weeks 2-5 - Main Black Belt training programme Week 2 - Measurement phase Week 3 - Analysis phase Week 4 - Improve phase Week 5 - Control phase Project support for Six Sigma Black Belt candidates Access to ISRU’s distance learning facility


Draft training schedule :Draft training schedule


Training programme delivery :Training programme delivery Lectures supported by appropriate technology Video case studies Games and simulations Experiments and workshops Exercises Defined projects Delegate presentations Homework!


5 weeks of training :5 weeks of training


Deployment (Define) phase :Deployment (Define) phase Topics covered include Team Roles Presentation skills Project management skills Group techniques Quality Pitfalls to Quality Improvement projects Project strategies Minitab introduction


Measurement phase :Measurement phase Topics covered include: Quality Tools Risk Assessment Measurements Capability & Performance Measurement Systems Analysis Quality Function Deployment FMEA


Example - QFD :Example - QFD A method for meeting customer requirements Uses tools and techniques to set product strategies Displays requirements in matrix diagrams, including ‘House of Quality’ Produces design initiatives to satisfy customer and beat competitors


QFD can reduce :Lead-times - the time to market and time to stable production Start-up costs Engineering changes QFD can reduce


Analysis phase :Analysis phase Topics include: Hypothesis testing Comparing samples Confidence Intervals Multi-Vari analysis ANOVA (Analysis of Variance) Regression


Improvement phase :Improvement phase Topics include: History of Design of Experiments (DoE) DoE Pre-planning and Factors DoE Practical workshop DoE Analysis Response Surface Methodology (Optimisation) Lean Manufacturing


Example - Design of Experiments :Example - Design of Experiments What can it do for you? Minimum cost Maximum output


What does it involve? :What does it involve? Brainstorming sessions to identify important factors Conducting a few experimental trials Recognising significant factors which influence a process Setting these factors to get maximum output


Control phase :Control phase Topics include: Control charts SPC case studies EWMA Poka-Yoke 5S Reliability testing Business impact assessment


Example - SPC (Statistical Process Control) - reduces variability and keeps the process stable :Example - SPC (Statistical Process Control) - reduces variability and keeps the process stable Disturbed process Natural process Temporary upsets Natural boundary Natural boundary


Results of SPC :Results of SPC An improvement in the process Reduction in variation Better control over process Provides practical experience of collecting useful information for analysis Hopefully some enthusiasm for measurement!


Project support :Project support Initial ‘Black Belt’ projects will be considered in Week 1 by Executive management committee, ‘Champions’ and ‘Black Belt’ candidates Projects will be advanced significantly during the training programme via: continuous application of newly acquired statistical techniques workshops and on-going support from ISRU and CAMT delivery of regular project updates by ‘Black Belt’ candidates


Slide 78:Black Belt Training Application Review ISRU ISRU, Champion ISRU, Champion Project execution


Slide 79:Traditional Six Sigma Project leader is obliged to make an effort. Set of tools . Focus on technical knowledge. Project leader is left to his own devices. Results are fuzzy. Safe targets. Projects conducted “on the side”. Black Belt is obliged to achieve financial results. Well-structured method. Focus on experimentation. Black Belt is coached by champion. Results are quantified. Stretched targets. Projects are top priority. Conducting projects


Slide 80:The right support + The right projects + The right people + The right tools + The right plan = The right results


Champions Role :Champions Role Communicate vision and progress Facilitate selecting projects and people Track the progress of Black Belts Breakdown barriers for Black Belts Create supporting systems


Champions Role :Champions Role Measure and report Business Impact Lead projects overall Overcome resistance to Change Encourage others to Follow


Slide 83:Define Select: - the project the process the Black Belt the potential savings time schedule team Project selection


Slide 84:Projects may be selected according to: A complete list of requirements of customers. A complete list of costs of poor quality. A complete list of existing problems or targets. Any sensible meaningful criteria Usually improves bottom line - but exceptions Project selection


Key Quality Characteristics “CTQs” :Key Quality Characteristics “CTQs” How will you measure them? How often? Who will measure? Is the outcome critical or important to results?


Outcome Examples :Outcome Examples Reduce defective parts per million Increased capacity or yield Improved quality Reduced re-work or scrap Faster throughput


Key Questions :Key Questions Is this a new product - process? Yes - then potential six-sigma Do you know how best to run a process? No - then potential six-sigma


Key Criteria :Key Criteria Is the potential gain enough - e.g. - saving > $50,000 per annum? Can you do this within 3-4 months? Will results be usable? Is this the most important issue at the moment?


Why is ISRU an effective Six Sigma practitioner? :Why is ISRU an effective Six Sigma practitioner?


Slide 90:Because we are experts in the application of industrial statistics and managing the accompanying change We want to assist companies in improving performance thus helping companies to greater success We will act as mentors to staff embarking on Six Sigma programmes Reasons


INDUSTRIAL STATISTICSRESEARCH UNIT :INDUSTRIAL STATISTICSRESEARCH UNIT We are based in the School of Mechanical and Systems Engineering, University of Newcastle upon Tyne, England


Mission statement :Mission statement "To promote the effective and widespread use of statistical methods throughout European industry."


The work we do can be broken down into 3 main categories: :The work we do can be broken down into 3 main categories: Consultancy Training Major Research Projects All with the common goal of promoting quality improvement by implementing statistical techniques


Consultancy :Consultancy We have long term one to one consultancies with large and small companies, e.g. Transco Prescription Pricing Agency Silverlink To name but a few


Training :Training In-House courses SPC QFD Design of Experiments Measurement Systems Analysis On-Site courses As above, tailored courses to suit the company Six Sigma programmes


European projects :European projects The Unit has provided the statistical input into many major European projects Examples include - Use of sensory panels to assess butter quality Using water pressures to detect leaks Assessing steel rail reliability Testing fire-fighter’s boots for safety


European projects :European projects Eurostat - investigating the multi-dimensional aspects of innovation using the Community Innovation Survey (CIS) II - 17 major European countries involved -determining the factors that influence innovation Certified Reference materials for assessing water quality - validating EC Laboratories New project - ‘Effect on food of the taints and odours in packaging materials’


Typical local projects :Typical local projects Assessment of environmental risks in chemical and process industries Introduction of statistical process control (SPC) into a micro-electronics company Helping to develop a new catheter for open-heart surgery via designed experiments (DoE) ‘Restaurant of the Year’ & ‘Pub of the Year’ competitions!


Benefits :Benefits Better monitoring of processes Better involvement of people Staff morale is raised Throughput is increased Profits go up


Examples of past successes :Examples of past successes Down time cut by 40% - Villa soft drinks Waste reduced by 50% - Many projects Stock holding levels halved - Many projects Material use optimised saving £150k pa - Boots Expensive equipment shown to be unnecessary - Wavin


Examples of past successes :Examples of past successes Faster Payment of Bills (cut by 30 days) Scrap rates cut by 80% New orders won (e.g £100,000 for an SME) Cutting stages from a process Reduction in materials use (Paper - Ink)


Distance Learning Facility :Distance Learning Facility


Distance Learning :Distance Learning your time your place your study pattern your pace or Flexible training or Open Learning


Distance Learning :Distance Learning http://www.ncl.ac.uk/blackboard Clear descriptions Step by step guidelines Case studies Web links, references Self assessment exercises in ‘Microsoft Excel’ and ‘Minitab’ Help line and discussion forum Essentially a further learning resource for Six Sigma tools and methodology


Case study :Case study


Slide 106:Roast Cool Grind Pack Coffee beans Sealed coffee Moisture content Savings: Savings on rework and scrap Water costs less than coffee Potential savings: 500 000 Euros Case study: project selection


Slide 107:Select the Critical to Quality (CTQ) characteristic Define performance standards Validate measurement system Case study: Measure


Slide 108:Moisture contents of roasted coffee 1. CTQ Unit: one batch Defect: Moisture% > 12.6% 2. Standards Case study: Measure


Slide 109:Gauge R&R study 3. Measurement reliability Measurement system too unreliable! Case study: Measure So fix it!!


Slide 110:Analyse 4. Establish product capability 5. Define performance objectives 6. Identify influence factors Case study: Analyse


Slide 111:Improvement opportunities


Slide 112:Diagnosis of problem


Slide 113:Brainstorming Exploratory data analysis 6. Identify factors Material Machine Man Method Measure- ment Mother Nature Amount of added water Roasting machines Batch size Reliability of Quadra Beam Weather conditions Moisture% Discovery of causes


Slide 114:Control chart for moisture% Discovery of causes


Slide 115:Roasting machines (Nuisance variable) Weather conditions (Nuisance variable) Stagnations in the transport system (Disturbance) Batch size (Nuisance variable) Amount of added water (Control variable) Potential influence factors A case study


Slide 116:Improve 7. Screen potential causes 8. Discover variable relationships 9. Establish operating tolerances Case study: Improve


Slide 117:Relation between humidity and moisture% not established Effect of stagnations confirmed Machine differences confirmed 7. Screen potential causes Design of Experiments (DoE) 8. Discover variable relationships Case study: Improve


Slide 118:Experiments are run based on: Intuition Knowledge Experience Power Emotions Possible settings for X1 Possible settings for X2 X: Settings with which an experiment is run. X X X X X X X Actually: we’re just trying unsystematical no design/plan How do we often conduct experiments? Experimentation


Slide 119:A systematical experiment: Organized / discipline One factor at a time Other factors kept constant Procedure: X X X X O X X X X X X: First vary X1; X2 is kept constant O: Optimal value for X1. X: Vary X2; X1 is kept constant. : Optimal value (???) X X X X X X X Possible settings for X1 Possible settings for X2 Experimentation


Slide 120:Design of Experiments (DoE)


Advantages of multi-factor over one-factor :Advantages of multi-factor over one-factor


Slide 122:Experiment: Y: moisture% X1: Water (liters) X2: Batch size (kg) A case study: Experiment


Slide 123:Feedback adjustments for influence of weather conditions A case study 9. Establish operating tolerances


Slide 124:A case study: feedback adjustments Moisture% without adjustments


Slide 125:A case study: feedback adjustments Moisture% with adjustments


Slide 126:Control 10. Validate measurement system (X’s) 11. Determine process capability 12. Implement process controls Case study: Control


Slide 127:?long-term = 0.532 Before Results


Slide 128:Benefits of this project ?long-term < 0.100 Ppk = 1.5 This enables us to increase the mean to 12.1% Per 0.1% coffee: 100 000 Euros saving Benefits of this project: 1 100 000 Euros per year Benefits Approved by controller


Slide 129:SPC control loop Mistake proofing Control plan Audit schedule 12. Implement process controls Case study: control Documentation of the results and data. Results are reported to involved persons. The follow-up is determined Project closure


Slide 130:Step-by-step approach. Constant testing and double checking. No problem fixing, but: explanation ? control. Interaction of technical knowledge and experimentation methodology. Good research enables intelligent decision making. Knowing the financial impact made it easy to find priority for this project. Six Sigma approach to this project


Re-cap I! :Re-cap I! Structured approach – roadmap Systematic project-based improvement Plan for “quick wins” Find good initial projects - fast wins Publicise success Often and continually - blow that trumpet Use modern tools and methods Empirical evidence based improvement


Re-cap II! :Re-cap II! DMAIC is a basic ‘training’ structure Establish your resource structure - Make sure you know where external help is Key ingredient is the support for projects - It’s the project that ‘wins’ not the training itself Fit the training programme around the company needs - not the company around the training Embed the skills - Everyone owns the successes


ENBIS :ENBIS All joint authors - presenters - are members of: Pro-Enbis or ENBIS. This presentation is supported by Pro-Enbis a Thematic Network funded under the ‘Growth’ programme of the European Commission’s 5th Framework research programme - contract number G6RT-CT-2001-05059