the center for industrial effectiveness school of engineering and applied sciences lean/six sigma...
TRANSCRIPT
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The Center for Industrial Effectiveness School of Engineering and Applied Sciences
Lean/Six Sigma OverviewAl Hammonds
for EAS 590, Spring 08
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2The Center for Industrial Effectiveness
Why are we here?
Why do Lean?
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3The Center for Industrial Effectiveness
Lean Thinking
Lean Production = Toyota Production System (TPS)
Identified in a five year ($5 million) MIT study of the worldwide automotive industry
Found that the production system used by Toyota was fundamentally different than traditional mass production
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4The Center for Industrial Effectiveness
Lean Thinking Isn’t New
Lean thinking is more than lean production… it is a business philosophy.
Has roots back to Henry Ford’s production system.
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5The Center for Industrial Effectiveness
Key Definitions
Making product flow through production without interruption.
FLOW
Giving the customer what they want, when they want it, and at the right price.
VALUE
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6The Center for Industrial Effectiveness
Key Definitions
A culture in which everyone is striving to continually improve.
STRIVING FOR EXCELLENCE
A customer demand based method of controlling flow of products or services by replenishing in short intervals.
PULL
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7The Center for Industrial Effectiveness
Inputs Outputs
MEASURABLES• Each independent entity maximizes their efficiency• Batch Process – departments compete
Inventory
Inventory
Process 3Process 1
Rework(Hidden?)
Customer
Process 2
Typical Mass Flow ProcessMaximize Efficiency and Economies of Scale
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8The Center for Industrial Effectiveness
Inputs
Outputs
MEASURABLES• Performance is based on system effectiveness as a whole• Single piece or continuous flow
Process 3Process 1
Customer
Process 2
Lean Production Flow Process Goal: Elimination of Waste
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9The Center for Industrial Effectiveness
How do you provide value to the
customer and make a profit?
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10The Center for Industrial Effectiveness
Defining Value
Value Added Activity
An activity that transforms or shapes material or information (for the first time) to meet customer requirements.
Non-Value Added Activity
Those activities that take time or resources, but do not add to the customer requirements.
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11The Center for Industrial Effectiveness
Exercise
Identify examples of Value Added Activities and
Non-value Added Activities
associated with your work.
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12The Center for Industrial Effectiveness
8 Types of Waste
Waste of Waiting
Waste ofCorrection
Waste of Motion
Waste of Over-Production
Waste of Inventory
Waste of Processing
Waste of MaterialMovement
FLOW
Waste of Intellect
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13The Center for Industrial Effectiveness
Traditional Approach
Ou
tpu
t
Waste
Output
This is not Lean
Cost Plus Mentality
Cost + Profit = Price
Output Output
Output
Was
te Was
te
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14The Center for Industrial Effectiveness
Working Toward Lean
Working Smarter…
Not HarderToday’s Reality
Price – Cost = Profit
Waste
Waste
Waste
Waste
Ou
tpu
t
Ou
tpu
t
Output
Output
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15The Center for Industrial Effectiveness
Lean Thinking Tools
Identify and plot all steps required to do a process. • Challenge every step by asking the “5 WHY’s”
NOTE!! If there doesn’t seem to be a valid reason for any steps identified in the value stream, consider eliminating the steps from the process.
VALUE STREAM MAPPING
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16The Center for Industrial Effectiveness
Lean Thinking Tools
5S’s - Practices that create a workplace suited for visual control and lean manufacturing:
1. Sort (Seiri) = Keep only what is needed2. Straighten (Seiton) = Put everything in order3. Sweep (Seiso) = Clean everything4. Standardize (Seiketsu) = Make standards
obvious – everybody does it the same way5. Sustain (Shitsuke) = Institutionalize and
continual improvement.
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17The Center for Industrial Effectiveness
Lean Thinking Tools
STANDARDIZED WORKThis tool ensures that the best method of conducting each activity is identified and steps are taken to ensure everyone does it this way.
The right people The right steps The right sequence Every time
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18The Center for Industrial Effectiveness
Lean Thinking Tools
MISTAKE PROOFING (Poka-Yoke)Tools and techniques used to prevent people from doing things incorrectly. It can be a simple mechanical device or technique.
Get it right the first time Set people up for success, not failure
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19The Center for Industrial Effectiveness
Lean Thinking Tools
TOTAL PRODUCTIVE MAINTENANCE (TPM)
A series of methods to ensure that every machine in the production process is always able to perform its required tasks without interruption.
Targets key equipment.
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20The Center for Industrial Effectiveness
• On Time Delivery – gives the customers what they want when they want it.
• Flexibility – ability to run different types of products.
• Increased Capacity – provides more actual production time.
• Cycle Time - reducing setup time allows lot size to be reduced, which drives reduced cycle times.
• Costs - reducing Work In Process drives lower operational costs (carrying costs, scrap, rework, space utilization, etc.)
SET UP REDUCTION
Lean Thinking Tools
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21The Center for Industrial Effectiveness
LEVEL SCHEDULING
The goal is to produce at the same pace every day minimizing variation in the workload.
Lean Thinking Tools
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22The Center for Industrial Effectiveness
CELLULAR FLOW
Machines or processes are side by side with very little inventory between them. The goal is efficient, continuous flow.
Lean Thinking Tools
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23The Center for Industrial Effectiveness
OPERATIONS BALANCING
Achieving the best arrangement of people, material, and equipment.
Lean Thinking Tools
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24The Center for Industrial Effectiveness
Lean Thinking Tools
TAKT TIME Takt time sets the pace of production to match the rate of customer demand (sales) and is the heartbeat of the lean system.
Takt Time =Effective Working Time
Customer Requirement
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25The Center for Industrial Effectiveness
Who Should Implement Lean Thinking Principles
Product Development Areas
Order Taking and Scheduling Processes
Manufacturing Operations
Logistics
Administrative Systems
Human Resources
************ EVERYONE! ************
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26The Center for Industrial Effectiveness
Lean Implementation Process
COMMUNICATE &TRAIN
WASTE ELIMINATION5-S/VISUAL CONTROLS
PULL/CELL/ STANDARDIZED WORK
SET UP REDUCTION
LEAN LEVEL SCHEDULING
12-24 Month
s
Leadership & Develop Strategy
VALUE STREAM MAPPING
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27The Center for Industrial Effectiveness
Why Do Lean ?
Companies implementing Lean Thinking report the following improvements:
• Productivity increases 15%-70%
• Rejects (PPM) decrease 50%-250%
• Inventory turns increase 55% - 70%
• Space required decreases 35% - 70%
• Employee involvement increases 70% - 95%
• Annual savings per employee $1,200 - $3,500
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28The Center for Industrial Effectiveness
What Will Lean Mean?
You will attack waste in all its forms.
You will embrace and celebrate continuous improvement.
The only constant is change.
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29The Center for Industrial Effectiveness
Lean is a never ending journey. It is a systematic approach to the identification and elimination of waste and non-value added activities through continual improvement in all products and services.
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The Center for Industrial Effectiveness School of Engineering and Applied Sciences
Six Sigma
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31The Center for Industrial Effectiveness
The History of Six Sigma
1987: Motorola initiates Six Sigma
1988: Some early successes and failures
1993: AlliedSignal embraces Six Sigma
1995: GE adopts Six Sigma (Jack Welch)
1996: Six Sigma starts to grow
2000: Six Sigma continues its evolution
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32The Center for Industrial Effectiveness
What is COPQ ?Quantify the size ($) of the problem in language
that will have impact on upper management
Why is COPQ Important ?Identify major opportunities for cost reduction
Identify opportunities for reducing customer dissatisfaction & associated threats to salability
Stimulate improvements through publication
Prioritize the opportunities
Cost of Poor Quality (COPQ)
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33The Center for Industrial Effectiveness
Profit
Total Cost to manufactureand deliver
products
Profit
TheoreticalCosts
Cost ofPoor Quality
COPQ
Price Erosion
TheoreticalCosts
Cost ofPoor Quality
COPQ
Profit
TheoreticalCosts
COPQ
Which Feels Better??
Why Focus on COPQ?
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34The Center for Industrial Effectiveness
Traditional Quality Costs
Lost Opportunity
Hidden Factory
Additional Costs of Poor Quality
(intangible)
(tangible)
(Difficult or impossible to measure)
More SetupsExpediting CostsLate DeliveryLost SalesLost Customer LoyaltyLong Cycle TimesEngineering Change Orders
Rejects AdministrationInspection DispositionWarranty ConcessionsScrap Rework
Average COPQ approximately 15% of Sales
The Cost of Poor Quality “Iceberg”
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35The Center for Industrial Effectiveness
What is Six Sigma?
A philosophy?
A problem solving methodology?
A set of tools?
A metric?
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36The Center for Industrial Effectiveness
PhilosophyPhilosophyPhilosophyPhilosophy
MetricMetricMetricMetric
MethodologyMethodologyMethodologyMethodology
ToolsToolsToolsTools
Six Sigma Has Four Dimensions
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37The Center for Industrial Effectiveness
Benefits of Six Sigma
Cost-of-Quality decreased - from 30.1% before 1988 - to 7.4% after 1993
Aim for:- 8% Revenue Growth per year- 6% Productivity Improvement per year
forever
Gross Savings of $1,225M in 1998
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38The Center for Industrial Effectiveness
Some Companies Known to be Formally Applying the Six Sigma Methodology
MotorolaTexas InstrumentsAlliedSignalGeneral ElectricSonyDuPontFord Motor Company PolaroidDow ChemicalLockheed MartinToshibaBombardierNoranda/FalconbridgeCitiGroupBMWXeroxRaytheonCoca-ColaICI Explosives
Dell ComputersSeton Medical CentersAmerican ExpressMaytagPioneer Hi-Bred InternationalSeagate TechnologyMillard Refrigerated Services Canadian MarconiAvery DennisonBBA Group PLCCraneKorean Heavy IndustriesNokiaPechineySiebeThermo KingGenCorpIBMMaple Leaf Foods
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39The Center for Industrial Effectiveness
Is 99% Good Enough?
99.99966% Good (6 Sigma)
20k lost articles of mail per hour
Unsafe drinking water for almost 15 minutes each day
5,000 incorrect surgical operations per week
Two short or long landings at most major airports each day
200,000 wrong drug prescriptions each year
No electricity for almost seven hours each month
Seven articles lost per hour
One unsafe minute every sevenmonths
1.7 incorrect surgical operations per week
One short or long landing every five years
68 wrong prescriptions per year
One hour without electricity every 34 years
99% Good (3.8 Sigma)
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40The Center for Industrial Effectiveness
The Goals of Six Sigma
Defect Reduction
Yield Improvement
Customer Satisfactio
n
$
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41The Center for Industrial Effectiveness
Technical SkillsChange Leadership
Six Sigma is About Leadership
20%
80%
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42The Center for Industrial Effectiveness
Per
form
ance
Time
Incremental improvementQuantum
improvement
Six Sigma Projects
Continual Improvement...
Ongoing efforts
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43The Center for Industrial Effectiveness
Performance Umbrella
A Performance A Performance OrganizationOrganization
Change management
Continuous improvement
tools
KaizenISO and QS-9000 practices
Safety practices
Statistical process control
Preventive maintenance
Six SigmaSix Sigma
Lean manufacturing
TQM
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44The Center for Industrial Effectiveness
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Sweet FruitDesign for Manufacturability
Process Entitlement
Bulk of FruitProcess Characterizationand Optimization
Low Hanging FruitSimple Tools
Ground FruitLogic and Intuition
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
We don't know what we don't know
We can't act on what we don't know
We won't know until we search
We won't search for what we don't question
We don't question what we don't measure
Hence, We just don't know
DFSS
Black BeltsLeanGreen Belts
White Belts
“Nike”
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Six Sigma Levels
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45The Center for Industrial Effectiveness
The Infrastructure
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46The Center for Industrial Effectiveness
Roles
Executive
Champion
Process Owner
Master Black Belt
Black Belt
Green Belt
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47The Center for Industrial Effectiveness
Exercise:
You are the GM of a very successful cinema with many employees. You will be out of the country for three months and have asked your staff to fax you a weekly report each Monday morning. What information (measures) would you like to see in that fax?
Hollywood Inc. Weekly Report
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48The Center for Industrial Effectiveness
Exercise:
You are heading to the cinema with some friends . . .
The movie you would like to see is playing in several cinemas in your area. All are about the same travel time from your home, charge the same amount, have the same stadium seating, and are showing movies at the same time. What criteria do you use to choose?
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49The Center for Industrial Effectiveness
Critical to Who’s Satisfaction?
Supplier Perspective(Theatre)
Management) Good Popcorn
No Sticky Floors
Clean Restrooms
Short Lines
Good, funny, entertaining movies
Customer Perspective(Movie Goers)
. . . So why do such differencesin perspective exist ?
Ticket Sales
Concession Sales
Labor/Work Force Costs
Profit Reports
Other...
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50The Center for Industrial Effectiveness
Being Customer Driven
Voice of the Customer
Critical to Quality Characteristics
Process Capability
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51The Center for Industrial Effectiveness
Delighters(Increases consumer loyalty)
Performance(Competitive differentiation)
Must Have’s(Minimum requirements) (based on Kano principles)
Satisfying Customers
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52The Center for Industrial Effectiveness
Maximizing Customer Alignment
Delivery
Price
Quality
NeedNeedDoDo
Cycle Time
Cost
Defects
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53The Center for Industrial Effectiveness
Culture Change - Achieving Critical MassN
um
ber
of
Peo
ple
Implementation Time
Team Members
Green Belts
Black Belts
Master Black Belts
Convert 30% and you’ve got a new organization!!
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54The Center for Industrial Effectiveness
Team Work
The Strength of the Wolf is in the Pack.
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55The Center for Industrial Effectiveness
Advantages of Teams
Greater knowledge & experience base
Different perspectives
More total person power
Social bond, affiliation, identification
Willing to take more risks
Synergy – whole is greater than the sum of its parts
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56The Center for Industrial Effectiveness
DPMO
0.00
0.01
0.10
1.00
10.00
100.00
1,000.00
10,000.00
100,000.00
1,000,000.00
Cross-functional Six Sigma Project Teams
Knowledge sharing triggered by sigma process benchmarks
Intranet-enabled best practices; real-time process metrics
Knowledge Sharing
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57The Center for Industrial Effectiveness
DMAIC Overview
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58The Center for Industrial Effectiveness
DMAIC Overview - Define
Define the Customer, they’re Critical to Quality (CTQ) issues, and the Core Business Process involved.
Define who customers are, what their requirements are for products and services, and what their expectations are
Define project boundaries the stop and start of the process
Define the process to be improved by mapping the process flow
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59The Center for Industrial Effectiveness
What is a 6 Sigma Project
Hard $$
Fact based
Control plan
Systematic approach (apply DMAIC)
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60The Center for Industrial Effectiveness
Problem Solving Comparison
Nike (Just Do It
Projects)Workout Lean Six Sigma
Goal / issue / outcome
Most likely nagging issues, could be
cost or cycle time Cost or cycle time
Improve cycle times, improve VA/NVA ratio, reduce waste
Cost reduction / defect reduction
Cost savings*Less than $25,000 Less than $50,000 Less than $100,000
Greater than $100,000
Time from problem identification to
solution Immediate 1-3 days 1 week 1 to 5 months
Time to implementImmediate
Days to less than 4 weeks
Days to less than 4 weeks Weeks to months
Project initiated by Anyone Anyone Anyone Upper management
ApprovalsWithin department
Within or cross departments Cross departments
Cross departments / Executive staff
Departments affected One One or more One or more One or more
Training None Low Low / medium High
Tools utilizedCommon tools* Common tools*
Common tools*, VSM, Flow, Pull,
Takt Statistical
This matrix represents a very broad approximation to the differences between these problem solving tools.
* Common tools: Pareto, Brainstorming, Team Dynamics, C&E diagrams, Flow Diagrams
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61The Center for Industrial Effectiveness
A Project’s Evolution
30,000 feet
20,000 feet
10,000 feet
Landing
Black Belt
ProjectTeam
Potential Improvement
Topics, Subjects, Ideas
Project Definition and Selection
Sessions
Refinement w/ Stakeholders and diagnosis; enters
project in database
Launch/”start” of project
TeamKick-Off Meeting
Management Project Champions
Pre-Project Define Phase
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62The Center for Industrial Effectiveness
Product focus
4 Types of Project Focus
Example: Critical manufacturing processes Critical transactional processes Critical engineering processes Improving these will save/make $$
Example: Product 1 Product 2 Product 3
Example: Biggest fire to address
Example: Complete x projects to save
$z
Process quality focus
Problem focus
Project cost savings focus
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63The Center for Industrial Effectiveness
Defining Project Metrics
PrimaryPrimary
MetricMetric
BusinessBusiness
Metric(s)Metric(s)
FinancialFinancial
Metric(s)Metric(s)
ConsequentialConsequential
Metric(s)Metric(s)
SecondarySecondary
Metric(s)Metric(s)
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64The Center for Industrial Effectiveness
Y=f(x)
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65The Center for Industrial Effectiveness
DMAIC Overview - Measure
Measure the performance of the Core Business Process involved.
Develop a data collection plan for the process. Collect data from many sources to determine
types of defects and metrics. Compare to customer survey results to
determine shortfall.
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66The Center for Industrial Effectiveness
Optimized Process
Prioritized X’sPrioritized X’s (Step 6)(Step 6)
Vital X’sVital X’s
3-63-6 Key Leverage Key Leverage X’sX’s
Output Variables (y)Output Variables (y)some X’s listed.some X’s listed.
Process MapProcess Map
Brainstorming, FMEA,Brainstorming, FMEA,C&E, Process MapC&E, Process Map
Screening DOE’sScreening DOE’s
DOE’s, RSMDOE’s, RSM
C&E Matrix and FMEAC&E Matrix and FMEAC&E Matrix and FMEAC&E Matrix and FMEA
Gage R&R, CapabilityGage R&R, Capability
4 Block Tools4 Block Tools
Quality SystemsQuality Systems
SPC, Control PlansSPC, Control Plans
MeasureMeasure
AnalyzeAnalyze
ImproveImprove
ControlControl
30 - 5030 - 50
10 - 1510 - 15
4-84-8
8 - 108 - 10
UnknownUnknown
Input Variables to be InvestigatedInput Variables to be InvestigatedInput Variables to be InvestigatedInput Variables to be Investigated
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67The Center for Industrial Effectiveness
Variability
is the ENEMY
“Right the First Time” isthe most cost effective way
to achieve Customer Satisfaction
Variability is the Enemy
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68The Center for Industrial Effectiveness
The Hidden Factory
Most materials go this way
Process Map (macro level)
StoragePrepare for
smelting(crushing...)
StorageMelt in
Reactor
Skim slagMelt in
furnaceDryslag
Store copperbottom
Cool slag atslag dump
Separate slagfrom copper
bottom
Arrival atHorne
Hidden Factory !!!!!
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69The Center for Industrial Effectiveness
Normal Distributionµ
Point of InflectionPoint of Inflection
1
+ -
68.26%95.44%99.74%
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70The Center for Industrial Effectiveness
What is 6 Sigma?
Z = 6 sigmas
= 1.0USL = upper spec. limit
10.0 16.0
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71The Center for Industrial Effectiveness
Practical Interpretation of Sigma Scale
2 Sigma
3 Sigma
31%
6.6%
4 Sigma 0.62%
5 Sigma
6 Sigma
0.023%
0.0003%
% Good Prob. of Defect
4.5 hours/month
2 days/month
9 days/month
10 mins/month
9 sec/month
3.8 Sigma 1.0% 7 hours/month
69%
93.4%
99.4%
99.98%
99.9997%
99.0%
Being without electricity for...
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72The Center for Industrial Effectiveness
Benchmarking Implications
10
100
1000
10000
100000
1000000
3 4 5 6 72
Sigma Scale of Measure
PPM
•
Restaurant Bills
Doctor Prescription Writing
Payroll Processing
Order Write-upJournal Vouchers
Wire Transfers
Airline Baggage Handling
Purchased Material Lot Reject Rate
Domestic Airline Flight
(0.43 PPM)
IRS - Tax Advice (phone-in)(140,000 PPM)
Fatality Rate
Best-in-ClassBest-in-Class
Average Company
Average Company
1
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73The Center for Industrial Effectiveness
DMAIC Overview - Analyze
Analyze the data collected and process map to determine root causes of defects and opportunities for improvement.
Identify gaps between current performance and goal performance
Prioritize opportunities to improve
Identify sources of variation
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74The Center for Industrial Effectiveness
DMAIC Overview - Improve
Improve the target process by designing creative solutions to fix and prevent problems.
Create innovate solutions using technology and discipline.
Develop and deploy implementation plan.
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75The Center for Industrial Effectiveness
Design of Experiments
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76The Center for Industrial Effectiveness
DMAIC Overview - Control
Control the improvements to keep the process on the new course.
Prevent reverting back to the "old way"
Require the development, documentation and implementation of an ongoing monitoring plan
Institutionalize the improvements through the modification of systems and structures (staffing, training, incentives)
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77The Center for Industrial Effectiveness
Six Sigma is a Tool Box
Define Measure Analyze Improve Control
Adult Learning Model
Process Mapping
Multi Vari Variable DOE EVOP
Project Management
Cause & Effect Matrix
Correlation Fractional DOEResponse
Surface DOE
Computer Tools
Fishbone Diagram
RegressionFull and 2k
Factorial DOEMultiple
Regression
Descriptive Statistics
Statistical Analysis
Hypothesis Testing
Advanced DOETransition
Plans
Lean Tools ANOVALogistic
RegressionControl Plans
MSA FMEA SPC
CapabilityControl
Methods
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78The Center for Industrial Effectiveness
The Highest Quality Producer is theLowest Cost Producer…How is this possible?
The Bottom Line