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Six Sigma and TUR Planning What is Six Sigma? Origin of Six Sigma Improvement Model Tools of Six Sigma Lean Manufacturing
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Six Sigma may be expressed as... 66
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What is 6 ? A level of process variation that would yield 99.99966% good product No more than 3.4 DPM (defects per million parts produced) Business philosophy of continuous improvement
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If 99% were Good Enough... 17,000 pieces of mail lost every hour 30,000 newborn babies would be dropped 200,000 incorrect prescriptions each year Unsafe drinking water 4 days each year No electricity/water/heat for 15 minutes each day We would all be monkeys
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Expected Levels of Defects SigmaShort TermLong Term 33 2,700 DPM68,800 DPM 44 63 DPM5,200 DPM 55 574 DPB280 DPM 2 DPB3.4 DPM
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A picture of 6
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Origin of 6 Created by Motorola in mid 1980’s – Engineer Bill Smith Noticed that products with high “first pass yields” performed better in the field Six Sigma is Motorola trademark Measure defects per million instead of % defective
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New Perspective – 99% Defective 1 defect per hundred 10 defects per thousand 10,000 defects per million 10 million defects per billion!
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Concept of “Loss” USLLSL Nominal Good Bad Zero Loss LOSSLOSS
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Taguchi “Loss Function” Loss to society increases as products and processes deviate from “ideal” Loss for any process can be quantified and measured
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The 10X Rule It costs X to prevent a defect It costs 10X to find a fix a defect internally It costs 100X to fix the same problem in the field
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DMAIC Improvement Model Define - Define the project’s purpose and scope and obtain background information about the process and its customers Measure – Focus your improvement effort by gathering information about the current situation Analyze – Identify the Root Cause(s) and to confirm them with data
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DMAIC Improvement Model (cont) Improve – Develop, try out and implement solutions that will eliminate the root cause(s) Control – Maintain the gains you’ve made by standardizing the work methods
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Tools of 66
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Define Affinity Diagram Project management / communication plan CTQ tree KANO Model Process Mapping Understand the “Voice of the Customer”
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Measure Run Charts / Control Charts Data Collection – Check Sheets Pareto Charts Histograms – Standard Deviation Flow Charts Measurement System Analysis Operational Definitions Taguchi Loss Function
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Analyze Brainstorming Cause-and-Effect Diagram Design of Experiment – DOE Focused problem statement – what/when/where/how/who Hypothesis testing Scatter Diagram (Regression Analysis)
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Improve Failure Mode and Effects Analysis Control Charts Histograms – Standard Deviation Pareto Charts Plan-Do-Check-Act Cycle (PDCA)
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Control Communication Plan –Revised Work Instructions / SOPs –Training –Final Management Report / 6 Story Board Control Chart Periodic Audits
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Goal/QPC Memory Jogger II
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Lean Manufacturing A system for eliminating waste from any manufacturing or business process Waste is anything that does not add value to the product.
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Waste is “anything other than the minimum amount of equipment, materials, parts, space, and worker’s time, which are absolutely essential to add value to the product.” Shoichiro Toyoda President, Toyota © 1995 Corel Corp. Waste (Muda)
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Value Stream Mapping TPM Standardized work 5S UCL Kaizen Process Suggestion system Demand-pull Plant Layout Problem Solving Error Proofing Effective Meetings Quick Change over Cellular/Flow Manufacturing Lean Accounting Kanban 6 Sigma Zero defects Breakthrough Thinking Issue Management Metrics Change Management Visual Management Project Management ENTERPRISE The Lean Umbrella – HVS Tool Kit
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Conventional Layout RECEIVE PARTS STORAGE RAW Material STORAGE SHIP STORAGE TEST OFFICE LATHES DRILL PRESS Molding MILLS ASSEMBLY Batch Production
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Cellular Production Finished Parts Raw material LatheDrillMill Press Ream AssemblyTest Office
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Current State Map
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Post Install IIIIII C/T = 6 second C/O = 30 sec Uptime = 85% 27,000 sec. avail. EPE = 2 minutes C/T = 7 seconds C/O = 10 sec Uptime = 100% 1 Shift 27,000 sec. avail. 1 min General Illumination Red Tray Green Tray Yellow Tray Tray = 6 pieces 1 Shift 1x Daily Parts Supplier Boards,Posts, Production Control Forecast Sequence Sheet 2 min 6 sec 1 min 6 sec 1 min 7 sec 1 min 7 sec Production Lead Time Value- Added Time = 11:40 min = 33 sec. Daily Ship Schedule Diode Install Resister Install Switch Install LED Install Final Inspection I Shipping Production Schedule C/T = 6 seconds C/O = 10 sec Uptime = 100% 1 Shift 27,000 sec. avail. C/T = 7 seconds C/O = sec Uptime = 100% 1 Shift 27,000 sec. avail. C/T = 7 seconds C/O = 10 sec Uptime = 100% 1 Shift 27,000 sec. avail. C/T = 7 seconds C/O = 1 minute Uptime = 100% 1 Shift 27,000 sec. avail. 1 min 2 min 7 sec OVER PRODUCTION Over Processing Movement Inventory DEFECTSDEFECTS Information Transport Waste: an activity that consumes resources but creates no value Waiting
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Future State Map
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“At Toyota, we get brilliant results from average people managing a brilliant process. Others get average results from brilliant people managing broken processes”.
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