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Managing Quality 12 July 2001
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Introduction What: quality in operations management Where: Quality affects all goods and services Why: Customers demand quality
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What is Quality High quality products Low quality products What does quality mean to you?
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American Society for Quality “The totality of features and characteristics of a product or service that bears on its ability to satisfy stated or implied needs”
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User-Based Definition “Quality lies in the eye of the beholder” Higher quality = better performance Higher quality = nicer features
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Manufacturing-Based Definition Quality = conforming to standards “Making it right the first time”
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Product-Based Definition Quality = a measurable variable
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Our Definition Quality: The ability of a product or service to meet customer needs
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Implications of Quality Company Reputation Product Liability Global Implications
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National Quality Awards: US: Malcolm Baldridge National Quality Award Japan: Deming Prize Canada: National Quality Institute Canada Awards for Excellence
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Canada Award Winners 2000 Aeronautical and Technical Services British Columbia Transplant Society Delta Hotels Honeywell Water Controls Business Unit
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Quality and Strategy Differentiation Cost Leader Response
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Quality and Profitability Improved QualityIncreased Profits Sales Gains Improved Response Higher Prices Improved Reputation Reduced Costs Increased Productivity Lower Rework, Scrap Lower Warranty Costs
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Costs of Quality Prevention Costs Appraisal Costs Internal Failure External Costs
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International Standards ISO 9000 Establish quality management procedures Documented processes Work Instructions Record Keeping Does NOT tell you how to make a product!
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Total Quality Management TQM – Total Quality Management Quality emphasis throughout an organization From suppliers through to customers
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W. Edwards Deming
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Deming’s 14 Points Create consistency of purpose Lead to promote change Build quality into the product, stop depending on inspections to catch problems Build long-term relationships based on performance instead of awarding business on the basis of price Continuously improve product, quality and service Start training
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Deming’s 14 Points Emphasize leadership Drive out fear Break down barriers between departments Stop haranguing workers Support, help and improve Remove barriers to pride in work Institute a vigorous program of education and self-improvement Put everybody in the company to work on transformation
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TQM Concepts Continuous Improvement Employee Empowerment Benchmarking Just-In-Time Taguchi Knowledge of Tools
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Continuous Improvement Plan Do Check Act
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Continuous Improvement Kaizen Zero Defects Six Sigma
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Employee Empowerment Involve employees in every step of production High involvement by those who understand the shortcomings of the system Quality circle
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Benchmarking Pick a standard or target to work towards Compare your performance Best practices in the industry
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Just-In-Time Produce or deliver goods just when they are needed Low inventory on hand Keeps evidence of errors fresh
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Taguchi Concepts Quality robustness Quality Loss Function Target-oriented Quality
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TQM Tools Check Sheet Scatter Diagram Cause and effect diagram (fishbone) Pareto Chart – 80-20 Rule Flow Charts Histogram Statistical Process Control
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Inspection Attribute Inspection Variable Inspection
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Inspection At supplier’s plant Upon receipt of goods from supplier Before costly processes During production When production complete Before delivery At point of customer contact
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Source Inspection Employees self-check their work Poka-yoke
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Statistical Process Control Apply statistical techniques to ensure processes meet standards Natural variations Assignable variations Goal: signal when assignable causes of a variation are present
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Statistics Mean Standard deviation Natural variation Assignable variation
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Control Charts X Bar Chart R Chart
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In Control vs Out Of Control In control and producing within control limits In control, but not producing within control limits Out of control
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Central Limit Theorem Mean Standard Deviation 95.5% 99.73% Control Limits
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Using Control Charts Mean changing – Range changing
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