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BUAD306 Chapter 9 – Management of Quality Chapter 10 – Quality Control (not in text) READ THIS CHAPTER!
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Quality Defined By YOU Examples of high quality products and services? Examples of low quality products and services? What do you remember more?
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Quality Defined by Business The ability of a product or service to consistently meet or exceed customer expectations
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Dimensions of Quality Performance – basic operating characteristics Aesthetics – how a product looks, feels, etc. Special features – “extras” Conformance – to specifications Reliability – consistency of performance Durability – how long it lasts Perceived Quality – customer’s view of quality Serviceability - service after sale/repairs Safety – risk of harm/injury
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Quality Terms Ease of Use – how easy it is for the customer to use the product/service Service after Use – how well the company “steps up” Quality of Design – designing quality characteristics into a product or service Quality of Conformance – making sure the product is produced according to the design/intent of designers
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Quality Considerations For Service Industries Tangibles – appearances (staff, facility, etc.) Convenience – ease of availability/accessibility Reliability – perform consistently & accurately Responsiveness – how well company reacts to unusual circumstances Timeliness – speed of service delivery/waiting time Assurance – the knowledge level of the staff Courtesy – how well customer is treated
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Consequences of Poor Quality Loss of business Liability - due to damages or injury Productivity – defective products can slow down a production process Costs Diminished Reputation
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Costs of Quality Appraisal Costs – costs of measuring, testing and analyzing Prevention Costs – costs incurred during production design Failure Costs – difference between what it actually costs to produce/deliver & what it would cost if there were no failures Internal Failure Costs (before)– rework, downtime External Failure Costs (after)– complaints, returns
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Quality Responsibilities Who is responsible for quality in the organization? Why is it important to face quality issues sooner than later?
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Ensuring Continual Quality Design quality into the process Instill a quality mentality Continually seek new ideas and improvements How do you do this systematically???
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Total Quality Management A philosophy that involves everyone in an organization in a continual effort to improve quality and achieve customer satisfaction.
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Total Quality Management 1.Customer defined quality 2.Successful product design 3.Utilize processes that ensure quality 4.Continuous improvement - track results & improve on them 5.Encourage suppliers & distributors to embrace TQM 6.All employees responsible for quality – requires training 7.Utilize competitive benchmarking 8.Shared problem solving – team oriented 9.Top management leadership Read Text
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Six Sigma – as defined by GE “…if you can measure how many "defects" you have in a process, you can systematically figure out how to eliminate them and get as close to "zero defects" as possible. To achieve Six Sigma Quality, a process must produce no more than 3.4 defects per million opportunities. An "opportunity" is defined as a chance for nonconformance, or not meeting the required specifications. This means we need to be nearly flawless in executing our key processes. IMPT: Read Text
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Six Sigma Concepts - DMAIC Define – process improvement goals Measure – baseline data Analyze – to verify cause Improve – based on analysis Control – transition into production & monitor continuously IMPT: Read Text
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Example: Trabant Is Trabant an example of efficiency? Are there issues at Trabant? What solutions do you have?
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Problem Solving & Quality Variety of Techniques – all generally following the same “steps:” Define problem Develop measures/standards Analyze the situation Generate solutions Implement solution Monitor IMPT: Read Text
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Basic Quality Tools Check sheets Flowcharts Scatter diagrams Histograms Pareto analysis Control charts Cause-and-effect diagrams Run Chart IMPT: Read Text
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Generating New Ideas Brainstorming Interviewing Benchmarking 5W2H What, Why, Where, When, Who, How, How Much IMPT: Read Text
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Benchmarking Steps Analysis using quality tools Identify a critical process that needs improvement Identify an organization that excels in the process Study their benchmark activity Analyze data (compare/contrast) Improve process IMPT: Read Text
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Chapter 10 Quality Control
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Quality Scenarios Toner Cartridges Subway Subs Taco Bell Tacos
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Quality Control A process that measures output relative to a standard and acts when outputs don’t meet the standard
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Phases of Quality Assurance Acceptance sampling Process control Continuous improvement Inspection before/after production Corrective action during production Quality built into the process The least progressive The most progressive
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Inspection How Much/How Often Why?? Where/When Centralized vs. On-site InputsTransformationOutputs Acceptance sampling Process control Acceptance sampling
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Inspection Points Production Inputs Finished products Before a costly operation Before an irreversible process Before a covering process Services Restaurants – appearance, waiting time, food quality, accuracy Retail – inventory, pricing, appearance, waiting time
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Process Control A statistical procedure using control charts to see if any part of the production process is not functioning properly and could cause poor quality.
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Process Control Steps Define Measure Compare to standard Evaluate Take corrective action Evaluate corrective action
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Variations and Control Assignable Variation - A variation whose source can be identified Examples: fatigue, equipment adjustments, carelessness, interruptions Random Variation - Natural variations in the output of process Examples: Countless minor factors
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Data Evaluated Attribute Data (P & C Charts) Product characteristic evaluated with a discrete choice: Good/bad, yes/no Variable Data (Control Charts) Product characteristic that can be measured on a continuous scale: Length, size, weight, height, time, velocity
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Control Charts A time-ordered plot of sample statistics, used to distinguish between random and nonrandom variability Compared against control limits Upper control limits Lower control limits
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Process Control Charts 0123456789101112131415 UCL LCL Sample number Mean Out of control Normal variation due to chance Abnormal variation due to assignable sources
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Process is In Control When… No sample points are outside limits Most points near process average Equal number of points above & below centerline Points appear randomly distributed
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