LEC01 2011 Quality Mgt(1)

LEC01 2011 Quality Mgt(1) - Quality Engineering Acceptance...

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Quality Engineering Acceptance Sampling ($1) On-Line Process Control ($10) Off-Line Process Improvement ($100) Acceptance Sampling Sample n, accept if # defectives < k Sampling sometimes more effective than 100% inspection Reduces bad product sent to consumer but provides no process or product feedback or improvement or defect prevention
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On-line Statistical Process Control Sample periodically from process and determine if statistic is within control limits Stop production if outside limits Early detection of production problems Shewhart 1920s Maintains current process but does not lead to improvements Shewhart charts Off-Line Improvement designed experiments to determine best product and process parameters combinations of factors to find best beyond changing one variable at a time If it's not broke, improve it! 2
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Quality Myth: Not always true that better quality means higher Cost Total Failure Cost Quality Cost Defect Rate $ 0 defects-----------------> CAN BE WRONG!!!!!! 3
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Very Often: Higher Quality Lower Cost Plastics Recycling: Less Defects and Higher Productivity grind bottles into chips remove paper remove hdpe aluminum PET decreased number of aluminum chips in PET from 500 ppm to 50 ppm 4 Designed Experiment: Factors Angle of separator Level of charge Speed of drum Flow of input
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increased speed by 100% Quality Systems Make a Company More Competitive Quality renaissance in 1980’s - compete with Japan Tactical gains less inspection less scrap and rework less downtime easier scheduling less inventory shorter lead time less warranty cost less lateness Strategic gains more flexibility to make new products customer satisfaction easier to spot and solve problems employee involvement in continuous improvement 5
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Concurrent Engineering for New Product Design
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This note was uploaded on 09/13/2011 for the course INDUSTRIAL 580 taught by Professor Kissem during the Spring '09 term at Rutgers.

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LEC01 2011 Quality Mgt(1) - Quality Engineering Acceptance...

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