l15_tol_des3

l15_tol_des3 - Final Exam Very good performance overall...

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Final Exam • Very good performance overall • Essays were particularly good • Mean - 88.5% • Standard deviation - 5.7% 16.881 MIT
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Homework •H W#8 – Mean = 96.1 – Standard Deviation = 7.4 W#9 – Mean = 94.9 – Standard Deviation = 5.5 16.881 MIT
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The Remainder of the Course • Primary mission -- Complete your term projects • Secondary mission -- Cover topics of interest • 70% of your grades are set (term project = 30%) • Class sessions (half new topics / half consultation) – Tolerance Design / Projects – Mahalanobis Taguchi System / Projects – Conceptual Robust Design / Projects – Final Project Presentations 16.881 MIT
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Expectations on Final Project • Should represent ~30 hours of effort • Options – Full robust design effort – Planning phase only – Post mortem analysis of a previous effort – Study of an advanced topic in robust design – Other possibilities with permission 16.881 MIT
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Grading of the Final Project • 75% Written report • 25% Oral presentation • Grading criteria include – Impact and significance of the results – Quality of the planning and analysis – Clarity of technical exposition 16.881 MIT
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Tolerance Design The Interface Between Design and Manufacture 16.881 MIT
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Outline • History of tolerances • Tolerancing standards • Tolerance analysis • Tolerance design • Taguchi’s approach •C ase study 16.881 MIT
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History of Tolerances • pre 1800 -- Craft production systems 1800 -- Invention of machine tools & the English System of manufacture 1850 -- Interchangeability of components & the American system of manufacture Jaikumar, Ramachandran. From Filing and Fitting to Flexible Manufacture, 1988. 16.881 MIT
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Craft Production Drawings communicated rough proportion and function Drawings carried no specifications or dimensions Production involved the master, the model, and calipers 16.881 MIT
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The English System • Greater precision in machine tools • General purpose machines
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l15_tol_des3 - Final Exam Very good performance overall...

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