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# L12 - MAE 486 Design of Mechanical Systems Lecture 12 Fall...

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Unformatted text preview: MAE 486 Design of Mechanical Systems Lecture 12 Fall 2011 Today s topics: Decision Making (Chapter 7); Review: •  •  •  •  •  Decision Theory What are the basic elements (in terms of Design?) What are the diﬀerent types of D.M. models? Examples of Diﬀerent Decision Types [email protected]@on: How to determine the [email protected] fun.? Basic deﬁ[email protected]: –  Value, Performance, [email protected], Marginal [email protected] •  [email protected][email protected] •  Expected [email protected] Analysis –  –  –  –  –  –  Key: AOtude  D.M. process Goal: Challenge: How to determine U(x)? Risk vs. Gain? Example: Which to prefer? Two common types of U(x): Review: Decision Tree Example [email protected] Method •  What is [email protected]? •  Absolute comparison: What are the criterion? Pugh Concept [email protected] Method •  What is the idea? •  What are the steps? Measurement Scales •  Why is it needed? •  What are the diﬀerent scales? –  1. –  2. •  Q: How many total comparison for n number of criteria? Weighted Decision Matrix •  What is it? •  What is the key: •  How to determine the weights? What are the diﬀerent ways? HOT Example AHP: [email protected] Hierarchy Process •  [email protected]@on [email protected]: How do we know –  One criterion is more important than the other? By how much? –  One design choice is beYer than the other? By how much? •  What is it? •  [email protected] [email protected]: •  What is the goal: Use of AHP to Weight Design Criteria •  How to determine [email protected] factors? •  What are the steps? Use of AHP to Weight Design Criteria •  How to determine [email protected] factors? •  What are the steps? Use of AHP to Weight Design Criteria •  What are the steps? Use of AHP to Weight Design Criteria •  How to make sure we are consistent? Use of AHP to Weight Design Criteria: Consistency Check •  What are the steps? Use of AHP: Are we done? •  What is next when using AHP in design? •  How to apply AHP to design [email protected]? Use of AHP: Are we done? •  What is next when using AHP in design? •  How to apply AHP to design [email protected]? Use of AHP: Are we done? •  How to apply AHP to design [email protected]? Use of AHP: Are we done? •  How to apply AHP to design [email protected]? AHP in Design: Consistency Check Use of AHP in Design: Select the Best ...
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