lecture_21_-_design_to_cost. - ME 350 Lecture 21 Design to...

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Unformatted text preview: ME 350 Lecture 21 Design to Cost (DTC) Why DTC? 70% product cost is committed at early stage stages of design, only 6% of development cost is spent on design itself Conventional Product Design Processes Concurrent Engineering Design to Cost Implementation Goals: Estimating cost directly from a part models geometric features In real-time during CAD modeling with little to no extra time and without expert manufacturing knowledge In an integrated environment with direct access to enterprise cost data (e.g. updated material cost, machine parameters, labor rates, overhead rates etc.) Design to Cost Model CAD system Material selection Knowledge Bases Manufacturing Assembly Data Bases User interface Cost Estimation Materials selection/ Cost Module Direct material cost ~50% total product cost Constraints Functionality Mat. Cost Manufacturing processes Knowledge Bases Formal description of the knowledge with symbolic encoding Function: making decisions based on rules developed Machining processes Injection molding processes Design for assembly Example: slot making Examples of Data Bases Cost Estimator Heuristic VS Fuzzy logic Assembly Cost Module Example Assembly time Cost Statement - Calculated Results (one process, one part) Direct Variable Costs: Material Cost $1.22 = Part Weight * Raw Material Cost Per Kg / Material Utilization...
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lecture_21_-_design_to_cost. - ME 350 Lecture 21 Design to...

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