FunctionalModelingAndThroughput6x

FunctionalModelingAndThroughput6x - Overview Functional...

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1/23/2007 Industrial Data and Systems Analysis 1 Functional Modeling and Throughput Concepts Peter L. Jackson Professor School of O.R. and I.E. 1/23/2007 Industrial Data and Systems Analysis 2 Overview Functional Modeling (IDEF0) Appendix: Case Study in Functional Modeling 1/23/2007 Industrial Data and Systems Analysis 3 System Modeling Need to analyze systems from general to specific Techniques range from block diagrams to computer simulation Distinguish between functional modeling and behavioral modeling Functional modeling: hierarchical view of functional relationships (inputs/outputs) Behavioral modeling: sequence and concurrency 1/23/2007 Industrial Data and Systems Analysis 4 Functional Diagramming IDEF0 (“eye-deaf-zero”) Useful for abstract view of functionality Does not express sequencing and concurrency well: not precise Useful in system design when behavior is still vague Event Graphs (later in course) Useful for detailed models of behavior Expresses sequencing and concurrency well 1/23/2007 Industrial Data and Systems Analysis 5 Integrated Definition for Function Modeling (IDEF0) Developed by Air Force in 1970’s Simple rules, wide applicability Main survivor of a family of models (IDEF0, IDEF1, and IDEF2) Defined by Federal Information Processing Standard Publication 183 http://www.idef.com/pdf/idef0.pdf Our use is more casual than standard O Sul ivan, 1994. A0 Manufacture Products (Harrington Model) A1 MANAGE MANUFACTURING A2 DEVELOP PRODUCTS A3 PRODUCE PRODUCTS A4 SUPPORT SERVICE OF PRODUCTS Directives Reports to Enterprise Management Dir. to Develop Dir. to Produce Dir. to Support Product Requirements Authorization to Manufacture Funds Product Definition Procurable Items Prototypes and Models Design Information Resources for Support Parts and Products Facilities, tooling, equipment, personnel Instructions Resources for Product Support Status Reports Plan Change Requests Design Change Requests New Product Concepts Tool Design Requests Requests for Resources and Product Support Manufacturing Capabilities
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1/23/2007 Industrial Data and Systems Analysis 7 IDEF0 Function Template 1/23/2007 Industrial Data and Systems Analysis 8 Components of Template Function box Function name A verb phrase expressing capability system must possess Unique identifier For traceability “A0” is default Inputs Material, energy or information Arrows with noun phrases (enter left) Outputs Material, energy, or phrases (exit right) 1/23/2007 Industrial Data and Systems Analysis 9 Components (cont’d) Controls / Constraints Informational input to function that influences activity Eg. targets or user decisions or regulations phrases (enter top) Resources / Mechanisms Entity used by function but not consumed or
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FunctionalModelingAndThroughput6x - Overview Functional...

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