Information Flow Between Tools Early in the Engineering Design Process Kate E. Nordland Advisor: Dr. Edward Hensel M. S. Thesis Presentation July 23, 2007 09 -2030, Conference Room, Level 2. Department of Mechanical Engineering The Kate Gleason College of Engineering Rochester Institute of Technology
Agenda n Overview n Database n Statement of work n Scripts n Literature Review n Case Studies n Background n Conclusion n Intro to Design n Recommendations n Questions
Definition of Engineering Design “Engineering design is a systematic, intelligent process in which designers generate, evaluate, and specify concepts for devices, systems, or processes whose form and function achieve clients’ objectives or users’ needs while satisfying a specified set of constraints. ” C. L. Dym, A. M. Agogino, O. Eris, D. D. Frey, and L. J. Leifer. Engineering design thinking, teaching, and learning. Journal of Engineering Education, 94: 103– 119, 2005.
Design Process
Design Tools n Affinity Diagram n House of Quality n Brain Ball n Morphological Chart n Brainstorming n Objective Tree Method n C-Sketch Method n Pairwise Comparison n Function-Means Tree n Weighted Voting
FACETS n Needs Assessment n Engineering Models n Concept Development n DFx: Detailed Design n Feasibility Assessment n Production Planning n Engineering Analysis and Tooling Design n Pilot Production n Transition to Commercial Production n Product Stewardship n Tradeoff Assessment, n Preliminary Design Synthesis
Forest of Information
Project Flowchart
test Schema n My. SQL Database
Script Schema Connections Tables accessed Tables always written to branch number, project number branch, branchfamily branch number, project number leaf, leaffamily, branch leaf, leaffamily beta pairwise branch number, project number leaf, leaffamily, alpha leaf, branch morphchart/ comparison branch number, project number leaf, branch, beta proposed beta voting branch number, project number leaf, branch, beta, gamma Page name Passed in Passed out welcome nothing project search keyword existing project search term, project number use Tables sometimes written to
existing
use
use traffic controller
pairwise
morphchart
comparison
voting
Safe Beverage Container Case Study As displayed in the project website
Bike. E Case Study As displayed in the project website
Needs to Concepts Rendering
Cornerstone Design Case Study Cornerstone Design Chicago house user requirements
DPM Case Study n Power Drill Customer Needs
Conclusions ü Determined similar facets early in engineering design ü ü ü process. Identified common tools used in the early facets of the design process. Proposed a table structure to store information from identified tools. Implemented the table structure through a series of web-based scripts. Demonstrated several tools through case studies utilizing the web-based scripts. Evaluated the table structure and implementation. Recommended considerations for future work.
Additional Conclusions n Connections between engineering specifications and design functions are not covered in current literature. This area should be investigated further. n Implicit relationships were identified within the House of Quality that aren’t explicitly stated. This apparent inconsistency needs to be looked into.
Immediate Recommendations n Implement into EDGE environment. n Develop wiki-based user interface. n Improve functionality for generating concepts by n n selecting a single function, having that selected function stay “on” and only displaying that functions’ concepts. Add ability to assign multiple parents to a leaf in the sorting view of use Display confirmation before deleting a leaf. Differentiate between display of implicit relationships and explicit relationships in comparison. Determine appropriate method of storing strength of relationship data (beta. data vs. gamma. data).
Future Recommendations n Incorporate the ability to consolidate input from multiple tools n Update comparison so cells can be edited to write relationships to beta. n Develop a tool to allow a “chief engineer” style weighted importance n n n n ranking to be written to alpha. Display items in morphchart in rank order. Include links to concept generation or voting. Identify the customers for the project are and relate the importance of the customer need relative to the different end users. Offer ability to add images such as used in the c-sketch method. Create appropriate table(s) and user interface for metrics to add capability for quantifying data. Expand tools set to the additional 10 facets of EDGE. Make recommendations to the user based in information stored in the database. Evaluate the effectiveness of performing an analytical analysis on validity of pairwise comparison [25].
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