
Takai, S., and Kalapurackal, R. M., 2012, “Sensitivity Analysis of Relative Worth in Quality Function Deployment Matrices,” Concurrent Engineering: Research and Applications, 20 (3), pp. 195202.

Takai, S., Yang, T. G., and Cafeo, J. A., 2011, “A Bayesian Method for Predicting Future Customer Need Distributions,” Concurrent Engineering: Research and Applications, 19 (3), pp. 255264.

Takai, S., Jikar, V. K., and Ragsdell, K. M., 2011, “An Approach toward Integrating TopDown and BottomUp Product Concept and Design Selection,” ASME Journal of Mechanical Design, 133 (7), 071007 (10 pages).

Takai, S., 2011, “A PrePost Assessment of Creativity Methods in an Experimental Course,” International Journal of Engineering Education, 27 (2), pp. 380388.

Takai, S., 2010, “A Use of a Mathematical Model in Updating Concept Selection,” ASME Journal of Mechanical Design, 132 (10), 101009 (10 pages).

Takai, S., 2010, “A GameTheoretic Model of Collaboration in Engineering Design,” ASME Journal of Mechanical Design, 132 (5), 051005 (10 pages).

Takai, S., 2010, “A LifecycleCost Model for SetBased Concept Testing,” Concurrent Engineering: Research and Applications, 18 (2), pp. 121127.

Takai, S., and Ishii, K., 2010, “A Use of Subjective Clustering to Support Affinity Diagram Results in Customer Needs Analysis,” Concurrent Engineering: Research and Applications, 18 (2), pp. 101109.

Takai, S., and Ishii, K., 2010, “The Maximum Resource Allocation for Uncertainty Reduction in a DecisionAnalytic Concept Selection,” Concurrent Engineering: Research and Applications, 18 (1), pp. 1929.

Takai, S., 2009, “A CaseBased Reasoning Approach toward Developing a Belief about the Cost of Concept,” Research in Engineering Design, 20 (4), pp. 255264 (10 pages).

Takai, S., and Ishii, K., 2008, “A DecisionAnalytic System Concept Selection for a Public Project,” ASME Journal of Mechanical Design, 130 (11), 111101 (10 pages).

Takai, S., and Ishii, K., 2006, “Integrating Target Costing into PerceptionBased Concept Evaluation of Complex and LargeScale Systems Using Simultaneously Decomposed QFD,” ASME Journal of Mechanical Design, 128 (6), pp. 11861195.

Razu, S. S., and Takai, S., 2012, “An Approach to Study Impact of Public Policy, Exogenous Variables, and Vehicle Design on Greenhouse Gas Emission,” Proceedings of 2012 ASME International Design Engineering Technical Conferences, Chicago, IL. DETC201270414.

Takai, S., Midha, A., and Esterman, M., 2012, “An Approach toward Developing Metrics to Predict Final Product Performance in ProjectBased Design Class,” Proceedings of 2012 ASME International Design Engineering Technical Conferences, Chicago, IL. DETC201270415.

Takai, S., Razu, S. S., and Yang, G. T., 2011, “An Approach toward Making a Design Decision Based on Future Demand Prediction,” Proceedings of 2011 ASME International Design Engineering Technical Conferences, Washington, DC. DETC201147493.

Razu, S. S., and Takai, S., 2011, “Reliability and Accuracy of Bootstrap and Monte Carlo Methods for Demand Distribution Modeling,” Proceedings of 2011 ASME International Design Engineering Technical Conferences, Washington, DC. DETC201147496.

Takai, S., 2011, “Impacts of Team Characteristics and Design Activities on Design Outcomes,” Proceedings of 2011 ASME International Design Engineering Technical Conferences, Washington, DC. DETC201147498.

Banga, K., and Takai, S., 2011, “Effects of Design Parameters in Cost Estimation and Cost Uncertainty Modeling,” Proceedings of 2011 ASME International Design Engineering Technical Conferences, Washington, DC. DETC201147886.

Takai, S., Yang, G. T., and Cafeo, A., J., 2010, “A Bayesian Framework for Predicting Customer Need Distributions,” Proceedings of 2010 ASME International Design Engineering Technical Conferences, Montreal, Canada. DETC201028230.

Razu, S. S., and Takai, S., 2010, “An Approach toward Modeling Customer Preference Uncertainty by Applying Bootstrap to ChoiceBased Conjoint Analysis Data,” Proceedings of 2010 ASME International Design Engineering Technical Conferences, Montreal, Canada. DETC201028231.

Banga, K., and Takai, S., 2010, “A Comparison of Case Based Reasoning and Regression Analysis Approaches for Cost Uncertainty Modeling,” Proceedings of 2010 ASME International Design Engineering Technical Conferences, Montreal, Canada. DETC201028232.

Takai, S., Jikar, V. K., and Ragsdell, K. M., 2009, “A TopDown Concept Selection Integrating Analytical and Optimization Approaches,” Proceedings of 2009 ASME International Design Engineering Technical Conferences, San Diego, CA. DETC200986738.

Takai, S., Razu, S. S., and Banga, K., 2009, “A DecisionAnalytic Concept Selection for a Commercial System Using Objective Data to Model Uncertainty,” Proceedings of 2009 ASME International Design Engineering Technical Conferences, San Diego, CA. DETC200986771.

Takai, S., 2008, “An Analytical Model of Collaboration between Engineers Working on Team and on Individual Projects,” Proceedings of 2008 ASME International Mechanical Engineering Congress and Exposition, Boston, MA. IMECE200867561.

Takai, S., 2008, “A Research Roadmap toward a Holistic and Structured TopDown Concept Selection Methodology,” Proceedings of 2008 ASME International Mechanical Engineering Congress and Exposition, Seattle, Boston, MA. IMECE200867555.

Singiresu, M., Boggavarapu, K., and Takai, S., 2008, “Integrating Concept Selection in a Software Development Process,” Proceedings of 2008 ASME International Design Engineering Technical Conferences, New York, NY. DETC200849864.

Kalapurackal, R. M., and Takai, S., 2008, “Sensitivity Analysis of Relative Worth in Empirical and SimulationBased QFD Matrices,” Proceedings of 2008 ASME International Design Engineering Technical Conferences, New York, NY. DETC200849861.

Boggavarapu, K., Veluru, N. K., and Takai, S., 2007, “Effects of Individual and Team Competitive Rewards on Collaboration and Productivity of Team,” Proceedings of 2007 ASME International Mechanical Engineering Congress and Exposition, Seattle, WA. IMECE200742427.

Kalapurackal, R. M., and Takai, S., 2007, “Sensitivity of Relative Worth in QFD Matrices to Rating Scales and Worth Calculation Schemes: An Empirical Study,” Proceedings of 2007 ASME International Mechanical Engineering Congress and Exposition, Seattle, WA. IMECE200742423.

Lakshminarayana, R. E., and Takai, S., 2007, “Effects of NonGeometric Features and Incentive Schemes on Manual Assembly of System Variants: An Experimental Study,” Proceedings of 2007 ASME International Mechanical Engineering Congress and Exposition, Seattle, WA. IMECE200742419.

Lakshminarayana, R. E., Bhardwaj, N., and Takai, S., 2007, “SimulationBased and Experimental Studies of Subjective Clustering and Bootstrap Application to Subjective Clustering,” Proceedings of 2007 ASME International Design Engineering Technical Conferences, Las Vegas, NV. DETC200735080.

Takai, S., 2007, “An Approach toward Target Warranty Costing in the Conceptual Design Stage,” Proceedings of 2007 ASME International Design Engineering Technical Conferences, Las Vegas, NV. DETC200735074.

Takai, S., and Ishii, K., 2007, “Sensitivity Analysis in Perceptual Evaluation of System Module Concepts,” Proceedings of 2007 ASME International Design Engineering Technical Conferences, Las Vegas, NV. DETC200735073.

Takai, S., 2007, “An Approach toward Estimating Cost of a New System in the Conceptual Design Stage Using KnowledgeBase,” Proceedings of 2007 ASME International Design Engineering Technical Conferences, Las Vegas, NV. DETC200735072.

Takai, S., 2006, “Developing Beliefs about the Cost of System in a Conceptual Design Phase,” Proceedings of 2006 ASME International Mechanical Engineering Congress and Exposition, Chicago, IL. IMECE200615013.

Takai, S., 2006, “System Concept Selection by Minimizing Cost of Part Requirement Tolerances,” Proceedings of 2006 ASME International Mechanical Engineering Congress and Exposition, Chicago, IL. IMECE200615009.

Lakshminarayana, R. E., and Takai, S., 2006, “An Approach for Improving Design of System Variants,” Proceedings of 2006 ASME International Mechanical Engineering Congress and Exposition, Chicago, IL. IMECE200614989.

Veluru, N. K., and Takai, S., 2006, “Influence of Individual and Team Rewards on Collaboration and Productivity of Team,” Proceedings of 2006 ASME International Mechanical Engineering Congress and Exposition, Chicago, IL. IMECE200614979.

Bhardwaj, N., and Takai, S., 2006, “Investigating the Accuracy of Subjective Clustering and Bootstrap Application to Subjective Clustering Using an Empirical Population,” Proceedings of 2006 ASME International Mechanical Engineering Congress and Exposition, Chicago, IL. IMECE200614516.

Veluru, N. K., and Takai, S., 2006, “An Approach to Educating Team Work,” Proceedings of 2006 ASME International Design Engineering Technical Conferences, Philadelphia, PA. DETC200699644.

Takai, S., 2006, “The Role of Modularized QFD in an Interdisciplinary Approach for System Concept Selection,” Proceedings of 2006 ASME International Design Engineering Technical Conferences, Philadelphia, PA. DETC200699627.

Bhardwaj, N., and Takai, S., 2006, “A Comparative Study of Bootstrap Application to Subjective Clustering,” Proceedings of 2006 ASME International Design Engineering Technical Conferences, Philadelphia, PA. DETC200699623.

Ramesh, R. P., and Takai, S., 2006, “TopDown Benchmarking Approach for Estimating Cost of Concept,” Proceedings of 2006 ASME International Design Engineering Technical Conferences, Philadelphia, PA. DETC200699615.

Takai, S., 2006, “Updating Belief in Concept Selection of a Public Project Using a Mathematical Model,” Proceedings of 2006 ASME International Design Engineering Technical Conferences, Philadelphia, PA. DETC200699607.

Takai, S., 2006, “A LifecycleCost Model of Concept Testing,” Proceedings of 2006 ASME International Design Engineering Technical Conferences, Philadelphia, PA. DETC200699605.

Takai, S., and Ishii, K., 2005, “DecisionAnalytic Concept Selection and Value of Information in a Public Project,” Proceedings of 2005 ASME Design Engineering Technical Conferences, Long Beach, CA. DETC85433.

Takai, S., and Ishii, K., 2005, “Inference of Population Hierarchical Cluster of Customer Needs,” Proceedings of 2005 ASME Design Engineering Technical Conferences, Long Beach, CA. DETC85432.

Takai, S., and Ishii, K., 2004, “Sensitivity Analysis of the Rating Scales and Worth Calculation Schemes Used in QFD Matrices,” Proceedings of 2004 ASME International Mechanical Engineering Congress and RD&D Exposition, Anaheim, CA. IMECE200461500.

Takai, S., and Ishii, K., 2004, “Testing Subjective Bias in the Analysis of the Customer Needs,” Proceedings of 2004 ASME Design Engineering Technical Conferences, Salt Lake City, Utah. DETC200457777.

Takai, S., and Ishii, K., 2004, “Modifying Pugh's Design Concept Evaluation Methods,” Proceedings of 2004 ASME Design Engineering Technical Conferences, Salt Lake City, Utah. DETC200457512.

Takai, S., and Ishii, K., 2002, “Setting Target Product Requirements: Decision Analytic Approach,” Proceedings of 2002 ASME Design Engineering Technical Conferences, Montreal, Canada. DFM34186.

Takai, S., and Ishii, K., 2001, “CostSpecification Analysis: Design Concept Selection Based on Target Cost and Specifications,” Proceedings of 2001 ASME Design Engineering Technical Conferences, Pittsburgh, PA. DFM21193.
Japanese Patent: AH09239451 "Bending Device of Metal Tube and U Tube Cold Bending Method"