Gene E. Tyworth

Color portrait of Gene E. Tyworth

Professor, John J. Coyle Endowed Professor of Supply Chain Management

Department Supply Chain & Information Systems
Office Address 413 Business Building
Phone Number 814-865-1866
Email Address jet@psu.edu

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Since joining the Smeal College, Dr. Tyworth has taught graduate and undergraduate courses in supply chain and logistics management. His work experience includes traffic management and air cargo operations. He was an active duty officer in the Air Force from 1967-71, when he performed transportation/logistics duties under the Strategic Air Command and the 14th Air Force (RVN). In addition, he continued his service from 1976-1994 as reserve officer in the acquisition/procurement area for HQ Air Force and later for DLA. He also has consulting experience with major companies in the railroad, trucking, air cargo, food products, forest products, wire and cable, offshore rig/platform supply, and information technology industries.

Expertise

Dr. Tyworth's research interests lie in the areas of total landed cost engineering, transport mode choice, and product availability levers

Education

Ph D, Logistics, University of Oregon, 1975

MBA, Logistics, University of Oregon, 1973

BA, Economics, University of California, Santa Barbara, 1966

Courses Taught

SCM 597F – Demand Planning (2)
Special Topics (1-9) Formal courses given on a topical or special interestsubject which may be offered infrequently; several different topics may betaught in one year or semester.

SCM 810 – Transportation and Distribution (4)
Role of transportation and distribution operations in matching supply withdemand; principles of transport industry analysis and competitivepositioning.

SCM 421 – Supply Chain Analytics (3)
Problem solving and modeling methods for analyzing supply chains management.

SCM 496 – Independent Studies (variable)
Creative projects, including research and design, that are supervised on an individual basis and that fall outside the scope of formal courses.

B A 302 – Supply Chains (2)
Introduction to key elements and strategic importance of supply chain networks.

SC&IS 421 – Supply Chain Modeling and Analysis (3)
Problem solving and modeling methods for analyzing supply chains management.

SC&IS 496 – Independent Studies (variable)
Creative projects, including research and design, that are supervised on an individual basis and that fall outside the scope of formal courses.

B LOG 496 – Independent Studies (variable)
Creative projects, including research and design, which are supervised on an individual basis and which fall outside the scope of formal courses.

SC&IS 596 – Individual Studies (variable)
Creative projects, including nonthesis research, that are supervised on an individual basis and which fall outside the scope of formal courses. A specific title may be used in each instance and will be entered on the student's transcript.

SCM 546 – Strategic Procurement (2)
Development of procurement and supply management strategies to support synchronized supply chains.

SCM 596 – Individual Studies (variable)
Creative projects, including nonthesis research, that are supervised on an individual basis and which fall outside the scope of formal courses.

B LOG 421 – Logistics Analysis (3)
Design, develop, and use computer decision models for analysis of logistics problems; computer intensive coursework emphasizing spreadsheet applications.

B LOG 596 – Individual Studies (variable)
Creative projects, including nonthesis research, which are supervised on an individual basis and which fall outside the scope of formal courses.

B LOG 538 – Trnspn & Ph Dist (3)
Control of the movement of goods; coordination of supply and demand in creation and maximization of time and place utility.

Selected Publications

Tyworth J. E., Saldahna J., "The Lead-Time Reliability Paradox and Inconsistent Value-of-Reliability Estimates." Transportation Research Part E, vol. 70, 2014, pp. 76-85
Hayya J. C., Ramasesh R. V., Tyworth J. E., Kim J. G., Sun D., "JIT Delivery with Stochastic Lead Time." Journal of Operations Research Society, vol. 1, no. 2012, 2013, www.palgrave-journals.com/jors/
Historically, and MS&IS A-; not ranked in SC&IS
Saldahna J., Tyworth J. E., Swan P., Russell D., "Cutting Logistics Costs with Ocean Carrier Selection." Journal of Business Logistics, vol. 30, no. 2, 2009
Tyworth J. E., Saldahna J., Swan P., Russell D., "Door-to-Door Logistics Cost in Global Supply Chains." Proceedings of Fifth International Conference on Supply Chain and Information Systems, 2007
Thomas D. J., Tyworth J. E., "Is Pooling Lead-Time Risk by Splitting Orders Simultaneously Worthwhile?." Journal of Business Logistics, vol. 28, no. 1, 2007
Saldahna J., Russell D. M., Tyworth J. E., "A Disaggregate Analysis of Ocean Carriers Transit Time Performance." Transportation Journal, vol. 45, no. 2, 2006
Thomas D. J., Tyworth J. E., "Pooling Lead-Time Risk by Order Splitting: A Critical Review." Transportation Research, Part E, vol. 42, no. 4, 2006
Freimer M., Thomas D. J., Tyworth J. E., "The Value of Setup Cost Reduction and Process Improvement for Economic Production Quantity Model with Defects." European Journal of Operations Research, vol. 173, 2006
Suzuki Y., Tyworth J. E., Novack R. A., "Airline Market Share and Customer Service Quality: A Reference Dependent Model." Transportation Research A, vol. 35, 2001
Swan P., Tyworth J. E., "Shipper Sensitivity to Unreliable Service in Carload Markets." Transportation Journal, vol. 40, no. 1, 2001
Tyworth J. E., Ganeshan R., "A Note on the Solution to the Inventory Model for Gamma Lead-Time Demand." International Journal of Physical Distribution and Logistics Management, vol. 30, no. 6, 2000
Tyworth J. E., Ruiz-Torres A., "Transportation’s Role in Sole Versus Dual Sourcing Decision." International Journal of Physical Distribution and Logistics Management, vol. 30, no. 2, 2000
Ganeshan R., Tyworth J. E., Guo Y., "Dual-Sourced Supply Chains: The Discount Supplier Option." Transportation Research E, vol. 35, no. 1, 1999
Suzuki Y., Tyworth J. E., "A Theoretical Framework for Modeling Sales-Service Relationships in the Transportation Industry." Transportation Research E, vol. 34, no. 2, 1998
Tyworth J. E., Zeng A. Z., "Estimating the Effects of Carrier Transit-Time Performance on Logistics Cost and Service." Transportation Research A, vol. 32, no. 2, 1998
Tyworth J. E., O'Neil L., "Robustness of the Normal Approximation of Lead-Time Demand in a Distribution Setting." Naval Logistics Research, vol. 44, 1997
Tyworth J. E., Guo Y., Ganeshan R., "Inventory Control Under Gamma Demand and Random Lead Time." Journal of Business Logistics, vol. 17, no. 1, 1996
Rao K., Grenoble W. L., Tyworth J. E., "Railroad Network Models: A Case Study of the Adoption Process." Journal of the Transportation Research Forum, vol. 34, no. 1, 1994
Tyworth J. E., "Modeling Transportation-Inventory Trade-Offs in a Stochastic Setting." Journal of Business Logistics, vol. 17, no. 2, 1992
Tyworth J. E., Rao K., Stenger A. J., "A Logistics Cost Model for Purchasing Transportation to Replenish High Demand Items." Journal of the Transportation Research Forum, vol. 32, no. 1, 1991
Tyworth J. E., Grenoble W. L., "Spreadsheet Modeling in Logistics: Advancing Today's Educational Tools." Journal of Business Logistics, vol. 12, no. 1, 1991
Tyworth J. E., Lemmon P., Ferrin B., "Improving LTL Delivery Service Quality with Statistical Process Control." Transportation Journal, vol. 25, no. 1, 1989
Chu Te G., Tyworth J. E., "Forecasting Cash Flows for Contracted Highway Projects: A Case Study." Journal of the Transportation Research Forum, vol. 27, no. 1, 1986
Koot R., Tyworth J. E., Track Quality Measurement by Multivariate Statistical Analysis, vol. 25, no. 1, 1985
Horn K., Tyworth J. E., "The Impact of Railroad Boxcar Deregulation: A Case Study of Transcontinental Lumber." Journal of the Transportation Research Forum, vol. 25, no. 1, 1983
Koot R., Tyworth J. E., "The Determination of Track Maintenance Spending." Transportation Journal, vol. 21, no. 1, 1981
Tyworth J. E., Koot R., "The Impact of General Rail Rate Increases on the Penetration of Midwestern Lumber Markets." Transportation Research E: Logistics and Transportation Review, vol. 17, no. 3, 1981
Tyworth J. E., Spychalski J. C., Reinschmidt A., "The Role of FRA Track Safety Standards in the Decision Framework for Maintenance-of-Way Spending." ICC Practitioners Journal, vol. 48, no. 4, 1981
Tyworth J. E., Reinschmidt A., "The Role of Safety and Train Speed in Track Maintenance Spending Decisions: A Case Analysis." Traffic Quarterly, vol. 35, no. 1, 1981
Tyworth J. E., ""On the Transportation Use Controversy: An Analysis of Car Service and Boxcar Utilization in the Movement of Food Products." Transportation Journal, vol. 19, no. 4, 1980
Tyworth J. E., "The Effects of Incentive Per Diem on the Utilization of Plain Boxcars." Journal of the Transportation Research Forum, vol. 21, no. 1, 1980
Tyworth J. E., "Pricing Private Freight Car Service: An Analysis of Transporta¬tion Use and the Problem of Standby Car Capacity." ICC Practitioners Journal, vol. 46, no. 6, 1979
Tyworth J. E., "The Analysis of Shipper Operating Policies and Private Freight Car Utilization." Transportation Journal, vol. 17, no. 1, 1977

Research Impact and Media Mentions

"Research Impact", Google Scholar, Web
"Research Impact", ResearchGate, Web
"Award", WDSI, Professional Society

Editorships

Journal of Business Logistics, Associate Editor, January 2011 - Present
Supply Chain Forum, Editorial Board, August 2000 - Present
Editorial Advisory Board
Transportation Journal, Editorial Board, January 1990 - Present
to present