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ISE researchers and their collaborators from five other institutions will soon engage in research on new construction safety and health
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Dr. Christian Wernz and Andrew Henry won Third Place in the INFORMS Service Science Section Best Paper Award
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ISE Takes First Place in APM Outstanding Chapter Competition for 2008-09!
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2008-2009 Material Handling Student Design Competition won by ISE students
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Winchester's summer research program focuses on diversity, science of human computer interaction
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New staff member to support Harris Manufacturing Processes Laboratory
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Students make own biodiesel derived from waste vegetable oil to fuel vehicles
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Graduate Student, Brian Mayer, participates in two big Adventure Races
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Recent Alumn selected as the Army Chief of Weapons Branch, Human Factors Integration Division
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Joel Nachlas

Dr. Joel A. Nachlas

Associate Professor

215 Durham Hall
Phone: 540-231-5357
Fax: 540-231-3322
Email: nachlas@vt.edu

Biographical Information

Education

  • Ph. D., University of Pittsburgh, 1976
  • M. S., University of Pittsburgh, 1974
  • B.E.S., Johns Hopkins University, 1970

Major responsibilities

  • Teaching and research
  • Operations Research option coordinator
  • International Programs coordinator

Recent Accomplishments

  • Analysis of time dependent availability for a class of non-stationary repair problems.
  • Definition of bivariate reliability and maintenance probability models.

Recent Course responsibilities

  • Statistical Quality Control
  • Reliability Theory
  • Random Processes

Selected recent publications

  • Nachlas, J. A., Reliability Engineering: Probabilistic Models and Maintenance Methods, Boca Raton, Taylor & Francis, (ISBN: 0-8493-3598-1), April, 2005.
  • Murdock, W. P., and J. A. Nachlas, “Availability under Age Replacement with Distinct Service Time Distributions”, Proc. of the Annual Reliability and Maintainability Symposium, (January, 2007), pp. 333-338.
  • Cassady, C. R. and J. A. Nachlas, “Evaluating and Implementing 3-Level Control Charts”, Quality Engineering, Vol. 18, No. 3, (2006), pp.285-292.
  • Seward, L. E. and J. A. Nachlas, “Availability Analysis for Multitask Production Systems”, International Journal of Flexible Manufacturing Systems, Vol. 16, 2004, pp. 91-110.
  • Cassady, C. R. and J. A. Nachlas, “Evaluating and Implementing 3-Level Acceptance Sampling Plans”, Quality Engineering, Vol. 15, No. 3, (2003), pp. 361-370.
  • Degbotse, A. T. and J. A. Nachlas, “Use of Nested Renewals to Model Availability Under Opportunistic Maintenance Policies”,Proc. of the Annual Reliability and Maintainability Symposium, (January, 2003), pp. 344-350.
  • Yang, S. C. and J. A. Nachlas, “ Bivariate Reliability and Maintenance Planning Models”, IEEE Transactions on Reliability, Vol. 50, no. 1, (March, 2001), pp. 26-35.

Selected recent projects

  • Condition based maintenance planning for oil pipelines
  • Availability under a quasi-renewal repair process
  • Bivariate reliability and availability modeling

Industries serviced

  • Micro-electronics, aerospace, manufacturing, petroleum

Key Professional Service Activities

  • Faculty Senate
  • College of Engineering International Programs Committee
  • ISE Department, Graduate Policy Committee
  • Chair, Soc. of Reliability Engineers, Int'l Technical Paper Award Committee.
  • Management Committee, Annual Reliability and Maintainability Symposium
  • ASQ Standing Review Board
  • Editor, Proceedings of the Reliability and Maintainability Symposium

Other service

Head coach, Virginia Tech men's lacrosse team

Additional links