## Krivtsov, Vasiliy PhD

#### Research Interests

- Probabilistic models for recurrent repairs in the framework of g-renewal and quazi-renewal processes.
- Bivariate (e.g., in time & mileage) survival regression models with fixed and time-dependent covariates.
- Regularization techniques for ill-posed reliability estimation problems.
- Reliability condition-based maintenance of vehicle fleets based on real-time (“big”) data from connected vehicle fleets.

#### Background

Vasiliy Krivtsov is a practitioner and a consultant in Reliability Engineering, Risk Analysis and Applied Statistics employed by Ford Motor Company as a Senior Staff Technical Specialist. He holds a PhD degree in Electrical Engineering from Kharkov Polytechnic Institute, Ukraine and a PhD in Reliability Engineering from the University of Maryland, USA. Krivtsov is the author and co–author of over 50 professional publications, including a book, dozens of journal papers, 9 patented inventions and 6 trade secret inventions on statistical algorithms of Ford. He sits on the editorial board of Elsveir's international journal on “Reliability Engineering & System Safety” and is a Vice Chair of the International Reliability Symposium (RAMS) Tutorials Committee.

Krivtsov’s Ford responsibilities include: reliability analysis of field data and early failure detection procedures; probabilistic risk assessment of potential product recalls; statistical forecasting of warranty cost; teaching corporate reliability seminars (incl. Ford of North America, Europe, Mexico, Brazil, Australia). He also serves as a technical liaison of Ford's Automotive Safety Office to the US National Highway Safety Administration (NHTSA) on reliability issues. Most recently, with the emergence of real-time (“big”) data from connected vehicle fleets, Krivtsov became involved in research activities on Reliability Condition Based Maintenance of vehicle fleets.

#### Honors and Awards

**ARS Best Lecture Award**, Applied Reliability Symposium, Indianapolis, June 2014.**Ford Corporate Trade Secret Award**, Ford Motor Company, August 2013. (5 more trade secret awards received in 2003, 2004, 2008, 2010, 2011.)**Alan O. Plait Best Paper Award**, International Reliability Symposium (RAMS), January 2012.**Honorary Professor Diploma**, Kharkov Institute of Electronic & Computer Technology, Ukraine, September 2006.**Ford Research Technical Achievement Award**, Ford Motor Company, November 2002.**US DOE Outstanding Achievement Award**, Nuclear Regulatory Commission (NRC), December 1996.**National "Young Scientist" Award**, Ukrainian Ministry of Education, October 1991.

#### Professional Memberships

**Member of the Editorial Board**, Reliability Engineering and System Safety (RESS), International Journal, 1999 – present.**Guest Editor**of the RESS Special Issue on "Recent advances in theory and applications of stochastic point process models in reliability engineering", Reliability Engineering & System Safety, 2007, Vol. 92.**Speaker**and/or**Session Chair**; International Symposium on Reliability, Availability, Maintainability (RAMS^{®}), 2000 – present.**Vice Chair of Tutorials Committee**; International Symposium on Reliability, Availability, Maintainability; 2014– present.**Senior Member, IEEE**; 2010 – present; IEEE Reliability Society, 1997 – present. Publications in IEEE Transactions on Reliability :: Vol 54 (2005), Vol. 61 (2012), Vol 62 (2013).

#### Selected Publications

**Books & Book Chapters**

- M.P. Kaminskiy and V.V. Krivtsov (2011), A Gini-Type Index for Aging/Rejuvenating Objects - in Mathematical and Statistical Models and Methods in Reliability, Springer, Birkhäuser Boston, ISBN: 978-0-8176-4970-8.
- M. Modarres, M. P. Kaminsky, V.V. Krivtsov (2009), Reliability Engineering and Risk Analysis, 2nd edition, Taylor & Francis, London, ISBN: 0-8493-9247-0.
- V.V. Krivtsov and V.I. Gurevich (2003), Reliability Optimization for the Series Configuration of Electronic Components - in Protection Devices and Systems for High-Voltage Applications, Marcel Dekker, New York, ISBN: 0-8247-4056-4.
- V.V. Krivtsov, D.E. Tananko and T.P. Davis (2002), Application of Proportional Hazard Model to Tire Design Analysis, in Statistical and Analytical Methods in Automotive Engineering, Professional Engineering Publishing, London, ISBN:1-86058-387-3.
- M. Modarres, M. P. Kaminsky, V.V. Krivtsov (1999), Reliability Engineering and Risk Analysis: Practical Guide, Marcel Dekker, New York, ISBN: 0-8247-2000-8.
- M.P. Kaminsky and V.V. Krivtsov (1998), A Monte Carlo Approach to Repairable System Reliability Analysis - in Probabilistic Safety Assessment and Management, Springer, Birkhäuser Boston, ISBN: 3-540-76262-0.
- V.V. Krivtsov (1991), Parameter Correction Methods of Magnetically Controlled High-Voltage Interface Devices (in Russian), Kharkov Polytechnic Institute, Kharkov, Ukraine, 236 p.

**Refereed Journals**

- V.V. Krivtsov and A.Yu. Yevkin (2013), Estimation of G-Renewal Process Parameters as an Ill-Posed Inverse Problem - Reliability Engineering & System Safety, Vol. 115, pp. 10-18.
- A.Yu. Yevkin and V.V. Krivtsov (2013), Comparative Analysis of Optimal Maintenance Policies under General Repair with Underlying Weibull Distribution - IEEE Transactions on Reliability, Vol. 62, Issue 1, pp. 82-91.
- A.Yu. Yevkin and V.V. Krivtsov (2012), Approximate Solution to G-Renewal Equation with Underlying Weibull Distribution - IEEE Transactions on Reliability, Vol. 61, Issue 1, pp. 68-73.
- V.V. Krivtsov (2011), Field Data Analysis & Statistical Warranty Forecasting - Alan O. Plait Best Paper Award, IEEE Catalog No CFP11RAM-CDR, ISBN: 978-1-4244-8855-1.
- M.P. Kaminsky and V.V. Krivtsov (2010), G1-Renewal Process as Repairable System Model, Reliability and Risk Analysis: Theory & Applications, #3, Vol.1, pp. 7-14. Also available in Cornell University Archive - Statistical methodology, arXiv:1006.3718v1 [stat.ME].
- V.V. Krivtsov, I.M. Kolmanovsky, and T.P. Davis (2008), A Constrained Quadratic Spline as a Model for Cumulative Hazard Function, Int. J. Reliability and Safety, Vol. 2, No. 3, pp.170-178.
- V.V. Krivtsov (2008), On the NHPP with Underlying Distributions of the Location–Scale Family, Reliability Edge, Vol. 9, #1, pp. 20-24.
- M.P. Kaminsky and V.V. Krivtsov (2008), An Integral Measure of Aging/Rejuvenation for Repairable and Non-repairable Systems, Reliability and Risk Analysis: Theory & Applications, Vol. 1, pp. 69-76. Also available in Cornell University Archive - Statistical methodology, arXiv:0711.3218v1 [stat.ME].
- V.V. Krivtsov (2007), Recent Advances in Theory & Applications of Stochastic Point Processes in Reliability Engineering, Editorial Review, Reliability Engineering & System Safety, Vol. 92, # 5, pp. 549-551.
- V.V. Krivtsov (2007), Practical Extensions to NHPP Application in Repairable System Reliability Analysis, Reliability Engineering & System Safety, Vol. 92, # 5, pp. 560-562.
- M.P. Kaminsky and V.V. Krivtsov (2006), Bayesian Probability Papers, Reliability: Theory & Applications, No 1(2), pp. 57-62.
- M.P. Kaminsky and V.V. Krivtsov (2006), G-Renewal Process in Warranty Data Analysis, Reliability: Theory & Applications, No 1(1), pp. 29-34 (also translated into Russian).
- M.P. Kaminsky and V.V.Krivtsov (2005), A Simple Procedure for Bayesian Estimation of Weibull Distribution, IEEE Transactions on Reliability, Vol. 54, pp. 612-616.
- M.I. Awad, M.A. Dejack, and V.V. Krivtsov (2004), Evaluation of Fatigue Life Regression Models - SAE Technical Paper Series, # 2004-01-0625.
- D.E. Tananko, V.V. Krivtsov and D.C. Rohweder (2003), Do We Really Need a Spec on Tire Static Balance? - SAE Technical Paper Series, # 2003-01-0151.
- V.V. Krivtsov, D.E. Tananko and T.P. Davis (2002), A Regression Approach to Tire Reliability Analysis, Reliability Engineering & System Safety, vol. 78, # 3, pp. 267-273.
- V.V. Krivtsov and J. W. Case (1999), Peculiarities of Censored Data Analysis in Automotive Industry Applications - SAE Technical Paper Series, # 1999-01-3220.
- M.P. Kaminsky and V.V. Krivtsov (1997), A Monte Carlo Approach to Warranty Repair Predictions - SAE Technical Paper Series, # 972582.
- V.I. Gurevich and V.V. Krivtsov (1992), New Relay Technology for the Power Network System Automation (originally in Russian) - Electrical Power Engineering, #4, pp. 44-46.
- V.V. Krivtsov and V.I. Gurevich (1991), New Design Principles of the Overcurrent Protection Based on Magnetically Excited Contacts (originally in Russian) - Power Engineering, 1991, #6, pp. 38-43.
- V.I. Gurevich and V.V. Krivtsov (1991), High Voltage Hercone-Semiconducting Commutation Devices for REA Electric Power Supply Systems (originally in Russian) -Telecommunications And Radio Engineering - U.S.A., Scripta Technica Inc., #4, pp. 46-48.
- V.I. Gurevich, V.V. Krivtsov, P.I. Savchenko (1990), Interface Relays (originally in Russian) - Soviet Electrical Engineering, Allerton Press, Inc., Vol. 61, #6, pp. 71-75.
- V.I. Gurevich, P.I. Savchenko, V.V. Krivtsov (1988), Reed Interface Parameter Correction (originally in Russian) - Electronic Engineering, #3(122), pp. 89-93.

**Conference Proceedings**

- V.V. Krivtsov and M. Frankstein (2014), Reliability Analysis of “Sibling” Components - in Proc. Annual Reliability and Maintainability Symposium, Colorado Springs, CO, January 2014.
- M.P. Kaminsky and V.V. Krivtsov (2011), Gini: from Economics to Reliability - in Proc. Applied Stochastic Models and Data Analysis, Rome, Italy, June 2011, pp. 100-102.
- M.P. Kaminsky and V.V. Krivtsov (2009), A Gini–Type Index for Aging/Rejuvenating Objects - in Proc. Mathematical Methods in Reliability, Moscow, Russia, June 2009, pp. 391-394.
- V.V. Krivtsov (2008), Statistical Warranty Forecasting - in Proc. Annual Reliability and Maintainability Symposium, Las Vegas, NV, January 2008.
- V.V. Krivtsov and M. Frankstein (2006), Automotive Component Reliability: Should it be measured in Time or Mileage? - in Proc. Annual Reliability and Maintainability Symposium, Newport Beach, CA, January 2006, pp.601-605.
- V.V. Krivtsov (2005), Application Extensions of Nonhomogeneous Poisson Process, Invited Speech - in Proc. International Symposium on Stochastic Models in Reliability, Beer Sheva, Israel, February 2005, pp. 217-220.
- M.P. Kaminsky and V.V. Krivtsov (2004), An Approach to Evaluating the Joint Prior Distribution of Weibull Parameters - in Proc. 4th International Conference on Mathematical Methods in Reliability, Santa Fe, New Mexico, June 2004.
- V.V. Krivtsov and M. Frankstein (2004), Nonparametric Estimation of Marginal Failure Distributions from Dually Censored Automotive Data - in Proc. Annual Reliability and Maintainability Symposium, Los Angeles, CA, January 2004, pp. 86-89.
- V.V. Krivtsov and M. Frankstein (2001), Statistical Estimation of Hazard Function from Censored Automotive Data - in Proc. Spring Research Conference on Statistics in Industry & Technology, Roanoke, VA , June 2001.
- M.P. Kaminsky and V.V. Krivtsov (2000), A Monte Carlo Approach to Estimation of G-Renewal Process in Warranty Data Analysis - in Proc. 2nd International Conference on Mathematical Methods in Reliability, Bordeaux, France, June 2000, pp. 583-586.
- V.V. Krivtsov and J.W. Wasiloff (2000), Classical Vs. Bayesian Reliability Growth in Theory and Practice - in Proc. ASQ 54th Quality Congress, Indianapolis, IN, May 2000, pp. 311-316.
- M.P. Kaminsky and V.V. Krivtsov (2000), G-Renewal Process as a Model for Statistical Warranty Claim Prediction - in Proc. Annual Reliability & Maintainability Symposium, Los Angeles, January 2000, pp. 276-280.
- V.V. Krivtsov (1999), Bayesian Reliability Analysis in Automotive Industry Applications - in Proc. 11th SAE Aerospace International Reliability, Supportability & Logistics Conference, Auburn Hills, MI, May 1999.
- M.P. Kaminsky and V.V. Krivtsov (1999), A Statistical Estimation of the Cost Impact from Introducing a Mileage Limit in Automobile Warranty Policy - Proc., Institute of Mathematical Statistics, Vol. 28, # 2, p. 73.
- V.V. Krivtsov (1998), A Monte Carlo Simulation of Stochastic Point Processes for Automotive Industry Applications - Proc., Institute of Mathematical Statistics, Vol. 27, # 2, p. 98.
- M.P. Kaminsky and V.V. Krivtsov (1997), A Validation of Accelerated Test life Data - in Proc. 9th SAE Aerospace International Reliability, Supportability & Logistics Conference and Workshop, Dallas, TX, June 1997.
- V.V. Krivtsov, et. al (1996) A Reactor Safety Assessment System: Summary of Methods and Experiences - in Proc. International Conference on Probabilistic Safety Assessment and Management ESRA, Crete, Greece, June 1996, pp. 30-36.
- V.V. Krivtsov and V.I. Gurevich (1991), Calculation of the Rational Parameters for the Electromagnet Forcing Excitation Circuit - in Proc. National Conf. of Young Scientists on Electrotechnical Equipment of HV Conversion and Solid-State Techniques (National Research Institute of EE, Moscow, USSR, Oct. 1991), pp. 27-30.
- V.I. Gurevich and V.V. Krivtsov (1991), HV Reed-Semiconductor Switching Devices and their Application - in Proc. 5th All Union Sc. & Tech. Conf. on Conversion Techniques Problems (Ukr. Academy of Sciences Inst. of Electrodynamics, Kiev, Ukraine, Sept. 1991), pp. 189-191.
- V.I. Gurevich and V.V. Krivtsov (1990), Hybrid HV Reed-Solid-State Commutation Devices - in Proc. National Conf. on Power Electronics Equipment (National Research Institute of Electrical Engineering, Moscow, USSR, Jan. 1990), p.13.
- V.V. Krivtsov, V.I. Gurevich, K.K. Namitokov (1990), Methods of the Reed-Interface Operating Time Reduction - INFORMELECTRO, #9.
- V.V. Krivtsov, V.I. Gurevich, P.I. Savchenko (1989), A Monte Carlo Simulation for the Statistical Estimation of the Reed-Interface Parameters - INFORMELECTRO, 1989, #2.
- V.V. Krivtsov, V.I. Gurevich, P.I. Savchenko (1988), The Application of the Monte Carlo Method to the Hercotrone Operating Parameter Estimation - in Proc. 20th Ukr. Conf. on the Problems of the Safe and Reliable Power Supply and Energy Savings (Sebastopol, USSR, June 1988), pp. 35-36.