ד"ר רות סגרון

B.Sc.               2007-2010 - JCT, Industrial Engineering and management; Jerusalem, Israel, Cum Laude

M.Sc.              2011-2013 - Industrial Engineering and management; Ben Gurion University of the Negev, Beer-Sheva, Israel.

                        Advisors: Dean Grosbard, Gad Rabinowitz, Israel Tirkel

                        Thesis: Queueing Networks Model for Manufacturing Systems

Ph.D.               2013-2017 - Industrial Engineering and management; Ben Gurion University of the Negev, Beer-Sheva, Israel

                        Advisors: Gad Rabinowitz, Israel Tirkel

                        Dissertation: Tandem Queueing Model for Production Line with Downtimes

2017-               Lecturer at the Industrial engineering and management department at Jerusalem College of Technology

2018-2019      Visiting Lecturer at the Industrial Engineering and management at Ben-Gurion University of the Negev

2012-2016      Visiting Lecturer at the Industrial Engineering and management at Jerusalem College of Technology

2011-2017      Teaching and Research Assistant at the Industrial Engineering and management at Ben-Gurion University of the Negev

2008 - Academic Excellence, JCT, 2,500 NIS

2009 - Academic Excellence, JCT, 2,500 NIS

2010 - Academic Excellence, JCT, 2,500 NIS

2013 - Academic Excellence, Ben-Gurion University, 4,620 NIS

2014 - Academic Excellence, Ben-Gurion University, 3,465 NIS

2015 - Academic Excellence, Ben-Gurion University, 5,082 NIS

2015 - Research Grant for Ph.D. students in Sciences - NA'AMAT Scholarship Fund, 10,000 NIS

2016 - Academic Excellence, Ben-Gurion University, 2,772 NIS

• Summary of Past Research and Development Activities
• Exploring and analyzing manufacturing systems in context of semiconductor manufacturing
• Queueing networks analysis
• Improving decomposition and variability functions methods for multi-class queuing networks in order to derive better predictions for performance measures in manufacturing systems with downtimes
• Investigating of the inter-departure times distribution in a G/G/1 queue

1. Summary of Current Research and Development Activities

• Development an analytic approximation (based on variability functions) in predicting performance measures with an interference (e.g. downtimes) within the network.
• Development an explicit expression for Laplace-Stieltjes transform of inter-departure times in PH/G/C queues, and an approximation expression in G/G/C queues

1. Future Directions for Research and Development.

• Improving decomposition and variability functions methods for multi-class multi-server queuing networks
• Analyzing tandem queues with blocking
• Using development of tandem queues with blocking in decomposition queuing networks approximations
• Developing an explicit expression for performance in M/G/1à./M/1 queueing system

a. Peer-Reviewed Papers in Refereed Journals (published)
1. Sagron, R., Grosbard D., Rabinowitz G., Tirkel I., (2015) "Approximation of Single-class Queueing Networks with Downtime-Induced Traffic Variability", International Journal of Production Research, Vol. 53, No. 13, 3871–3887. IF: 2.623, Q1. Citations: 5.
2. Sagron, R., Rabinowitz G., Tirkel I., (2017) "The Regression Based Variability Function Approximation for Tandem Queues with Downtime Events ", Computers & Operations Research. 88, 161-174. IF: 2.962, Q1
3. Sagron, R., Kerner Y. Rabinowitz G., Tirkel I., (2019) "The Laplace–Stieltjes Transform of Inter-departure Times Distribution in a G/G/1 Queue", Computers and Industrial Engineering. IF: 3.195, Q1 (Accepted for publication)
b. Peer-Reviewed Papers in Refereed Journals (under review)
1. Sagron, R., Grosbard D., "Intrinsic Variance Approximation for Downtime Induced Traffic Variability in Single Server Queueing Networks ", (Submitted(

c. Peer-Reviewed Papers in Refereed Conference Proceedings
1. Shilman R., Grosbard D., Tirkel I., and Rabinowitz G., 2013, "Queueing Networks Model for Manufacturing Systems", 6th IE&M Research Conference, March 2013, Jerusalem, Israel.

1. Presentations at Meetings not Followed by Published Proceedings

1. Shilman R., Grosbard D., Tirkel I., and Rabinowitz G., 2013, " Queueing Networks Model for Manufacturing Systems with High Arrival Variability and Downtimes," in Proceedings of the IEEE CASE 2013, Madison, Wisconsin, USA.
2. Shilman R., Grosbard D., Tirkel I., and Rabinowitz G., 2013, "Queueing Networks Model for Manufacturing Systems with Downtimes", Operations Research Society in Israel (ORSIS) Annual Conference, Beer-Sheva, Israel.
3. Shilman R., Grosbard D., Tirkel I., and Rabinowitz G., 2014, "Queueing Networks Model for Manufacturing Systems with Various Policies of Downtimes", Operations Research Society in Israel (ORSIS) Annual Conference, Tel-Aviv, Israel.
4. Sagron R., Tirkel I., and Rabinowitz G., 2015, "The two-moment approximations for manufacturing performance with non-renewal processes", 19th IE&M Conference, March 2015, Tel-Aviv, Israel.
5. Sagron R., Tirkel I., and Rabinowitz G., 2015, "Hybrid Simulation-Regression Approximation for Tandem Queues with Downtime Events", Operations Research Society in Israel (ORSIS) Annual Conference, Haifa, Israel.
6. Sagron R., Kerner Y., Tirkel I., and Rabinowitz G., 2016, "On the Distribution of Inter-departure Times in G/G/1 Queue", Operations Research Society in Israel (ORSIS) Annual Conference, Jerusalem, Israel.
7. Sagron R., Grosbard D., 2018, "Intrinsic Variance Approximation for Downtime Induced Traffic Variability in Single Server Queueing Networks", Operations Research Society in Israel (ORSIS) Annual Conference, Beer-Sheva, Israel.
8. Sagron R., Kerner Y., Tirkel I., and Rabinowitz G., 2018, "The Laplace–Stieltjes Transform of Inter-departure Times Distribution in a G/G/1 Queue", European Conference on Queueing Theory (ECQT), Jerusalem, Israel.
   1. Seminar presentations at universities and institutions
9. Shilman R., Grosbard D., Tirkel I., and Rabinowitz G., 2012, "Queueing Networks Model for Manufacturing Systems", department of IE&M, Jerusalem College of Technology, Jerusalem, Israel.
10. Shilman R., Grosbard D., Tirkel I., and Rabinowitz G., 2013, "Queueing Networks Model for Manufacturing Systems", department of IE&M, Ben-Gurion University of Negev, Beer-Sheva, Israel.
11. Shilman R., Grosbard D., Tirkel I., and Rabinowitz G., 2014, "Queueing Networks Model for Manufacturing Systems with High Arrival Variability and Various Policies of Downtimes", Research Students Seminar in Operations Research in Memory of Professor Uriel Rothblum, Technion - Israel Institute of Technology,  Haifa, Israel.
12. Sagron R., Tirkel I., and Rabinowitz G., 2016, "Queueing Networks Model for Manufacturing Systems with Downtimes", department of IE&M, Ben-Gurion University of Negev, Beer-Sheva, Israel.
    1. Journal refereeing
13. European Journal of Operational Research
14. International Journal of Production Research