Ohad Perry, Ohad received his Ph.D. from the IEOR Department in Columbia in 2010. In 2010-2011 Ohad was a postdoctoral fellow with Bert Zwart at the C.W.I. in Amsterdam. In August 2011 Ohad joined the faculty of the Department of Industrial Engineering and Management Sciences at Northwestern University, where he has been ever since.

Here are our completed papers:

1. Responding to Unexpected Overloads in Large-Scale Service Systems. Management Science, vol. 55, No. 8, August 2009, pp. 1353-1367. [PDF].
2. A Fluid Approximation for Service Systems Responding to Unexpected Overloads. Operations Research, vol. 59, September-October 2011, pp. 1159-1170. Journal version: [PDF]. Longer version: [PDF].
3. An ODE for an Overloaded X Model Involving a Stochastic Averaging Principle. Stochastic Systems, vol. 1, No. 1, 2011, pp. 59-108. [PDF].
   • Longer version with additional appendix. [PDF].
4. A Fluid Limit for an Overloaded X Model Via a Stochastic Averaging Principle. Mathematics of Operations Research, vol. 38, No. 2, May 2013, pp. 294-349 (with Ohad Perry). [PDF].
5. Diffusion Approximation for an Overloaded X Model Via a Stochastic Averaging Principle. Queueing Systems, vol. 76, 2014, pp. 347-401. [PDF].
6. Achieving Rapid Recovery in an Overload Control for a Large-Scale Service System. INFORMS Journal on Computing, vol. 27, No. 3, Summer 2015, pp. 491-506, published online, August 6, 2015. Permalink: http://dx.doi.org/10.1287/ijoc.2015.0642 [PDF].
   • Online Supplement to "Achieving Rapid Recovery in an Overload Control for a Large-Scale Service System". (with Ohad Perry) [PDF].
7. Chattering and Congestion Collapse in an Overload Switching Control. Stochastic Systems, vol. 6, No. 1, 2016, pp. 132-210, DOI: 10.1214/15-SSY187 (with O. Perry). [PDF].