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The focus now is on staffing algorithms to achieve stable performance in face of strongly time-varying arrival rates and relatively long service times.

• Server Staffing to Meet Time-Varying Demand. by Otis B. Jennings, Avishai Mandelbaum, William A. Massey and WW, Management Science, vol. 42, No. 10, 1996, pp. 1383-1394.

• Staffing of Time-Varying Queues to Achieve Time-Stable Performance. by Zohar Feldman, Avishai Mandelbaum, William A. Massey and WW, Management Science, vol. 54, No.2, February 2008, pp. 324-338.

• Stabilizing Customer Abandonment in Many-Server Queues with Time-Varying Arrivals. by Yunan Liu (Columbia PhD, now at North Carolina State University) and WW. Submitted to Operations Research.

• The Erlang-R Queue: Time-Varying QED Queues with ReEntrant Customers in Support of Healthcare Staffing�. by Avishai Mandelbaum and GY. Submitted to Manufacturing and Service Operations Management.