Facility location problems reported in the literature generally assume the problem parameter values (like cost, budget, etc.) to be known with complete certainty, even if they change over time (as in multi-period versions). However, in reality, there may be some uncertainty about the exact...

We study the problem of allocating doctors to primary health centers. We model the prob- lem as a multi-period uncapacitated facility location problem under uncertainty. The problem is unconventional in that the uncertainty is in the number and period of availability of doctors. We use a minmax...

This paper supersedes the work presented in WP.No.2014-02-06. We study the problem of allocating doctors to primary health centers (PHC). We model the problem as a multi-period uncapacitated facility location problem under uncertainty. The problem is unconventional in that the uncertainty is in...

We consider a service system that serves one class of customers, which is willing to pay a premium for a faster delivery, with priority over the other class, which is more price sensitive but is willing to wait longer. The demand from one class depends not only on the price and delivery time...

We study the problem of locating Emergency Medical Service (EMS) facilities in the presence of service level constraints for patients with acuity levels ranging from resuscitation to non-urgent. Each patient arriving at any EMS facility is triaged as either resuscitation/high priority or less...

We study the problem of locating Emergency Medical Service (EMS) facilities in the presence of service level constraints for patients with acuity levels ranging from resuscitation to non-urgent. Each patient arriving at any EMS facility is triaged as either resuscitation/high priority or less...

The Combinatorial bandwidth packing problem (CBPP), arising in a telecommunication network with limited bandwidth, is defined as: given a set of request, each with its potential revenue and consisting of calls with their bandwidth requirements, deciding (i) a subset of the requests to...

We study a firm selling two products/services, which are differentiated solely in their prices and delivery times, to two different customer segments in a capacitated environment. From a demand perspective, when both products are available to all customers, they act as substitutes, affecting...

Hub-and-spoke systems have wide applications ranging in airline transportation, freight transportation, urban traffic, postal delivery, telecommunications and distribution in supply chains. These systems are usually characterized by stochastic demand and congestion, which adversely affect the...