background hospital emergency departments (eds) are as barometers of the health care system. crowded eds threaten delivery of timely care. prolonged ed wait times reduce the quality of care and increase adverse and sometimes irreversible events. objectives the purpose of this study was to determine the patients' waiting time at namazi and shahid faghihi hospitals in shiraz, iran. patients and m...

background: hospital emergencies have an essential role in health care systems. in the last decade, developed countries have paid great attention to overcrowding crisis in emergency departments. simulation analysis of complex models for which conditions will change over time is much more effective than analytical solutions and emergency department (ed) is one of the most complex models for anal...

objectives the objective of this study was to evaluate factors influencing waiting time in patients of heart surgery centers, and to make recommendations for health-care policy-makers for reducing waiting time and increasing the quality of services from this perspective. patients and methods this cross-sectional study was performed in 2013. after searching articles on pubmed, elsevier, google s...

This article presents a perishable (s; S) inventory system under continuous review at a service facility in which a waiting hall for customers is of nite size M. The arrival instants of customers to the service station constitutes a Poisson process. The life time of each items is assumed to be exponential. All arriving customers demand the rst "essential" service, whereas only some of them dema...

bus systems are unstable without considering any control. thus, we are able to consider some control strategies to alleviate this problem. a holding control strategy is one commonly used real-time control strategy that can improve service quality. this paper develops a mathematical model for a holding control strategy. the objective of this model is to minimize the total cost related to passeng...