Context-free grammar constraints enforce that a sequence of variables forms a word in a language defined by a context-free grammar. The constraint has received a lot of attention in the last few years as it represents an effective and highly expressive modeling entity. Its application has been studied in the field of Constraint Programming, Mixed Integer Programming, and SAT to solve complex de...

BACKGROUND Shift work is closely related with workers' health. In particular, sleep is thought to be affected by shift work. In addition, shift work has been reported to be associated with the type or direction of shift rotation, number of consecutive night shifts, and number of off-duty days. We aimed to analyze the association between the night shift rotation interval and the quality of sleep...

In recent years, employees have been shouldering an increasing share of the costs of employee-provided health care. At the same time, more and more employers have been allowing employees to pay their out-of-pocket health care costs using pre-tax earnings, through tax-subsidized ‡exible spending accounts (FSAs). We use a cross-section of …rm-level data from 1993 to show empirically that these FS...

This is a review paper. Review is carried out in three parts. First part covered up the introduction to PSO algorithm, load balancing based on PSO and multi objective job shop scheduling by improved PSO. Second part of this paper focused on workflow scheduling in cloud based on various versions of PSO. Third part explained PSO with cloud model with a little result analysis. This survey is done ...

Resource-constrained project scheduling is an NPhard optimisation problem. There are many different heuristic strategies how to shift activities in time when resource requirements exceed their available amounts. These strategies are frequently based on priorities of activities. In this paper, we assume that a suitable heuristic has been chosen to decide which activities should be performed imme...

This chapter examines how e-CRM has affected both organizational and individual behavior in a leading Canadian bank. The innovative and customer-driven culture of this bank pushed it toward early adoption of e-CRM technology. The findings emphasize the role played by many strategic and organizational dimensions in the success of e-CRM implementation. In fact, to make e-CRM efforts pay off, new ...

Emergency medical response providers’ primary responsibility is to deploy an adequate number of ambulances in a manner that will yield the best service to a constituent population. In this paper we develop a two-stage integrated solution for complex ambulance deployment and crew shift scheduling. In the first stage we develop a dynamic expected coverage model to determine the minimum number of ...

We present a new implicit formulation for shift scheduling problems, using context-free grammars to model regulation in the composition of shifts. From the grammar, we generate an integer programming (IP) model allowing the same set of shifts as Dantzig’s set covering model. When solved by a state-of-theart IP solver on problems allowing a small number of shifts, our model, the set covering for...

Excessive waiting time in Emergency Departments (ED) can be both a cause of frustration and more importantly, a health concern for patients. Waiting time arises when the demand for work goes beyond the facility's service capacity. ED service capacity mainly depends on human resources and on beds available for patients. In this paper, we focus on human resources organization in an ED and seek to...