A new mixed-integer programming (MIP) formulation is presented for the production planning of single-stage multi-product processes. The problem is formulated as a multi-item capacitated lot-sizing problem in which (a) multiple items can be produced in each planning period, (b) sequence-independent set-ups can carry over from previous periods, (c) set-ups can cross over planning period boundarie...

In this paper we study the drivers and consequences of understaffing in retail stores by examining the longitudinal data on traffic flow, sales and store managers’ labor planning decisions of 41 stores in a large retail chain. Assuming store managers are profit-maximizing agents, we use a structural estimation technique to estimate the contribution of labor to sales and impute the cost of labor...

Although syndromic surveillance systems using nonclinical data have been implemented in the United States, the approach has yet to be tested in France. We present the results of the first model based on drug sales that detects the onset of influenza season and forecasts its trend. Using weekly lagged sales of a selected set of medications, we forecast influenzalike illness (ILI) incidence at th...

The main pupose of this research is to survey of effective factors on Strategic human resource planning Implementation in National Iranian Oil Products Distribution Company (N.I.O.P.D.C). In order to this survey, lee  & Gough & Moses & Sinelane theories and for survey of effective factors on HR, Stainer and Christopher theories have been used with ten phrases as theorical framework.Statistical ...

this paper develops a model for distribution network expansion planning (dnep) considering reliability issues. with simultaneous switch placement and dnep, the proposed model tries to adequately consider the reliability issues in the planning stage in a way that the designed network has suitable performance from the reliability viewpoint. the reinforcement or installation of mv feeders and hv/m...

The European seed business of Syngenta relies on its supply chain to supply seed products to the different European markets, which led to more than 1.2 billion USD revenues in 2013. The seed supply chain is, however, exposed to a high level of uncertainty – from the demand side as well as from the supply side. Determining optimal production volumes in a highly volatile environment and more than...

Introduction: The functionality and quality of any treatment planning system (TPS) strongly depends on the type of Algorithm which is used by it. Obviously, the role of dose distribution algorithms in calculation of prescribed dose inside the tumor in modern radiotherapy techniques has more important than past to achieve the best clinical outcomes, especially in tumors which ar...

the submitted articles to iranian congress of physiology and pharmacology could be analyzed for the distribution of research in different fields. based on field distribution of articles in 20th congress, it seems that a strategic planning for research development in the field of physiology and pharmacology is essential. it is also suggested to revise the congress scientific structure, and to us...