Impact of product variety on inventory performance : an empirical analysis of pharmaceutical and medical device industries

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buir.advisorŞen, Alper
dc.contributor.authorAydınlı, Ali Yağmur
dc.date.accessioned2016-01-08T18:19:07Z
dc.date.available2016-01-08T18:19:07Z
dc.date.issued2012
dc.departmentDepartment of Industrial Engineeringen_US
dc.descriptionAnkara : The Department of Industrial Engineering and the Institute of Engineering and Science of Bilkent University, 2012.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2012.en_US
dc.descriptionIncludes bibliographical references leaves 116-121.en_US
dc.description.abstractIn this thesis, we construct empirical models to analyze the effect of various financial measures and product variety on inventory performance. We apply multiple regression models and simultaneous equations models using 2010 financial data for 128 U.S. firms in pharmaceutical and medical device industries. Using multiple regression models, we investigate the correlation of inventory turnover with product variety, gross margin, capital intensity and type of the firm. Product variety data are obtained from U.S. Food and Drug Administration. The best multiple regression model explains 38.50% of the total variation in inventory turnover and we observe that inventory turnover is negatively correlated with product variety. Since inventory turnover is the ratio of cost of goods sold (sales) to inventory level, a change in product variety might have an effect both on inventory level and cost of goods sold. In order to investigate the effects of product variety on cost of goods sold and inventory level separately, we employ simultaneous equation models. The best simultaneous equation model explains 96.22% of the variation in inventory level and shows that inventory level is positively associated with product variety.en_US
dc.description.degreeM.S.en_US
dc.description.statementofresponsibilityAydınlı, Ali Yağmuren_US
dc.format.extentxiii, 142 leavesen_US
dc.identifier.urihttp://hdl.handle.net/11693/15476
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectInventory turnoveren_US
dc.subjectInventory levelen_US
dc.subjectProduct varietyen_US
dc.subject.lccTS160 .A93 2012en_US
dc.subject.lcshInventory control--Mathematical models.en_US
dc.subject.lcshProduction planning.en_US
dc.subject.lcshProduct differentiation.en_US
dc.subject.lcshPharmaceutical industry--Materials management.en_US
dc.subject.lcshDrug Industry--organization & administration.en_US
dc.subject.lcshIndustrial procurement.en_US
dc.titleImpact of product variety on inventory performance : an empirical analysis of pharmaceutical and medical device industriesen_US
dc.typeThesisen_US

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Dept. of Industrial Engineering - Master's degree