162 research outputs found
Evaluation the suppliers using Analytic hierarchy process(AHP): An application in the textile firm
Tedarikçi seçimi, hem sayısal hem de sayısal olmayan kriterleri içeren karmaşık çok kriterli bir problemdir. Tedarikçileri seçmek için, birbirleriyle çatışan bu kriterler arasında değiş-tokuş yapmak gereklidir. Tedarikçi seçim problemini çözmek için literatürde farklı yaklaşımlar önerilmiştir. Özellikle Saaty‘nin geliştirdiği Analitik Hiyerarşi Süreci(AHS), problemin çözümünde sayısal ve sayısal olmayan tüm kriterleri göz önünde bulundurduğu için daha kullanışlı bir yaklaşımdır. Bu çalışmanın ana amacı, AHS‘yi kullanarak bir tekstil firmasının tedarikçi seçim problemini çözmektir. Önerilen model beş alternatif, yedi ana ve on üç alt kriter arasındaki ilişkilerin hiyerarşik bir yapıda temsilini içerir. Yirmi bir ikili karşılaştırma matrisinin elde edilmesinde odak grup yöntemi kullanılmıştır. Modelin çözüm sonuçları verilmiş ve duyarlılık analizleri yapılmıştır. Sonuç olarak, firma yönetimi için önemli çıkarsamalar ve öneriler sunulmuştur. Supplier selection is a complex multi-criteria problem which includes both qualitative and quantitative criteria. In order to select the suppliers, it is necessary to make a tradeoff between these criteria some of which may conflict. Different approaches are suggested to solve the supplier selection problem in the literature. Especially, Saaty‘s analytic hierarchy process (AHS) is more useful approach for the problem, because of its inherent capability to handle qualitative and quantitative criteria.The main purpose of this study is to solve the supplier selection problem of the textile firm by using AHS. The proposed model consists of a hierarchical network of connections among five alternatives, seven main and thirteen sub criteria. Twenty-one pairwise comparison matrices were obtained by using focus group methodology. The results are presented and the sensitivity analyses are performed. Finally, some suggestions and important clues for the management are presented
A comparative ID migraine screener study in ophthalmology, ENT and neurology out-patient clinics
Migraine is more likely to be misdiagnosed in patients with comorbid diseases. Not only primary care physicians, but also specialists might misdiagnose it due to the lack of diagnostic criteria awareness. The ID migraine test is a reliable screening instrument that may facilitate and accelerate migraine recognition. This study aimed to compare the prevalence and characteristics of migraine in a large sample of patients admitted to clinics of ophthalmology (OC), ear, nose and throat diseases (ENTC) and neurology (NC), as well as to validate the use of the ID migraine test in OC and ENTC settings. This was a multicentre (11 cites) study of out-patients admitting either to NC, ENTC or OC of the study sites during five consecutive working days within 1 week. From each of the clinics, 100 patients were planned to be recruited. All recruited patients were interviewed and those having a headache complaint received an ID migraine test and were examined for headache diagnosis by a neurologist, blinded to the ID migraine test result. A total of 2625 subjects were recruited. Only 1.3% of OC patients and 5.4% of ENTC patients have been admitted with a primary complaint of headache, whereas the percentage of NC patients suffering from headache was 37.6%. Whereas 138 patients (19.3%) in OC, 154 (17.3%) in ENTC and 347 (34%) in NC were found to be ID migraine test positive, 149 patients (20.8%) in OC, 142 (16%) in ENTC and 338 (33.1%) in NC were diagnosed with migraine. The sensitivity, specificity, and positive and negative predictive ratios of the ID migraine test were found to be similar in all clinics. An important fraction of the patients admitted to NC, as well as to OC and ENTC, for headache and/or other complaints were found out to have migraine by means of a simple screening test. This study validated the ID migraine test as a sensitive and specific tool in OC and ENTC, encouraging its use as a screening instrument.Pfizer-Türkiy
Akut iskemik inmede intravenöz trombolitik tedavi sonrası erken iyileşme ile ilişkili faktörler
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