Browsing by Author "Demirok, Seda"

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    Sezgisel değerlendirme ve bulanık çok kriterli karar verme yaklaşımı ile bir acil servisin evrensel tasarım prensipleri açısından analizi
    (Başkent Üniversitesi Fen Bilimleri Enstitüsü, 2017) Demirok, Seda; Can, Gülin Feryal
    Sağlık hizmetlerinin organizasyonunda acil sağlık hizmetlerinin etkin bir şekilde gerçekleştirilmesi önemli bir yer tutmaktadır. Bu hizmetlerin etkinliği, tasarım açısından acil servislerden birçok insanın rahat bir şekilde yararlanmasına büyük oranda bağlıdır. Buna göre, acil servislerde evrensel tasarım ilkelerinin uygulanması ile bu yapıların toplumun büyük bir kısmı tarafından rahat bir şekilde kullanılması sağlanabilecektir. Bu çalışmada, özel bir hastanenin acil servisinin kullanılabilirliği evrensel tasarım prensipleri açısından değerlendirilmiştir. Bu kapsamda ilk aşamada, kullanılabilirlik analizi için Sezgisel Değerlendirme yaklaşımı kullanılarak acil servisteki evrensel tasarım prensiplerine ilişkin problemler tespit edilmiştir. İkinci aşamada, sezgisel değerlendirme sonucunda belirlenen problemler için Bulanık Delfi yöntemi uygulanarak kritik evrensel tasarım problemleri bulunmuştur. Üçüncü aşamada ise çok kriterli karar verme yapısına uygun bir şekilde, kritik problemlerin her biri birer alt kriter olarak tanımlanmış ve ana kriterleri temsil eden ilgili evrensel tasarım prensibi ile ilişkilendirilmiştir. Bu şekilde oluşturulan karar hiyerarşisine Bulanık DEMATEL yöntemi uygulanmış ve kriterler arasındaki ilişkiler dikkate alınarak öncelikle iyileştirilmesi gereken alt kriterler tanımlanmıştır. Elde edilen sonuçlara göre ilk üç sırada, asansör buton tasarımı, asansör acil durum zili, kat tabelasının konumu ile ilgili tespit edilen problemler öncelikle iyileştirilmesi gereken problemler olarak belirlenmiştir. Efficiency of emergency health services have an important place in the organization of health services. In terms of design, the efficiency of these services depends heavily on benefit from emergency services by people. Accordingly, with the implementation of universal design principles in emergency services, these structures will enable to be used comfortably by a large part of the population. In this study, the usability of a private hospital emergency service was evaluated in terms of universal design principles. Firstly, universal design problems in the emergency service was identified by using heuristic evaluation approach for usability analysis. Secondly, critical universal design problems were found by applying the Fuzzy Delphi method for the problems identified as the result of heuristic evaluation. In the third stage, in accordance with multi-criteria decision making structure, critical problems were defined as subcriteria and associated with the relevant universal design principle which represents the main criteria. Fuzzy DEMATEL method was applied to the decision hierarchy and the sub criteria that should be primarily improved have been defined by considering the relations between the criteria. According to the results, the problems identified in the first three ranks, the elevator button design, the elevator emergency button, the position of the floor signboard were determined as problems that should be primarily focused.
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    Universal usability evaluation by using an integrated fuzzy multi criteria decision making approach
    (2019) Can, Gulin Feryal; Demirok, Seda
    Purpose The purpose of this paper is to propose an integrated fuzzy approach to determine important universal usability problems (UUPs) by providing experts who behave like real users and to establish a work plan to correct the most important ones. Design/methodology/approach In this study, a fuzzy multi-criteria decision-making approach with three stages is proposed for the evaluation of universal usability. At the first stage, UUPs are identified by performing modified heuristic evaluation, and severity rating of each problem is determined by experts. At the second stage, critical problems are specified by applying the fuzzy Delphi considering these severity ratings. At the third stage, Fuzzy Decision Making Trial and Evaluation Laboratory approach is applied to prioritize critical problems as sub and main criteria. An illustrative example related to emergency service is performed to apply the proposed approach. Findings Results showed that the elevator button design, the elevator emergency button design and the position of the floor signboard are the first three problems that should be primarily improved as sub-criteria. In terms of main criteria, equitable use, simple and intuitive use, and perceptible information are the first three main criteria that should be improve in emergency service. Originality/value This study is original in terms of methodology and providing a new perspective for building design evaluation. The results can help the designers to see the UUPs in buildings, to focus the most important UUPs and to establish improvement ranking. These advantages provide time and cost-effective design improvement actions.