FAHP Approach to rank educational websites on Usability T

Fahp approach to rank educational websites on

This preview shows page 4 - 6 out of 10 pages.

FAHP Approach to rank educational websites on Usability TABLE 1:FACTORS AFFECTING THE USABILITY OF A WEBSITE.C.Triangular Fuzzy numbersLinguistic variables simply approximate the individual perception of decision makers; the widely adopted triangular fuzzy number (TFN) approach is used to represent the uncertainty or vagueness of linguistic terms [21]. A TFN can be defined by a triplet low, medium, high as given below using the membership function: {} (1)The relationship betweenfuzzy number and corresponding linguistic variable which identify the important weights for each criteria and membership function is given in Table [2]. Table 2 Linguistic variable for importance weight of each criteria [16][22] Fuzzy number Linguistic Scales Membership function 1 Equally Important 1,1,3 3 Weak important 1,3,5 5 Essentially Important 3,5,7 7 Very strongly important 5,7,9 9 Absolutely Important 7,9,9 Ease of use download speed navigation accessibility personalization Availability Content Security Aesthetics Palmer( 2002)[6] Agarwal, Venkatesh (2002)[24] Tarafdar M. et. al.(2005)[25] Seethamraju, (2006)[26] Pearson J. et.al(2007)[27] Pearson & Pearson(2008) [28] Sindhuja & Dastidar (2009) [29] Nathan, R & Yeow, P 2009 [30] Toit M. , Bothma C,2010 [31] Hsiu-Fen Lin(2010)[3] Bringula, R. P.(2011) [32] Mirfa Manzoor(2012) [2] Nilashi et al.(2012)[33] Nagpal et.al.2013[1] Layla Hasan (2014)[34] Maristella Matera et.al. [35]
Background image
Int. J. Com. Dig. Sys. 4, No.4, 251-260 (Oct-2015)255 Various arithmetic operations that can be performed related to fuzzy numbers with triangular membership function are: Ifare two triangular fuzzy numbers then Addition: (Multiplication:Inverse: D.Algorithm In this paper Deng H. [23] approach is used for solving fuzzy multi criteria analysis where fuzzy pair wise comparison is done for qualitative data resulting in effective decision. The steps of Deng’s extent analysis can be modified as below: Formulate the decision problem as a Multi criteria Analysis problem and identify the hierarchical structure of the problem. Obtain the Normal paired comparability matrices (NPC) using AHP method and convert it into Fuzzy NPC using Table 2. Evaluate the Consistency Ratio (CR) [17] index of the matrices obtained in step (b).It should be less than 10% which shows the judgments are satisfactory. (2)Where, (3) =Maximum Eigen value N=Number of Criteria’sRI-Average Random Index As in the present discussion the four criteria’s are taken so the value of RI is 0.90 [17]. Fuzzy extent analysis can be applied to convert the fuzzy NPC to its corresponding criteria weights wtjand alternate Performance ratings pijof different website can be evaluated as: (4)Where i=1, 2…u and j=1…v, x and y =1...k and k=u or v relying on the fact whether we are evaluating the performance ratings of the alternatives or the weights of the criteria under study.
Background image
Image of page 6

You've reached the end of your free preview.

Want to read all 10 pages?

  • Fall '18
  • Zia Ul Rehman
  • Decision Making, Usability, Decision making software, AHP, Renuka Nagpal

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture