Please insert Figure 1 about here
Figure 1. Hierarchical structure of factors
Experts estimate activities using triangular fuzzy numbers and the
following values of the fuzzified Saaty’s scale: identical (1,1,1),
equally significant (1,1,3), more significant (1,3,5), much more
significant (3,5,7), markedly more significant (5,7,9); dominant
(7,9,9). The factors are compared in groups, and pairwise comparison
matrices are formed.
The weights of individual experts are defined by gamma
coefficient.35 Based on the experience of an
individual expert in the analysis of activity in the operating rooms
(denoted by bk ), and experience in the analysis
of activities in operating rooms adapted to certain types of operations
(denoted by ck ), the value ofγk is determined. The scale for describing
experience is 1 to 5. Based on Eq. (5),35 a weight
vector of experiment Γ is obtained:Γ={ 0.09,0.13,0.09,0.19,0.13,0.13, 0.09,0.06,0.06,0.04} .
On the basis of row geometric mean method (RGMM), aggregated matrices
are determined. The consistency of individual expert comparison is
verified using consistency index (CI), while the consistency of group
decision-making is determined by centric consistency index
(CCI).37 Defuzzification is obtained using the mean
aggregated weight method.
The aggregated matrix based on the comparison of criteria groups in
relation to the goal is presented in Table 2.
Table 2. The aggregated matrix for groups of factors