The mean item score for each factor within groups is calculated to obtain the relative importance index Odusami 2002, Kumaraswamy and Chan 1996, Chinyio et al., 1998, Cheung et al., 2000, Tarn et al, 2000:
Se calcula la media del puntaje para cada factor dentro de los grupos para obtener el índice de importancia relativa Odusami 2002, Kumaraswamy and Chan 1996, Chinyio et al., 1998, Cheung et al., 2000, Tam et al., 2000: