“…It aims to obtain clusters with cases (culling categories) that are as similar as possible to each other and as different as possible from cases (culling categories) belonging to other clusters [ 54 , 55 ]. This can be obtained by merging all possible cluster pairs and selecting, each time, the cluster with the minimum sum of squared deviations [ 56 , 57 , 58 , 59 ] using an approach based on the analysis of variance to determine the distance between clusters [ 55 , 60 , 61 , 62 , 63 ]. The measure of the distance between cases (culling categories) and the mean value of a given cluster was the error sum of squares ( EES ), given by the following formula [ 64 , 65 , 66 ]: where x i is the value of the variable that is a clustering criterion for the i th case, k is the number of cases (culling categories) within the cluster, is the mean value of this variable within the cluster.…”