*2.1. PIPRECIA Method*

The pivot pairwise relative criteria importance assessment (PIPRECIA) method for determining the weights of criteria was proposed by Stanujkic et al. [46], as one of the extensions of the step-wise weight assessment ratio analysis (SWARA) method. Although it is a relatively new method, so far, the PIPRECIA method is applied for solving problems of personnel selection [47], assessment of ICT [48,49], supplier selection [50], mining method selection [51], and so forth.

The computational procedure of the PIPRECIA method can be demonstrated through the following steps [46]:

Step 1. Determination of the set of the evaluation criteria.

Step 2. Starting from the second criterion, it is necessary to determine the relative importance *s<sup>j</sup>* of the criterion *j* in relation to the previous (*j* − 1) criterion:

$$s\_j = \begin{cases} > 1 & \text{when significance of } \mathbb{C}\_j \succ \mathbb{C}\_{j-1} \\ 1 & \text{when significance of } \mathbb{C}\_j = \mathbb{C}\_{j-1} \\ < 1 & \text{when significance of } \mathbb{C}\_j \prec \mathbb{C}\_{j-1} \end{cases} \tag{1}$$

Step 3. Calculation of the coefficient *k<sup>j</sup>* as follows:

$$k\_j = \begin{cases} 1 & j = 1 \\ 2 - s\_j & j > 1 \end{cases} \tag{2}$$

Step 4. Calculation of the recalculated weight *q<sup>j</sup>* as follows:

$$q\_j = \begin{cases} 1 & j = 1 \\ \frac{q\_{j-1}}{k\_j} & j > 1 \end{cases} \tag{3}$$

Step 5. Calculation of the relative weights of the evaluation criteria as follows:

$$w\_{\bar{j}} = \frac{q\_{\bar{j}}}{\sum\_{k=1}^{n} q\_k} \tag{4}$$

where *w<sup>j</sup>* represents the relative weight of the criterion *j*.
