Table 6 The judgment matrix of P₁–P₄.

P₁

1

2

2

2

P₂

1/2

1

1/3

1/3

P₃

1/2

3

1

1/2

P₄

1/2

3

2

1

\(\begin{gathered} E = \left\{ {1.682,0.485,0.931,1.316} \right\}^{T} ,\lambda_{\max } = 4.215,CI = 0.072,CR = 0.08 < 0.1, \hfill \\ {\text{meet consistency requirements}} \hfill \\ \end{gathered}\)