1 Correction to: Annals of Operations Research https://doi.org/10.1007/s10479-020-03718-1

This erratum is published due to proofing error as author corrections with equation 1 were overlooked.

Equation 1 should be read as:

$$ r_{ij} = \frac{{x_{ij} }}{{\sqrt {\sum\nolimits_{i = 1}^{n} {(x_{ij} )^{2} } } }} \in [0,1]\quad 1 \le i \le n,\quad 1 \le j \le m. $$
(1)

Original article has been thus updated.