$X_{ij}^v\in \left\{\mathrm{0,1}\right\}$	A binary variable to identify the sequence of demand points served by vehicle v. $X_{ij}^v=1$ if demand point i is processed by vehicle v immediately before processing demand point j; 0 otherwise.
$Y_{ki}^v\in \left\{\mathrm{0,1}\right\}$	A binary variable to identify an RC that can supply resources for demand point i with vehicle v. $Y_{ki}^v=1$ if the RC k supplies resources for demand point i with vehicle v; 0 otherwise.