QUESTION$1$:

In a single product, two$-$stage distribution system, there are two plants $($P$1,$ P$2)$ and two customers $($C$1,$ C$2).$ Three candidate warehouse locations $($W$1,$ W$2,$ W$3)$ will be evaluat

It is decided to serve each customer from a single warehouse. The demands of $C1$ and $C2$ are estimated as $7000$ units and $1500$ units, respectively. Other related data are provider

Construct the location$-$allocation model of the system $($Define the decision variables explicitlyl$).$