In addition to cost$,$ SEN management has identified two other dimensions to consider: quality $($specifically$,$ the $\%$ of defectfree items$)$ and ontime delivery, SEN management has established importance weights of $0\mathrm{.}2,0\mathrm{.}5$ and $0\mathrm{.}3$ for cost, quality, and ontime delivery, respectively. Finally, purchasing experts at SEN have rated the performance of the current assembly operation and BMG with regard to these three dimensions. Their ratings $(1=$poor to $5=$excellent$)$ are as follows:Performance ratings