What are multiple-dimension scheduling rules? Provide examples and discuss how each rule performs

What will be an ideal response?

Multiple-dimension rules, such as critical ratio (CR) and slack per remaining operations (S/RO) are so named because they apply to more than one aspect of the job. These multiple-dimension priority rules incorporate information about the remaining workstations at which the job must be processed, in addition to the processing time at the present workstation or the due date considered by single-dimension rules. Research studies have shown that S/RO is better than EDD with respect to the percentage of jobs past due, but worse than SPT and EDD with respect to average flow times. These studies also indicate that CR results in longer flow times than SPT, but CR also results in less variance in the distribution of past due hours.