Question $1$: $[25$ Marks$]$

The following table contains information on five customer orders that are awaiting processing at a packing center. Assume that orders are listed in order of arrival.

$\backslash$table$[[$Job$,\backslash$table$[[$Job Processing$],[$Time $($minutes$)]],\backslash$table$[[$Job Due$],[$Date $($minutes$)]]],[$Alpha$,60,70],[$Beta$,90,80],[$Chi$,100,75],[$Delta$,70,50],[$Gamma$,50,60]]$

a$.$ Determine the job sequence of the orders using $(1)$ EDD, and $(2)$ CR$.$

$]=[10$ marks

b$.$ For each of the two methods in part $($a$),$ determine $(1)$ the average job flow time; $(2)$ the average tardiness, and $(3)$ the average number of jobs at the work center. Which schedule rule should be used under each of the three measures of effectiveness?

$[15$ marks$]$