a$-$b$)$ Using Johnson's rule for $2-$machine scheduling, the sequence is:

$\backslash$table$[[$Scheduled Order,Job$],[1,]]$

The following set of seven jobs is to be processed through two work centers at George Heinrich's printing company. The sequence is first printing, then binding. Processing time at each of the work centers is shown in the following table:

$\backslash$table$[[$Job$,$Printing $($hours$),$Binding $($hours$)],[T,1,3],[U,10,12],[$V$,8,7],[$W$,11,9],[x,4,6],[$Y$,2,13],[$Z$,5,14]]$