The following table shows orders to be processed at a machine shop. Processing times are in

days. $$Due$$ is the number of date left until Due date. Jobs are listed in order of arrival.

a$)$ Determine the processing sequence using SPT$($Shortest Processing Time first$)$

C$-$A$-$E$-$B$-$D

b$)$ What is the average tardiness by SPT$?8$ days

c$)$ Determine the processing sequence using EDD$($Earliest Due Date first$)$

D$-$B$-$A$-$C$-$E

d$)$ What is the average tardiness by EDD? $5\mathrm{.}8$ days

Jobs Processing time Due

A $820$

B $1018$

C $525$

D $1117$

E $935$