$5-1)$ A Two machines center in a job shop for a local fabrication company has five unprocessed jobs remaining at a particular point in time. The jobs are labeled A$,$ B$,$ C$,$ D$,$ and E in the order that they entered the shop. The respective processing times, due dates and penalties are given in the table below.Sequence the $6$ jobs by next $3$ rules and compare results based on fotal finish time, average waiting time,

total lateness, total penalty and machine utilization.

$(15$ marks$)$

$1-$MP$-$rule.

$2-$ LIFS$-$rule.

$3-$ Try solving the question with the following processing order $[$B$-$A$-$E$-$C$-$D$].$

$5-2)$ The final assembly of no name personal computers, a generic mail$-$order PC clone, requires a total of

$12$ tasks. The assembly is done at the Lubbock, Texas, plant using various components imported from the

Far East. The production rate is a unit $\frac{?}{18}$ minutes. The job times and precedence relationships for this

problem are summarized in the table below.

$(12$ marks$)$

$1-$ The network of this particular problem.

Evaluate the minimum number of work stations.

$3-$ Evaluate the cycle time.

$4-$ Evaluate the efficiency.

$5-$ Processes chart for this cycle time.

Actual work station and its tasks.