helpQuestion $5$

$($a$)$ Consider the following product structure. Four hundred $(400)$ units of Product A are

needed. How many units of $B,C,D,E,F,$ and $G$ are needed?

$(5$ marks$)$

$($b$)$ Prepare your gross requirement schedule to identify the planned$-$order release using

an MRP program, if the gross requirement is $5,000$ units, inventory on hand is $1,200$

units, and planned receipts are $800$ units.

$(5$ marks$)$

$($c$)$ The Assignment Matrix below showing machine processing costs for each job. You

are required to formulate a minimum$-$cost assignment and form optimal assignment.

$(9$ marks$)$

$($d$)$ A work centre has five jobs assigned to it$.$ They are labelled, in the order of their

arrival to the customer, as jobs $A,B,C,D$ and $E.$ The work centre may work on only

one job at a time and must complete any job it starts before starting another job.

Job A has a processing time of $4$ days and due to the customer in $12$ days. Job B has

a processing time of $5$ days and due to the customer in $18$ days. Job C has a

processing time of $6$ days and due to the customer in $10$ days. Job $D$ has a

processing time of $4$ days and due to the customer in $9$ days. Job E has a processing

time of $6$ days and due to the customer in $16$ days. Using the Shortest Processing

Time$($SPT$)$ priority rule, calculate the total flow time, mean flow time and the

average lateness of these job orders.