SCM 4362 Quiz 5
Which of the following statements is correct?
All of the statements are correct.
Which of the following statement(s) is (are) correct?
All options are true
PAC is located in which part (phase) of the MPC framework?
Back end
The prime objective of PAC is:
Executing MPC plans
An implicit enumeration technique, like a branch and bound, is a heuristic method as it does not evaluate all the possible enumerations of the combinatorial problem.
False
At any time, if a set of n jobs is to be scheduled on m machines, there are (n*m) ways to schedule the jobs.
False
In MRP, the only source of uncertainty is supply.
False
Johnson's rule when applied in a two-machine case will provide minimum average lateness
False
Production activity control (PAC) focuses on material requirement plans
False
The Critical Ratio rule uses the information about the processing time of the job in the current work center only.
False
Priority sequencing rules determine which of the following? I- Allocation of goods to customers II- Which machine to service next? III- Which job to work on at the work center?
III only
Which of the below lot-sizing procedures provide an optimal solution in MRP lot-sizing?
KBB
Which one of the following lot-sizing rules guarantees an optimal solution in a general MRP environment?
KBB
Freezing the schedule is one way of mitigating
MRP system nervousness
The total time to process an entire set of jobs at a work center is referred to as
Make-span
Summing the setup times and run times for all remaining operations, and subtracting this from the time remaining until the due date is referred to as
Order Slack (ST) rule
The lowest planning and control level in MPC is:
PAC
A critical information service provided by MRP is apprising the SFC systems of all changes in material plans
True
A negative SPO (Slack per remaining operations) of a job implies that the job is already late
True
A small change caused by a relatively minor shift in the MPS may amplify the explosion process and use of the discrete lot-sizing procedures.
True
Both safety stock and safety lead time approaches produce an increase in inventory levels to provide a buffer against uncertainty.
True
KBB sometimes may yield the same total cost (cost of ordering + cost of carrying) as when some other Lot sizing method is used
True
LFL and POQ are the same when T =1
True
MRP lot-sizing procedures are designed specifically for the discrete demand case.
True
The SPT rule represents the best way to pick the next job to run, if the objective is to minimize average time per job, to minimize average number of jobs in the system, or to minimize average job lateness.
True
The lot-sizing procedure used for a parent part in an MRP system has a direct impact on the gross requirements data passed to its component parts.
True
The primary connection between PAC and the rest of the MPC systems comes from material requirements plans.
True
The routing specifies each operation to be performed to make the part and which work center will perform the operation.
True
When ordering costs are relatively small compared to inventory carrying costs, LFL will yield favorable results
True
When several jobs arrive at a work center, there is a need for
a system of scheduling and prioritizing
Which of the following statements is correct about complete enumeration?
all possible alternatives are evaluated and compared to pick the best solution.
Safety stock and safety lead-time are mechanisms to cope with
all the options are valid.
Which of the following statements is correct about implicit enumer
only promising alternatives are judiciously selected & evaluated.
Which of the following statements is correct about implicit enumeration?
only promising alternatives are judiciously selected & evaluated.
One way of dealing with the shop-floor complexity is by
priority sequencing rules
Sequencing rules are used to establish
the priorities for the jobs in a queue waiting to be processed at a work center.
