Question

1.

An order for 200 of a product is processed on operation A and operation B. The setup time on A is 30 minutes, and the run time per piece is 5 minutes. The setup time on B is 50 minutes, and the run time is 3 minutes per piece. It takes 30 minutes to move a lot between A and B. Now, It is decided to overlap the two operations by splitting the lot of 200 into two lots of 120 and 80. When the first lot is finished on operation A, it is moved to operation B where it is set up and run. Meanwhile, operation A completes the second lot of 80 and sends the units over to operation B. These 80 units should arrive as operation B is completing the first lot of 120 (If not, the operation B has to wait till the lot 2’s arriving. Then operation B will have an idle time); thus, operation B can continue without interruption until all 200 units are completed. The total manufacturing hours spent are:

Select one:

a. 21.67

b. None of them

c. 25.34

d. 22.16

e. 22.55

2.

An order for 300 of a product is processed on operation A and operation B. The setup time on A is 50 minutes, and the run time per piece is 6 minutes. The setup time on B is 30 minutes, and the run time is 4 minutes per piece. It takes 30 minutes to move a lot between A and B. Now, It is decided to overlap the two operations by splitting the lot of 300 into two lots of 200 and 100. When the first lot is finished on operation A, it is moved to operation B where it is set up and run. Meanwhile, operation A completes the second lot of 100 and sends the units over to operation B. These 100 units should arrive as operation B is completing the first lot of 200 (If not, the operation B has to wait till the lot 2’s arriving. Then operation B will have an idle time); thus, operation B can continue without interruption until all 300 units are completed. The total manufacturing hours spent are:

Select one:

a. 36

b. None of them

c. 37.5

d. 38

e. 37

Answer 1

1.

An order for 200 of a product is processed on operation A and operation B. The setup time on A is 30 minutes, and the run time per piece is 5 minutes. The setup time on B is 50 minutes, and the run time is 3 minutes per piece. It takes 30 minutes to move a lot between A and B. Now, It is decided to overlap the two operations by splitting the lot of 200 into two lots of 120 and 80. When the first lot is finished on operation A, it is moved to operation B where it is set up and run. Meanwhile, operation A completes the second lot of 80 and sends the units over to operation B. These 80 units should arrive as operation B is completing the first lot of 120 (If not, the operation B has to wait till the lot 2’s arriving. Then operation B will have an idle time); thus, operation B can continue without interruption until all 200 units are completed. The total manufacturing hours spent are:

None of them

2.

An order for 300 of a product is processed on operation A and operation B. The setup time on A is 50 minutes, and the run time per piece is 6 minutes. The setup time on B is 30 minutes, and the run time is 4 minutes per piece. It takes 30 minutes to move a lot between A and B. Now, It is decided to overlap the two operations by splitting the lot of 300 into two lots of 200 and 100. When the first lot is finished on operation A, it is moved to operation B where it is set up and run. Meanwhile, operation A completes the second lot of 100 and sends the units over to operation B. These 100 units should arrive as operation B is completing the first lot of 200 (If not, the operation B has to wait till the lot 2’s arriving. Then operation B will have an idle time); thus, operation B can continue without interruption until all 300 units are completed. The total manufacturing hours spent are:

None of them