Can someone please answer this (8 marks: 2, 1, 5) 2. Consider the scissors on th
ID: 326508 • Letter: C
Question
Can someone please answer this
(8 marks: 2, 1, 5) 2. Consider the scissors on the right. It is made by blanking a sheet of metal to form the metal strips, sharpening each blade into a plastic grip, and attaching two halves together with a screw. The production process is as follows: one edge of each metal strip to make blades, inserting Sheet t eal blanking sharpening plastic insertion assembly of two halves Plastic grip Product structure tree for Scissors is as follows: Scissors Half Scissor (2) Screw Blade Plastic grip Metal strip Sheet metal We have promised to ship 1,100 scissors in the morning of April 13. The plastic grips are bought from a manufacturer that needs 2 days of lead-time. The 10 cm wide roll of sheet metal (10 meters long) is bought from a distributor that needs 1 day lead-time. Each metal strip is 10 cm long and 2 cm wide. Each operation (blanking, sharpening, plastic insertion, and assembly of 2 halves) takes approx. 10 seconds per unit and is done in a different workstation. Assume the whole batch is done before it is moved to the next workstation, and that the move is done without much delay. The shop is open 8 hours a day, 5 days a week. a. Show that the mapufacturing lead-time of each operation for this batch is less than 1 day. 1 b. Show that each metal piece is approx 2/1000 of a roll of sheet metal If there is 2 roll of sheet metal in stock, safety stock is 1 roll, and lot size for sheet metal roll is 6, perform MRP for the scissors and all its components except the screw. Use the tables on the next page and lot-for-lot ordering for all other items. C. amnsExplanation / Answer
(a)
Since the process at each station will be done in batches, the manufacturing lead time for each operation is -
1100*10 = 11,000 seconds = 11,000/(8*60*60) days = 0.38 days
(b)
The total area of projection for the sheet metal roll = 10 cm x 1000 cm = 10,000 sqcm.
The total area of projections for one strip = 10 x 2 = 20 sqcm.
So, one metal strip is approximately 20/10000 = 2/1000 of a roll.
(c)
6 9 10 11 12 13 Scissors Gross requirement 1100 Quantity = - Scheduled receipt Per parent = - Projected on hand 0 0 0 0 0 0 On hand = 0 Net requirement 0 0 0 0 0 1100 Lot size = LFL Planned order receipt 0 0 0 0 0 1100 LT = 1 Planned order release 0 0 0 0 1100 0 Half Scissor Gross requirement 0 0 0 0 2200 0 Quantity = 2 Scheduled receipt Per parent = Scissor Projected on hand 0 0 0 0 0 0 On hand = 0 Net requirement 0 0 0 0 2200 0 Lot size = LFL Planned order receipt 0 0 0 0 2200 0 LT = 1 Planned order release 0 0 0 2200 0 0 Blade Gross requirement 0 0 0 2200 0 0 Quantity = 1 Scheduled receipt Per parent = H. scissor Projected on hand 0 0 0 0 0 0 On hand = 0 Net requirement 0 0 0 2200 0 0 Lot size = LFL Planned order receipt 0 0 0 2200 0 0 LT = 1 Planned order release 0 0 2200 0 0 0 Metal strip Gross requirement 0 0 2200 0 0 0 Quantity = 1 Scheduled receipt Per parent = Blade Projected on hand 0 0 0 0 0 0 On hand = 0 Net requirement 0 0 2200 0 0 0 Lot size = LFL Planned order receipt 0 0 2200 0 0 0 LT = 1 Planned order release 0 2200 0 0 0 0 Sheet metal SS=1 Gross requirement 0 4.4 0 0 0 0 Quantity = 0.002 Scheduled receipt Per parent = Metal strip Projected on hand 2 3.6 3.6 3.6 3.6 3.6 On hand = 2 Net requirement 0 3.4 0 0 0 0 Lot size = 6 Planned order receipt 0 6 0 0 0 0 LT = 1 Planned order release 6 0 0 0 0 0 Plastic grip Gross requirement 0 0 0 2200 0 0 Quantity = 1 Scheduled receipt Per parent = H. scissor Projected on hand 0 0 0 0 0 0 On hand = 0 Net requirement 0 0 0 2200 0 0 Lot size = LFL Planned order receipt 0 0 0 2200 0 0 LT = 2 Planned order release 0 2200 0 0 0 0