ASSIGNMENT CHAPTER 14 COURSE NAME PRODUCTION OPERATIONS MANAGEMENT

VIET NAM NATIONAL UNIVERSITY – HO CHI MINH CITY INTERNATIONAL UNIVERSITY  School of Business Administration ASSIGNMENT CHAPTER 14 COURSE NAME: PRODUCTION & OPERATIONS MANAGEMENT COURSE ID: BA164WE LECTURER: DR TRƯƠNG QUANG ĐƯỢC DATE OF SUBMISSION: 20/12/2020 CLASS: TUESDAY MORNING GROUP: 06 LIST OF MEMBERS: VĂN BẠT PHÚC TÀI BABAWE17149 VƯƠNG NHẬT NAM BABAWE18605 TRẦN MINH QUÂN BABAWE18610 NGUYỄN THỊ THUÝ MAI BABAWE18336 TRẦN THỊ HƯƠNG QUỲNH BABAWE18452 HỒ SĨ PHÚC BABAIU18168 TRẦN TRỊNH TÙNG BABAIU18236 VÕ THĂNG LONG BABAIU18105 ĐINH PHƯỚC THIỆN BABAIU18331 Exercise 14.1: Exploding the bill of material yields the following: Item J: 200 units Item K: 200*1 = 200 units Item L: 200 * = 800 units Item M: 200*2 = 400 units Exercise 14.3: The demand for subassembly S is 100 units in week Each unit of S requires unit of T and units of U Each unit of T requires unit of V, units of W, and unit of X Finally, each unit of U requires units of Y and units of Z One firm manufactures all items It takes weeks to make S, week to make T, weeks to make U, weeks to make V, weeks to make W, week to make X, weeks to make Y, and week to make Z a) Construct a product structure Identify all levels, parents, and components This structure has three levels: 0, 1, and There are three parents: S, T, and U Each parent item has at least one level below it Items T, U, V, W, X, Y and Z are components because each item has at least one level above it In this structure, T, and U are both parents and components The number in parentheses indicates how many units of that particular item are needed to make the item immediately above it b) Prepare a time-phased product structure Exercise 14.10: a A gross-requirements plan b A net materials Lot size Lead time (weeks) On hand Safety Ite stock m _ X1 Lotforlot B1 50 B2 A1 Lotforlot 20 _ C D E Lea requirements d time eek Week Required date Order release date Required date Order release date Required date Order release date Required date Order release date Required date Order release date Required date Order release date Required date (B1) Order release date (B1) Required date (D) Order release date (D) 50 50 20 10 40 50 20 40 80 40 80 10 10 40 20 10 10 20 20 20 40 20 40 50 12 10 10 10 20 wee k wee ks wee k 50 30 11 20 0 12 100 0 20 100 20 100 50 wee k wee 20 k 10 0 30 40 50 wee 50 ks wee ks 80 40 11 10 20 10 20 10 50 20 10 20 10 20 10 50 50 0 20 100 20 100 0 20 100 20 100 Planned order releases 30 Gross requirements 20 100 100 40 200 Scheduled receipts Lotforlot Lotforlot 20 20 _ _ _ _ B2 A1 Projected on hand 20 20 20 20 20 20 20 20 0 0 Net requirements 80 40 200 Planned order receipts 80 40 200 Planned order releases 80 40 200 Gross requirements 50 20 100 Scheduled receipts Projected on hand 5 5 5 0 0 Net requirements 45 20 100 Planned order receipts 45 20 100 Planned order releases 45 Gross requirements 20 200 100 80 400 Scheduled receipts Lotforlot _ _ C Projected on hand 0 0 _ _ D 0 0 Net requirements 200 80 400 Planned order receipts 200 80 400 Planned order releases Lotforlot 200 Gross requirements 80 100 400 40 200 Scheduled receipts Projected on hand 0 0 0 0 Net requirements 100 40 200 Planned order receipts 100 40 200 Planned order releases 100 Gross requirements 40 50 200 20 100 Scheduled receipts Lotforlot 10 _ _ E Projected on hand 10 10 _ _ E 10 10 10 10 0 0 Net requirements 40 20 100 Planned order receipts 40 20 100 Planned order releases Lotforlot 10 Gross requirements Scheduled receipts 40 20 100 100 80 400 Projected on hand 0 0 0 0 Net requirements 100 80 400 Planned order receipts 100 80 400 Planned order releases 100 80 400 Exercise 14.11: a Gross requirements plan for Item C Week Lead Time A H C Required date Order release date Required date Order release date Required date Order release date 100 100 10 50 100 12 150 week 50 150 100 50 week 150 week s 100 100 11 50 100 100 50 50 50 50 150 b Net requirements for item C is shown in the below table Net requirements for item A: Level: Parent: -Lead Item: A Time: 1 Gross requirements Projected on-hand Inventory 100 0 0 0 Net requirements Planned order receipts Planned order releases Net requirements for item H: Level: Item: H Week 0 10 12 15 0 15 15 50 0 100 50 100 50 10 11 15 50 Parent: -Lead Time: 1 Week 10 11 12 Gross requirements Projected on-hand Inventory Net requirements Planned order receipts Planned order releases 100 0 0 0 0 100 100 50 50 Parent: -Lead Time: Item: C 50 50 50 Week 10 50 50 50 50 Net requirements Planned order receipts Planned order releases 50 50 10 100 50 50 50 50 50 50 50 50 0 50 50 0 0 10 11 15 12 50 10 10 50 Exercise 14.17: Period Gross requirements 30 40 30 70 20 10 10 80 11 12 50 *Holding cost = $2.50/unit/week; setup cost = $150; lead time = week; beginning inventory = 40; stockout cost = $10 Lot – for – lot table: Period (weeks) Gross requirements Begin 40 inventory End inventory Net 50 100 Net requirement for item C: Level: Gross requirements Projected on-hand Inventory 50 30 40 30 70 20 10 10 80 11 12 50 40 10 10 0 0 0 0 10 10 30 0 30 70 20 0 10 80 0 50 10 requirements Order receipts Order releases 30 30 30 30 70 70 20 20 10 10 80 80 50 50 Total relevant cost = Order cost + Holding cost = orders * $150 + = $1050 Exercise 14.18: Annual usage = 330 units for 12 weeks; weekly usage = 330/12=27.5 per week Therefore, 27.5 units * 52 weeks (annual demand) = 1,430 D = Annual demand = 1,430 S = Setup cost = $150 H = Holding cost on annual per unit = $2.5 * 52 = $130 2∗ D ∗ S = 2∗1,430∗150 =57.44 ≈ 57 units ¿ Q= H 130 √ Period Gross Requirements Scheduled receipts Projected on hand Net requirements Planned order receipts Planned order releases √ 30 40 30 70 20 10 10 80 11 12 50 40 0 10 0 10 30 57 27 0 27 57 54 16 57 41 0 21 0 21 0 11 69 114 45 0 45 57 57 57 57 0 114 57 Total projected on hand=10 + 10 + 27 + 27 +54 + 41+ 21 + 21 + 11 + 45 + 45=312 units Holdingcost =312 units∗$ 2.5=$ 780 Setup cost=5 orders∗$ 150=$ 750 Total cost for EOQ lot sizing=$ 780+$ 750=$ 1,530 11 ...Exercise 14. 1: Exploding the bill of material yields the following: Item J: 200 units Item K: 200*1 = 200 units Item L: 200 * = 800 units Item M: 200*2 = 400 units Exercise 14. 3: The demand... 20 10 10 80 11 12 50 40 0 10 0 10 30 57 27 0 27 57 54 16 57 41 0 21 0 21 0 11 69 114 45 0 45 57 57 57 57 0 114 57 Total projected on hand=10 + 10 + 27 + 27 +54 + 41+ 21 + 21 + 11 + 45 + 45=312... requirements 100 80 400 Planned order receipts 100 80 400 Planned order releases 100 80 400 Exercise 14. 11: a Gross requirements plan for Item C Week Lead Time A H C Required date Order release date