Assignment #2_Vycao (1)
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Southeast Missouri State University *
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301
Subject
Industrial Engineering
Date
Dec 6, 2023
Type
docx
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4
Uploaded by tramnguyen12325
Assignment #2: Chapter 3 Questions
1.
What four functions does the master production schedule (MPS) perform in the production planning system?
It forms the link between production planning and what manufacturing will build.
It forms the basis for calculating the capacity and resources needed.
It drives the materials requirements plan. As a schedule of items to be built, the MPS and bills of materials determine what components are needed from manufacturing and purchasing.
It keeps priorities valid. The MPS is a priority plan for manufacturing.
2.
What is a planning horizon?
A planning horizon is the length of time for which a plan is prepared. It's the amount of time an organization will look into the future when preparing a strategic plan.
3.
What is the ATP (available to promise)? How is it calculated?
ATP is that portion of a firm's inventory and planned productions that is not already committed and is available for the customer. This allows delivery promises to be made and customer orders and deliveries to be scheduled accurately.
The ATP is calculated by adding scheduled receipts to the beginning inventory then subtracting actual orders schedule before the next scheduled receipt.
4.
What is the purpose of time fences?
The purpose of a time fence is to maintain a reasonably controlled flow through the production system. They are defined as periods of time having some specified level of opportunity for the customer to make changes. 3.2 The Shades Sunglass Company assembles sunglasses from frames, which it makes, and lenses, which it purchases from an outside supplier. The sale department has prepared the following 6-week forecast for Ebony, a popular model. The sunglasses are assembled in lots of 220, and the opening inventory is 300 pairs. Complete the projected available balance and the master production schedule.
Week
1
2
3
4
5
6
Forecast Sales
200
300
300
200
150
150
Projected Available Balance
300
100
20
160
180
30
100
Net requirement
0
200
280
40
0
120
MPS
0
220
440
220
0
220
3.8 Given the following data, calculate how many units are available to promise
. There are zero units on hand.
Week
1
2
3
4
5
6
Customer Orders
21
17
8
3
MPS
30
30
30
ATP
9
13
22
-3
0
0
3.15 Given the following data, calculate the projected available balance and the planned MPS receipts.
The lot size is 100. The demand time fence is 2 weeks.
Week
1
2
3
4
Forecast
50
50
50
50
Customer Orders
60
30
65
25
Projected Available Balance
60
0
70
5
55
MPS
100
100
Chapter 4 Questions
1.
What is a materials requirement plan?
It is a technique that uses bill of materials, Inventory Data, and Master production schedule to calculate the requirement for materials.
2.
What is a bill of material?
A record of all the components of an item, the parent-component relationships, and the usage quantities derived from engineering and process designs.
3.
What is a planned order? How is it created?
A planned order is a proposal to produce a material in-house or to acquire it externally. It is a planning tool and can be changed or deleted most of the time with no impact on the system.
Planned order release—when an order should be released, offset by lead time from the planned order receipt.
4.
What is a scheduled receipt?
Scheduled receipts/open orders—orders placed on manufacturing or on a vendor representing a commitment to make or buy.
4.7 Complete the following table. Lead time for the part is 2 weeks. The lot size is 100. What is the projected available at the end of the week 3? When is it planned to release an order?
Week
1
2
3
4
Gross Requirements
Scheduled Receipts
Projected Available 20
Net Requirements
Planned Order Receipt
Planned Order Release
60
100
0
0
82
50
0
100
50
0
0
20
0
100
80
180
0
20
0
The projected available at the end of Week 3 is 100, and the planned order release for Week 1
is 82.
4.9 MPS parent X has planned order releases of 30 in weeks 2 and 4. Given the following product tree, complete the MRP records for parts Y and Z. Quantities required are shown in brackets.
X
Y(1)
S
Z(2)
T
Part Y
Lead Time: 2 weeks
Lot Size: 50
Week
1
2
3
4
Gross Requirements
Scheduled Receipts
Projected Available 30
Net Requirements
Planned Order Receipt
Planned Order Release 30
0
30
0
30
30
0
0
0
50
30
0
0
0
0
0
30
20
30
50
0
Part Z
Lead Time: 1 week
Lot Size: 100
Week
1
2
3
4
Gross Requirements
Scheduled Receipts
0
0
100
0
0
0
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Projected Available 20
Net Requirements
Planned Order Receipt
Planned Order Release 20
0
0
100
40
80
100
0
20
0
0
0
20
0
0
0