OPERATIONS MANAGEMENT IN THE SUPPLY CHAIN: DECISIONS & CASES (Mcgraw-hill Series Operations and Decision Sciences)
7th Edition
ISBN: 9780077835439
Author: Roger G Schroeder, M. Johnny Rungtusanatham, Susan Meyer Goldstein
Publisher: McGraw-Hill Education
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Question
Chapter 9, Problem 1P
a)
Summary Introduction
To determine: The sample size (n) and explain the significance of 100 days used to identify the average proportion defective.
b)
Summary Introduction
To determine: The center line, UCL, and LCL using three σ.
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Students have asked these similar questions
The quality assurance manager is assessing the capability of a process that puts pressurized grease in an aerosol can. The design specifications call for an average of 60 pounds per square inch (psi) of pressure in each can with an upper specification limit of 65 psi and a lower specification limit of 55 psi. A sample is taken from production and it is found that the cans average 61 psi with a standard deviation of 2 psi. What is the capability of the process? What is the probability of producing a defect?
Boston Electric Generators has been getting many complaints from its major customer, Home Station, about the quality of its
shipments of home generators. Daniel Shimshak, the plant manager, is alarmed that a customer is providing him with the only
information the company has on shipment quality. He decides to collect information on defective shipments through a form he has
asked his drivers to complete on arrival at customers' stores. The forms for the first 285 shipments have been turned in. They show
the following over the past 8 weeks:
Week
1
234567
8
This exercise contains only part c.
No. of
Shipments
23
31
30
37
35
42
43
44
No. of
Shipments Incorrect
with
Bill of
Defects
10
11
11
12
12
14
15
16
Reason for Defective Shipment
Lading
4
1
3
4
5
4
Incorrect Damaged Trucks
Truckload Product
Late
4
5
5
4
5668
2
7212N 3 AN
4
2
0
4
3111C
2
Boston Electric Generators has been getting many complaints from its major customer, Home Station, about the quality of its shipments of home generators. Daniel Shimshak, the plant manager, is alarmed that a customer is providing him with the only information the company has on shipment quality. He decides to collect information on defective shipments through a form he has asked his drivers to complete on arrival at customers' stores. The forms for the first
287
shipments have been turned in. They show the following over the past 8 weeks:
Week
No. of
Shipments
No. of
Shipments with Defects
1
23
10
2
31
11
3
32
12
4
39
13
5
35
12
6
40
14
7
41
14
8
46
17
This exercise contains only part a.
a) Using the point drawing tool eight times, develop a scatter diagram using total number of shipments and number of defective shipments.
Part 2
Chapter 9 Solutions
OPERATIONS MANAGEMENT IN THE SUPPLY CHAIN: DECISIONS & CASES (Mcgraw-hill Series Operations and Decision Sciences)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, operations-management and related others by exploring similar questions and additional content below.Similar questions
- Why are prevention and appraisal costs considered costs of controlling quality, whereas internal and external failure costs are costs of failing to control quality?arrow_forwardBoston Electric Generators has been getting many complaints from its major customer, Home Station, about the quality of its shipments of home generators. Daniel Shimshak, the plant manager, is alarmed that a customer is providing him with the only information the company has on shipment quality. He decides to collect information on defective shipments through a form he has asked his drivers to complete on arrival at customers' stores. The forms for the first 288 shipments have been turned in. They show the following over the past 8 weeks: No. of Reason for Defective Shipment Shipments Incorrect No. of Shipments Defects with Bill of Incorrect Damaged Trucks Week Lading Truckload Product Late 1 23 31 32 39 10 4 5 2 4 2 3 4 11 1 4. 1 4 5 12 13 13 14 15 16 5 2 36 5 4 6 7 40 43 44 6 3 6. 1 This exercise contains only part a. a) Choose the correct scatter diagram below using total number of shipments and number of defective shipments. OA. OB. Oc. D. 20- 20- 20- 00 10- 10어 이 0+ 20 26 32 38 44…arrow_forwardBriefly discuss how the following methods can be used to improve quality: Quality Function Deployment Statistical Process Controlarrow_forward
- In the past, Alpha Corporation has not performed incoming quality control inspections but has taken the word of its vendors. However, Alpha has been having some unsatisfactory experience recently with the quality of purchased items and wants to set up sampling plans for the receiving department to use. For a particular component, X, Alpha has a lot of tolerance percentage defective of 10 percent. Zenon Corporation, from which Alpha purchases this component, has an acceptable quality level in its production facility of 3 percent for component X. Alpha hasa consumer’s risk of 10 percent and Zenon has a producer’s risk of 5 percent.a. When a shipment of product X is received from Zenon Corporation, what sample size should the receiving department test?b. What is the allowable number of defects in order to accept the shipment?arrow_forwardA bottle-filling process has a lower specification limit of 0.99 liter and an upperspecification limit of 1.01 liters. The standard deviation is 0.005 liter and the mean is 1 liter.What is the process capability index for the bottle-filling process?arrow_forwardA credit card company deals with many hundreds of thousands of transactions every week. One of its measures of the quality of service it gives its customers is the dependability with which it mails customers’ monthly accounts. The quality standard it sets itself is that accounts should be mailed within two days of the ‘nominal postdate’ which is specified to the customer. Every week the company samples 1,000 customer accounts and records the percentage which was not mailed within the standard time. When the process is working normally, only 2 per cent of accounts are mailed outside the specified period, that is, 2 per cent are ‘defective’. Compute the control limits for the processarrow_forward
- Write, in your own words, what is the objective of the Statement of Quality Control Standard number 8 (SQCS No. 8)arrow_forwardWhich of the following is not a prevention activity in controlling quality? Multiple Choice Field testing. Certifying suppliers. Quality training. Process improvement.arrow_forwardK- The Tyler Apiaries sells bees and beekeeping supplies Bees (including a queen) are shipped in special packages according to weight. target weight of a package is 1.2 kg. Historically, Tyler's shipments have weighed on average 1 2 kg, with a standard deviation of 0.07 kg a. The lower and upper tolerance limits are 1.1 kg and 1.3 kg, respectively The process capability ratio is 0476 (Enter your response rounded to three decimal places) capable of meeting the tolerance limits 99 7% of the time Tyler Apiariesarrow_forward
- One of the stages in the process of making denim cloth at the Southern Mills Company is to spin cotton yarn onto spindles for subsequent use in the weaving process. Occasionally the yarn breaks during the spinning process, and an operator ties it back together. Some number of breaks is considered normal; however, too many breaks may mean that the yarn is of poor quality. In order to monitor this process, the quality-control manager randomly selects a spinning machine each hour and checks the number of breaks during a 15-minute period. Following is a summary of the observations for the past 20 hours. Construct a c-chart using 3 limits for this process and indicate if the process was out of control at any time.arrow_forwardYou are a Quality Manager for a very well-known food ingredient company that produces monosodium glutamate (MSG), and you are responsible for setting specification limits. The net weight (in grams) of bags of monosodium glutamate (MSG) is monitored by taking samples of eight bags on an hourly basis during production. The label on every bag reports a contents of 2 kg flour. The process mean is μ = 2018 g, and when the process is properly adjusted, it varies with σ = 16 g. QUESTION: Your organisation strives to ensure that >99.99% of bags of monosodium glutamate produced conforms to specification. What performance process index value is required to achieve this process yield?arrow_forwardA toy manufacturer wants to apply Six Sigma to its manufacturing process. The product will be examined by the inspection team using a predetermined standard. A product is considered defective if it doesn't satisfy a requirement. Each item may have as few as no flaws or as many as six. One product was discovered to be faulty after the inspection crew examined roughly 1000 goods. Determine the DPMO for the process and provide feedback on its suitability for six sigma.arrow_forward
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