Operations Management: Sustainability and Supply Chain Management (12th Edition)
12th Edition
ISBN: 9780134130422
Author: Jay Heizer, Barry Render, Chuck Munson
Publisher: PEARSON
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Chapter 17, Problem 3DQ
Summary Introduction
To define: The notion of “infant mortality”
Introduction: Reliability is the probability that a product can perform over a specific period. It is the consistency of the product to perform in the same way for a particular period of time.
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QUESTION 2
A. In Akhwan Company, operations director Mr Tamad recently realized there had been an
increase in products failing during the final quality checks. These checks were carried out
in the QC (quality control) laboratory, which tested finished goods products before being
released for sale. The product failure rate had risen from 1% to 4% in two years' time which
meant an increase of hundreds of items of output a month which were not sold to Akhwan's
customers. The failed products had no value to the company once they had failed QC as the
rework costs were not economic. Because the increase was gradual, it took a while for Mr
Tamad to realize that the failure rate had risen.
A thorough review of the main production operation revealed nothing that might explain the
increased failure and so attention was focused on the QC laboratory. For some years, the
QC laboratory at Ikhwan, managed by Ramly, had been marginalized in the company, with
its two staff working in a remote…
Question 9
Quality impacts:
O Product design
O The supplier
O Maintenance
O The customer
O All are true
QUESTION 7
Write any TWO disadvantages of asking open questions in a Questionnaire.
List any TWO advantages of PILOTING a questionnaire.
Briefly explain any ONE method of measuring reliability.
Chapter 17 Solutions
Operations Management: Sustainability and Supply Chain Management (12th Edition)
Ch. 17 - Prob. 1DQCh. 17 - Prob. 2DQCh. 17 - Prob. 3DQCh. 17 - Prob. 4DQCh. 17 - Prob. 5DQCh. 17 - Prob. 6DQCh. 17 - Prob. 7DQCh. 17 - Prob. 8DQCh. 17 - Prob. 9DQCh. 17 - Prob. 10DQ
Ch. 17 - Prob. 1PCh. 17 - Prob. 2PCh. 17 - Prob. 3PCh. 17 - Prob. 4PCh. 17 - Prob. 5PCh. 17 - Prob. 6PCh. 17 - Prob. 7PCh. 17 - Prob. 8PCh. 17 - Prob. 9PCh. 17 - Prob. 10PCh. 17 - Prob. 11PCh. 17 - Prob. 12PCh. 17 - Prob. 13PCh. 17 - Prob. 14PCh. 17 - Prob. 15PCh. 17 - Prob. 18PCh. 17 - Prob. 19PCh. 17 - Prob. 20PCh. 17 - Prob. 21PCh. 17 - Prob. 1VCCh. 17 - Prob. 2VCCh. 17 - Prob. 3VC
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- Question 5 A.How can benchamrks assist in performing quality assurance? B. List at least FIVE (5) tools that can be used to control qualityarrow_forwardQuestion Provide two situations when new products do not need testing in the realistic market B Ff =而arrow_forwardQUESTION 6 (MAINTENANCE AND RELIABILITY: COMPARING PREVENTIVE AND BREAKDOWN MAINTENANCE COSTS) 17.24 Wharton Manufacturing Company operates its 23 large and expensive grinding and lathe machines from 7 A.M. to 11 P.M., 7 days a week. For the past year, the firm has been under contract with Simkin and Sons for daily preventive maintenance (lubrication, cleaning, inspection, and so on). Simkin's crew works between 11 P.M. and 2 A.M. so as not to interfere with the daily manufacturing crew. Simkin charges $645 per week for this service. Since signing the maintenance contract, Wharton Manufacturing has noted an average of only three breakdowns per week. When a grinding or lathe machine does break down during a working shift, it costs Wharton about $250 in lost production and repair costs. After reviewing past breakdown records (for the period before signing a preventive maintenance contract with Simkin and Sons), Wharton's production manager was able to summarize the following patterns: 1…arrow_forward
- Question 25 VQA stands for: O Village, Quality, Allegiance O Vintners Quality Alliance O Variation, Quality, Association O Vintners Quality Assurancearrow_forwardQuestion 3 In model M/M/ s =4 / FCFS / 0 / 00, with A = 3, and u = 10 the P(j 2s) is? O a. PU 2s) = 0.03 O b. PU 25) = 0.00 O C. P( 2s) = 0.5 O d. Pj 25) = 4arrow_forwardQuestion 8 How can a researcher differentiate between reliability and validity?arrow_forward
- Question 11 The primary focus of quality is: O Maintenance O The product O The customer O Manufacturingarrow_forwardQUESTION 15 Tradeoff analysis on different design concepts are performed and the data obtained are shown in Table Q15.1. The manufacturing cost of the design concept has been estimated and the reliability score of each design concepts has been ranked on a scale of 1-5. In both cases, low scores are considered good. The customer has agreed weighting factors of 55% for reliability and 45% for manufacturing cost. Table Q15.1: Trade-off data (low scores good) Design Concepts Reliability Score (15) Manufacturing Cost (Em) W B C Normalise the score by the maximum value, complete the trade-off and rank the options (1-best option) A D JA 4 410 VE B 3 507 C 2 483 D 1 438 E 2 457arrow_forwardQUESTION 1(a) I. Explain the concept of reliability and function of reliability engineering. II. Give three (3) reasons for studying reliability III. State three (3) major steps to take to accomplish reliability engineering IV. What is product life cycle? State the stages involved in product life product.arrow_forward
- QUESTION 5 According to COBIT5, stakeholders' needs influence stakeholders' drivers. True O Falsearrow_forwardQUESTION 6 Which of the following is not a typical source for new product ideas: Brainstorming session Outsourcing Reverse engineering Customer input Alpha testingarrow_forward1arrow_forward
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