Bus 328 Unit 4

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Tiffany Ayers
BUS 328
Unit 4: Review Assignment
September 21, 2017

Chapter 13
1. What does the upper control limit of a p, np, c, or u chart tell us about the process? What does the lower control limit tell us?
Lower control limit is rounded up to 0 if np chart does have a negative value. Upper limit in p, np, c or u charts, generally known as attributes chart controls how much extent the variability in the system is allowed.

2. Distinguish between variable data and attribute data.
Variable data is quantitative data that can be discrete or continuous. Attribute data is the lowest level and is binary.

3. How is the process capability of a p, np, u, or c chart determined?
Process capability charts are determined by both the process variability …show more content…
Recognizing reliability enables a company to better comprehend how their products will perform under normal usage as well as extreme or unexpected situations.

6. Name and describe the three phases of the life history curve. Include factors that might cause failures in each cycle.
Early failure, chance failure, and wear-out.
Early failure: occurs immediately after the product or service has become available to the consumer.
Chance failure: failures occur randomly and by chance.
Wear out failure: happen from wear and tear and randomly occur.

7. Explain why a parallel system is more reliable than a system in series?
For a system in parallel, all the components in parallel must fail to have system failure. The reliability in a parallel system will be no less than the reliability of the most reliable component.

Chapter 15
8. Why do Six Sigma practitioners use failure modes and effects analysis?
Six Sigma uses FMEA because FMEA is a systematic approach to identify both the ways that a product, part, process, or service can fail and the effects of those failures.

9. Identify and describe the three types of FMEAs discussed in your textbook.
Process FMEAs identify the different ways that a process could fail and the effects of those
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