TABLE 17-4 A Factory Supervisor Is Concerned That the Time It Takes

question 99

Multiple Choice

TABLE 17-4
A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds) is too erratic and adversely affects expected profits. The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours. The sample mean and range for each hour are listed below.

She also decides that lower and upper specification limit for the critical-to-quality variable should be 10 and 30 seconds, respectively.
-Referring to Table 17-4, suppose the sample mean and range data were based on 6 observations per hour instead of 5. How would this change affect the lower and upper control limits of an R chart?

• A) LCL would increase; UCL would decrease.
• B) LCL would remain the same; UCL would decrease.
• C) Both LCL and UCL would remain the same.
• D) LCL would decrease; UCL would increase.

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Definitions:

Direct Foreign Investment

Investment made by a company or entity based in one country, into a company or entity based in another country.

State Industries

Industries that are owned, controlled, or heavily regulated by government entities to provide public services or goods.

Central Banks

National institutions tasked with overseeing a country's currency, money supply, and interest rates, and supervising its banking system.

Developing Countries

Nations with relatively lower levels of industrialization, lower standards of living, and often a lower Human Development Index (HDI) compared to developed countries.