SCENARIO 15-4
a Factory Supervisor Is Concerned That the Time

question 239

Multiple Choice

SCENARIO 15-4
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.
$$\begin{array} { cc c } \underline { \text { Hour } } & \underline { X } & \underline { R } \\1 & 18.4 & 25 \\2 & 16.9 & 27 \\3& 23.0 & 30 \\4 & 21.2 & 23 \\5 & 21.0 & 24 \\6 & 24.0 & 25 \\7&19.3&12\\8 & 15.8 & 14 \\9 & 20.0 & 13 \\10 & 23.0 & 11\end{array}$$ She also decides that lower and upper specification limit for the critical-to-quality variable should be
10 and 30 seconds, respectively.
-Referring to SCENARIO 15-4, suppose the supervisor constructs an R chart to see if the variability in collection times is in-control.What are the lower and upper control limits for this R chart?

• A)- 2.33, 43.13
• B)- 2.28, 42.28
• C)0, 42.28
• D)0, 43.13

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Definitions:

Younger Workers

Individuals in the workforce who are relatively young, often bringing fresh perspectives but facing unique challenges.

Absenteeism

refers to the habitual non-presence of an employee or student, which can negatively impact productivity and morale in a workplace or educational setting.

Technological Skills

The abilities and knowledge needed to effectively use technical tools, digital devices, and other technology-related systems.

Motivation Depletion

The reduction or exhaustion of an individual's motivation, making it harder to engage in or initiate actions towards goals.