Instruction 18-7
a Factory Supervisor Is Concerned That the Time

question 26

Multiple Choice

Instruction 18-7
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 five 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.
$$\begin{array} { | l | l | l | } \hline \text { Hour } & \underline { \underline { X } } & \underline { R } \\\hline 1 & 18.4 & 25 \\\hline 2 & 16.9 & 27 \\\hline 3 & 23.0 & 30 \\\hline 4 & 21.2 & 23 \\\hline 5 & 21.0 & 24 \\\hline 6 & 24.0 & 25 \\\hline 7 & 19.3 & 12 \\\hline 8 & 15.8 & 14 \\\hline 9 & 20.0 & 13 \\\hline 10 & 23.0 & 11 \\\hline\end{array}$$
-Referring to Instruction 18-7,suppose the supervisor constructs an R chart to see if the variability in collection times is in control.This R chart is characterised by which of the following?

• A) Decreasing trend
• B) Increasing trend
• C) In control
• D) Individual outliers

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Definitions:

Duty of Performance

The duty of performance is an obligation in a contract that requires a party to fulfill the terms as agreed.

Reasonable Skill

The level of competence that a professional is expected to perform in a specific task, based on common standards in the field.

Legal Liability

The responsibility to bear the consequences under the law, often involving compensation for harm or damage.

Office Equipment

Machines and devices designed for use in an office environment, such as computers, printers, and telephones.