SCENARIO 18-4
a Factory Supervisor Is Concerned That the Time

question 142

Short Answer

SCENARIO 18-4
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. $$\begin{array} {ccc} \underline {\text { Hour }} & \underline { \bar { X } } & \underline { R } \\1 & 18.4 & 25 \\2 & 16.9 & 27 \\3 & 23.0 & 30 \\4 & 21.2 & 23 \\5 & 21.0 & 24 \\6 & 24.0 & 25 \\7 & 19.3 & 12 \\8 & 15.8 & 14 \\9 & 20.0 & 13 \\10 & 23.0 & 11\end{array}$$ 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 18-4, what is the value of the $C _ { p }$ index?

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Definitions:

Cultural Change

Modifications in the shared beliefs, values, customs, behaviours, and artifacts among members of a society.

Species

The smallest working units in biological classificatory systems; reproductively isolated populations or groups of populations capable of interbreeding to produce fertile offspring.

Group Biological Changes

The evolutionary adaptations and alterations in biological characteristics occurring in populations over time.

Geological Time Period

A system of chronological dating that relates geological strata to time, used by geologists to describe the timing and relationships between events that have occurred during Earth's history.