The Nine Tasks Necessary to Assemble a Vacuum Cleaner Are

question 8

Essay

The nine tasks necessary to assemble a vacuum cleaner are listed below. The time to perform each task and the tasks that must immediately precede are also listed. 300 vacuums are needed per hour and 50 minutes per hour are productive.
$$\begin{array} { c c c } \text { Task } & \text { Thime in minutes) } & \text { Predecessars } \\\text { A } & .15 & \text { none } \\\text { B } & .06 & \text { A } \\\text { C } & .05 & \text { B } \\\text { D } & .12 & \text { B } \\\text { E } & .09 & \text { B } \\\text { F } & .16 & \text { B } \\\text { G } & .08 & \text { C,D,E } \\\text { H } & .06 & \text { G,F } \\\text { I } & .05 & \mathrm { H }\end{array}$$
a. Compute the cycle time per unit in minutes.
b. Compute the minimum number of workstations required.
c. Use the longest-task-time heuristic to balance the production line.
d. Compute the efficiency of the assembly line.

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Definitions:

Reality Principle

A psychoanalytic concept that represents the ability of the mind to assess the external world and act upon it accordingly, often in contrast with the pleasure principle.

Unconscious

Refers to the part of the mind that is inaccessible to the conscious mind but affects thoughts and behaviors.

Collective Unconscious

Concept in psychology, proposed by Carl Jung, referring to the part of the unconscious mind that is derived from ancestral memory and experience and is common to all humankind.

Conscious

The ability to be conscious of and deliberate on one's existence, sensations, cognitions, setting, and experiences lived.