A Facility Is Trying to Set Up an Assembly Line

question 60

Essay

A facility is trying to set up an assembly line, and has identified the various tasks, and their relationship to each other, as shown in the following table. They wish to produce 600 units per day, working two 8-hour shifts.
$$\begin{array} { | c | c | c | } \hline \text { Task } & \text { Preceding Task } & \begin{array} { c } \text { Time to perform } \\\text { (sec.) }\end{array} \\\hline \text { A } & - - & 20 \\\hline \text { B } & - - & 30 \\\hline \text { C } & - - & 25 \\\hline \text { D } & - - & 10 \\\hline \text { E } & \text { A } & 55 \\\hline \text { F } & \text { D, B, C } & 30 \\\hline \text { G } & \text { E } & 25 \\\hline \text { H } & \text { F, G } & 40 \\\hline\end{array}$$
a. Draw a network diagram of precedence relationships.
b. Compute the required cycle time per unit in seconds.
c. Compute the minimum number of workstations required to produce 600 units per day.
d. Balance this line using longest processing time.
e. What is the efficiency of the line obtained in part d?

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Definitions:

Class Voting

The pattern of voting behavior where individuals' choices at the polls are strongly influenced by their social class.

Decreased

The act or process of becoming smaller in size, quantity, or intensity; the opposite of increased.

Fluctuated

Varied or changed over time within a range or scale, often in an unpredictable manner.

Liberal Democracy

A form of government where free and fair elections occur and there is protection of individual rights and freedoms.