A Facility Is Trying to Set Up an Assembly Line

question 68

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:

Tax Rate

The percentage at which an individual or corporation is taxed.

Lease Asset

An asset that is acquired under a lease agreement wherein the lessee has the right to use the asset for a specified period.

Lease Liability

An obligation representing future lease payments for the use of assets, recognized on the balance sheet by lessees under new accounting standards.

Capital Lease

A lease agreement that grants a lessee essentially all the risks and rewards of ownership, so it's accounted for on the balance sheet as an asset and liability.