Use Johnson's Rule to Determine the Optimal Sequencing for the Five

question 82

Essay

Use Johnson's rule to determine the optimal sequencing for the five jobs to be processed on two machines in a fixed order (Machine 1 before Machine 2). The processing times in hours are given in the table below.
a. What is the optimal sequence?
b. What is the total flow time for this sequence?
c. Which job is the first to be scheduled? Is it scheduled to be the first job or the last? Explain.

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Definitions:

Standard Direct Materials Price

The pre-determined cost per unit of raw materials expected to be incurred, utilized in budgeting and variance analysis.

Receiving Costs

Expenses associated with the reception of materials or goods from suppliers, including inspection, storage, and handling fees.

Freight Costs

Expenses associated with transporting goods from one location to another, which can include shipping, handling, and insurance fees.

Materials Quantity Variance

The difference between the actual quantity of materials used in production and the standard expected quantity, multiplied by the standard cost per unit.