A Print Shop Has Four Jobs That Have to Be

question 4

Essay

A print shop has four jobs that have to be processed through their only five-color press.They usually use the first-come first-served method of scheduling jobs.However, the customers are waiting in the lobby for these jobs so the shop wants to minimize the average waiting time.They are going to use the shortest processing time rule to do so.Processing times for each job are as follows (assume this is the arrival order): Job A, 30 minutes; Job B, 17 minutes; Job C, 12 minutes; Job D, 39 minutes.
a.In what order should the four jobs be done using the shortest processing time rule?
b.What is the average waiting (flow) time for all jobs using the shortest processing time rule?
c.What is the averaging waiting (flow) time using their usual first-come first-served rule?

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Definitions:

Memo Writing

The process of composing a written communication, often used within organizations to inform, instruct, or document information for internal purposes.

Grounded Theory

A research methodology that involves constructing theories through the systematic gathering and analysis of data.

Theoretical Sampling

A method in qualitative research where data collection is directed by concepts derived from evolving theory until no new insights are obtained.

Experimental Methods

A research methodology that involves manipulating one variable to determine if it causes a change in another variable, often used to establish cause-and-effect relationships.