Question

Problem 15-27 (Algorithmic) Gubser Welding, Inc., operates a welding service for construction and automotive repair jobs....

Problem 15-27 (Algorithmic)

Gubser Welding, Inc., operates a welding service for construction and automotive repair jobs. Assume that the arrival of jobs at the company's office can be described by a Poisson probability distribution with an arrival rate of one job per 8-hour day. The time required to complete the jobs follows a normal probability distribution, with a mean time of 5.5 hours and a standard deviation of 2 hours. Answer the following questions, assuming that Gubser uses one welder to complete all jobs:

1. What is the mean arrival rate in jobs per hour? If required, round your answer to two decimal places.

________ per hour
2. What is the mean service rate in jobs per hour? If required, round your answer to four decimal places.

_______ per hour
3. What is the average number of jobs waiting for service? If required, round your answer to three decimal places.

_________
4. What is the average time a job waits before the welder can begin working on it? If required, round your answer to one decimal place.

_____ hours
5. What is the average number of hours between when a job is received and when it is completed? If required, round your answer to one decimal place.

________ hours
6. What percentage of the time is Gubser's welder busy?

________% of the time the welder is busy.

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