Whether the third crew member will be economical.

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Answer 1

Question

Chapter 18, Problem 13P

a)

Summary Introduction

To determine: Whether the third crew member will be economical.

b.

Summary Introduction

To determine: Would the fourth member be justifiable.

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Trucks arrive at the loading dock of a wholesale grocer at the rate of 1.2 per hour. A single crewconsisting of two workers can load a truck in about 30 minutes. Crew members receive $10 perhour in wages and fringe benefits, and trucks and drivers reflect an hourly cost of $60. The manager is thinking of adding another member to the crew. The service rate would then be 2.4 trucksper hour. Assume rates are Poisson.a. Would the third crew member be economical?b. Would a fourth member be justifiable if the resulting service capacity were 2.6 trucks per hour?

In a waiting line situation, arrivals occur at a rate of 2 per minute, and the service times average 18 seconds. Assume the Poisson and exponential distributions. a. What is λ? b. What is μ? c. Find probability of no units in the system. d. Find average number of units in the system. e. Find average time in the waiting line. f. Find average time in the system. g. Find probability that there is one person waiting. h. Find probability an arrival will have to wait. Please show a corrct solution and answer. Thank you.

A server operates with 90 % utilization. Coefficient of variation of service process is 0.6. Coefficient of variation of arrival process is 0.8. Average processing time is 4 minutes. What is the average time a customer spends in the system using the single server queuing model ? Show all formulas used, calculations and results.

Answer 2

Question

Chapter 18, Problem 13P

a)

Summary Introduction

To determine: Whether the third crew member will be economical.

b.

Summary Introduction

To determine: Would the fourth member be justifiable.

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Answer 3

Question

Chapter 18, Problem 13P

a)

Summary Introduction

To determine: Whether the third crew member will be economical.

b.

Summary Introduction

To determine: Would the fourth member be justifiable.

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Answer 4

Question

Chapter 18, Problem 13P

a)

Summary Introduction

To determine: Whether the third crew member will be economical.

b.

Summary Introduction

To determine: Would the fourth member be justifiable.

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Answer 5

Chapter 18, Problem 13P

a)

Summary Introduction

To determine: Whether the third crew member will be economical.

b.

Summary Introduction

To determine: Would the fourth member be justifiable.

Answer 6

Chapter 18, Problem 13P

a)

Summary Introduction

To determine: Whether the third crew member will be economical.

Answer 7

Chapter 18, Problem 13P

a)

Summary Introduction

To determine: Whether the third crew member will be economical.

Answer 8

b.

Summary Introduction

To determine: Would the fourth member be justifiable.

Answer 9

b.

Summary Introduction

To determine: Would the fourth member be justifiable.

Answer 10

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Answer 11

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Answer 13

Ch. 18.1 - Prob. 1.1RQ Ch. 18.1 - Prob. 1.2RQ Ch. 18 - Prob. 1DRQ Ch. 18 - Why do waiting lines form even though a service...Ch. 18 - Prob. 3DRQ Ch. 18 - Prob. 4DRQ Ch. 18 - What approaches do supermarkets use to offset...Ch. 18 - Prob. 6DRQ Ch. 18 - Prob. 7DRQ Ch. 18 - Prob. 8DRQ

Whether the third crew member will be economical.

Solution Summary: The author explains that adding a third crew member would be economical. Driver-Truck Wait Cost: cL_q=

Concept explainers

To determine: Whether the third crew member will be economical.

To determine: Would the fourth member be justifiable.

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Chapter 18 Solutions