M/m/1 queuing theory Help with homework

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SUMMARY

The discussion focuses on solving an M/M/1 queuing theory problem involving a single employee serving customers. Customers arrive at a rate of 4 per hour, while the service rate is 5 per hour. The probability of exactly 4 customers arriving in one hour is calculated using the Poisson distribution, yielding a result of approximately 0.183. Additionally, the average time per customer is determined to be 12 minutes, and the probability that the cashier is idle is derived from the system's utilization rate.

PREREQUISITES
  • Understanding of M/M/1 queuing theory
  • Familiarity with Poisson distributions
  • Knowledge of exponential service time distributions
  • Basic probability concepts
NEXT STEPS
  • Study the derivation of the Poisson distribution for arrival rates
  • Learn how to calculate idle probabilities in queuing systems
  • Explore the implications of service rate on customer wait times
  • Investigate other queuing models such as M/M/c and M/G/1
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Students studying operations research, analysts working with queuing systems, and professionals in logistics or service management seeking to optimize customer service efficiency.

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Homework Statement


Single employee. Customers arrive at a rate of 4 pr hr. Customers are served at an average rate of 5 per hour. Assume that arrival are random and independent and services times are exponentially distributed

What is the prob that exact 4 people arrive during a given one hour period
what is the average time per customer?
What is the prob that the cashier is idle?


Homework Equations


m/m/1




The Attempt at a Solution


po (4) 0 e-4 =e-4=0.183
 
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joscieja said:

Homework Statement


Single employee. Customers arrive at a rate of 4 pr hr. Customers are served at an average rate of 5 per hour. Assume that arrival are random and independent and services times are exponentially distributed

What is the prob that exact 4 people arrive during a given one hour period
what is the average time per customer?
What is the prob that the cashier is idle?


Homework Equations


m/m/1




The Attempt at a Solution


po (4) 0 e-4 =e-4=0.183
I can't tell what this is supposed to mean. For this problem, I'm assuming you need to use Poisson distributions for the customer arrivals and serving times. Since four customers arrive per hour, then a customer arrives every 15 minutes. Since the system can serve 5 per hour, it takes 12 minutes, on average, to serve a customer.
 

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