Service Capacity and Yield Management Quiz

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Questions and Answers

What does the arrival rate (λ) represent in a service process?

The time interval between arrivals
The average time taken to serve a customer
The number of arrivals within a specific time period (correct)
The total number of arrivals in an unspecified time period

Which distribution is typically used to model the number of arrivals in a given time interval?

Geometric distribution
Binomial distribution
Poisson distribution (correct)
Normal distribution

What is the inter-arrival time (1/λ) in the context of call centers?

The average duration of a call
The waiting time for the first call to arrive
The total duration of observation
The time between two successive calls (correct)

In the example of a carwash, if the arrival rate is 10 cars per hour, how long is the average inter-arrival time?

6 minutes (A) Signup and view all the answers

Why is the exponential distribution suitable for modeling inter-arrival times?

It reflects a memoryless and random process (D) Signup and view all the answers

If a home appliance repair service has an arrival rate of 4 maintenance requests per season, what is the corresponding inter-arrival time?

13 weeks (B) Signup and view all the answers

What type of information can the average inter-arrival time provide to service managers?

It aids in scheduling and resource allocation (B) Signup and view all the answers

In a call center with an arrival rate of 3 calls per minute, what is the expected time between two calls?

20 seconds (C) Signup and view all the answers

What is the formula for calculating system utilization in a queuing system?

$\frac{\lambda}{c \cdot \mu}$ (D) Signup and view all the answers

Which formula expresses the relationship between average arrival rate and average waiting time in queue?

Lq = λ * Wq (B) Signup and view all the answers

What does Ls represent in queuing theory?

Average number of customers in service (B) Signup and view all the answers

How is the average number of customers in the system calculated?

L = λ * W (D) Signup and view all the answers

Which of the following statements is true regarding the average service time Ws?

Ws affects Ls when multiplied by λ. (B) Signup and view all the answers

In a queuing system, what does Lq specifically indicate?

Average number of customers waiting in line. (C) Signup and view all the answers

How is the probability of exactly x customers in the system represented?

px (D) Signup and view all the answers

Which of the following would NOT be a factor in determining the average number of customers in service (Ls)?

Total operational costs of the service (A) Signup and view all the answers

What does the inter-arrival time in an exponential distribution typically represent in a supply chain context?

The time between arrivals of elements in a process (B) Signup and view all the answers

Which of the following intervals shows the highest frequency of occurrences based on the provided data?

(0.0, 0.7] (D) Signup and view all the answers

How does supply chain variability affect capacity adjustment tactics?

It necessitates frequent changes in capacity to match demand (B) Signup and view all the answers

In performance measurement, which of the following aspects is crucial for assessing the efficiency of supply chain operations?

Time taken for each delivery phase (B) Signup and view all the answers

What is a primary environmental impact of inefficient supply chain strategies?

Higher operational costs (D) Signup and view all the answers

Which demand and supply strategy primarily focuses on inventory control?

Lean strategy (C) Signup and view all the answers

Which option describes an adjustment tactic to increase supply chain capacity?

Investing in new technology or equipment (A) Signup and view all the answers

In the context of environmental impacts, how can supply chains minimize waste?

Implementing just-in-time delivery practices (A) Signup and view all the answers

Which approach focuses on aligning production with actual consumer demand?

Demand-driven planning (C) Signup and view all the answers

What role does performance measurement play in supply chain management?

It evaluates the effectiveness and efficiency of operations (D) Signup and view all the answers

Flashcards

Inter-Arrival Time

The time between successive events in a sequence.

Exponential Distribution

A probability distribution that describes the time between events in a Poisson process.

Poisson Process

A stochastic process in which events occur continuously and independently at a constant average rate.