A firm is attempting to estimate the reserves for doubtful accounts. The probabilities of these doubtful accounts follow a transition process over time. They evolve from their starting value to a changed value. As such, the most effective technique to analyze the problem is
Answer(s): A
A Markov chain is a series of events in which the probability of an event depends on the immediately preceding event. An example is the game of blackjack in which the probability of certain cards being dealt is dependent upon what cards have already been dealt. In the analysis of bad debts, preceding events, such as collections, credit policy changes, and write offs, affect the probabilities of future losses.
A company has several departments that conduct technical studies and prepare reports for clients. Recently, there have been long delays in having these reports copied at the company's centralized copy center because of the dramatic increase in business. !Management is considering decentralizing copy services to reduce the turnaround and provide clients with timely reports. An appropriate technique for minimizing turnaround time and the cost of providing copy services is
Two basic costs are involved in queuing waiting-line) models: I) the cost of providing service including facility costs and operating costs), and 2) the cost of idle resources waiting in line. The latter II may be a direct cost if paid employees are waiting, or an opportunity cost in the case of waiting customers. The objective of queuing theory is to minimize the total cost of the system, including both service and waiting costs, for a given rate of arrivals. This minimization occurs at the point at which cost of waiting is balanced by the cost of providing service. This company wishes to reduce the total of waiting costs turnaround time) and the cost of copy services.
Queuing models are concerned with balancing the cost of waiting in the queue with the
Queuing waiting-line) models minimize, for a given rate of arrivals, the sum of 1) the cost of providing service including facility costs and operating costs) and 2) the cost of idle resources waiting in line. The latter may be a direct cost, if paid employees are waiting, or an opportunity cost in the case of waiting customers. This minimization occurs at the point where the cost of waiting is balanced by the cost of providing service.
The operating condition that car-or-mot be identified by using a queuing model is the
Answer(s): C
Queuing models determine the operating characteristics of a waiting line: the probability that no units are in the system, the average units in the line, the average units in the system, the average time a unit waits, the average time a unit is in the system, the probability that a unit must wait, and the probability of a given number of units in the system. However, the actual time spent in the queue cannot be determined from the model.
A bank has changed from a system in which lines are formed in front of each teller - to a one- line, multiple-server system. When a teller is free, the person at the head of the line goes to that teller. Implementing the new system will
Answer(s): B
When all customers must wait in a single queue, a decrease in waiting time is possible given multiple servers. An added effect is to increase customer satisfaction.
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