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Showing papers on "Service system published in 1968"


Journal ArticleDOI
TL;DR: It is supposed that customers of type 1 and type 2 arrive at a service system in accordance with a Poisson process and the service times have a general distribution.
Abstract: It is supposed that customers of type 1 and type 2 arrive at a service system in accordance with a Poisson process. There are two counters in the system. Customers of type 1 receive service at coun...

104 citations


Journal ArticleDOI
TL;DR: This paper calculates several characteristic quantities of a queuing system in which customers cannot be in continuous contact with the server, but must call in to request service, assuming a general service-time distribution and different exponential distributions for the times between arrivals of first requests and repeat requests.
Abstract: The object of this paper is to analyze a model of a queuing system in which customers cannot be in continuous contact with the server, but must call in to request service: If the server is free, then the next request to arrive is served immediately; if the server is occupied, however, the unsatisfied customer must break contact and later re-initiate his request. Thus, repeat requests for service from the pool of unsatisfied customers are superimposed on the normal stream of arrivals of first attempts. This system is characteristic of situations in which there is a single operator or source of information that must be called and busy signals are not held. This paper calculates several characteristic quantities of such systems, assuming a general service-time distribution and different exponential distributions for the times between arrivals of first requests and repeat requests.

100 citations






Book
01 Jan 1968

2 citations


DOI
02 Dec 1968
TL;DR: In this article, a simulation of the taxi service system of the University of California Lawrence Radiation Laboratory (UCLRL) was undertaken to investigate (without disrupting normal operations) ways of modifying the operations of the existing system which would result in substantially better service at no great additional cost.
Abstract: A simulation of the taxi service system of the University of California Lawrence Radiation Laboratory (UCLRL) was undertaken to investigate (without disrupting normal operations) ways of modifying the operations of the existing system which would result in substantially better service at no great additional cost. The successful achievement of the above objective resulted from the recognition of the close relationship between job shop scheduling and the decision-making problem of UCLRL's taxi service system; and the applicability, therefore, of some of the rules and heuristics employed in job-shop scheduling. GPSS III was used to model the proposed system, rules and heuristics because it readily permitted the formulating of complex models. Although GPSS flexibility allowed accurate modeling of the majority of the system, GPSS approximations were still necessary to represent the distribution of arrivals. To defend the independent Poisson distribution a statistical inference study was used to establish that the model's distribution was robust with respect to the effects of the actual distribution of arrivals.A brief description of UCLRL is necessary prior to any further discussion of how the simulation study was particularly applied.

1 citations


Journal Article

1 citations