In this paper, we consider a specific variant of the field service routing problem. It consists in determining vehicle routes in a single period to serve two types of customers: mandatory and optional. Mandatory customers have to be served within a specified time window whereas optional customers may be served (or not) within the planning horizon. For more realism, we assume that service as wel...

This paper is motivated by an open problem posed by Senthil Kumar and Arumuganathan in their paper published in June 2009 [10]. We study the steady state behavior of an M/G/1 retrial queue with non-persistent customers, two phases of heterogeneous service and different vacation policies. We consider the case where the customer after obtaining the first essential service may or may not opt for a...

We consider a discrete-time G e o / 1 ∞ system in which customer that finishes its first essential service may opt to abandon the system, receive second optional or go at head of queue order another service. study Markov chain underlying considered queueing and ergodicity condition. Using generating function approach distribution number customers as well their respective means are given. The bu...

Architecture Concrete realization: CORBA Elements Concrete realization: Java Elements Message Transport Agent Directory ACL Service Directory Message Transport Agent Directory ACL Service Directory 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 Figure 1: Abstract Architecture Mapped to Various Concrete Realizations The abstract architecture also describes optional eleme...

as one of the motivational theories which define both values and attitudes beyond personal as well as organizational benefits, public service motivation (psm) model aims to underscore the appreciation of individuals with regard to public interests. if psm pattern being optional is synchronized with civic-organizational behavior, its effectiveness is manifested in improving service quality. the ...

The Australian Government intends to mandate filtering at the Internet Service Provider (ISP) level to provide a “clean feed” to all subscribers. It claims the current arrangement that includes optional filtering at the Personal Computer (PC) level has failed to protect children from unsuitable Internet content. This paper addresses three key questions that are relevant to IT professionals ever...

Architecture Concrete realization: CORBA Elements Concrete realization: Java Elements Message Transport Agent Directory ACL Service Directory Message Transport Agent Directory ACL Service Directory 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 Figure 1: Abstract Architecture Mapped to Various Concrete Realizations The abstract architecture also describes optional eleme...

The imprecise computation model is an extension of the traditional real-time processing model. In this model, each imprecise task is logically divided into two portions: a mandatory portion and an optional portion. Since the optional portions of imprecise tasks can be traded for their deadlines and/or the required quality of service (QoS), the resulting quality of executing tasks in this model ...