Telecommunications will face a tremendous challenge in the coming years to be able to design, architect, and manage networks in such a rapidly evolving industry. Develop- ment and application of heuristic methods will be fundamental to our ability to meet this challenge. Robert Doverspike, AT&T Labs Research Iraj Saniee, Bell-Labs, Lucent Technologies June PI, 1999 3 " Journal of Heuristics, 6, 9-20 (2000) *"'Il (c) 2000 Kluwer Academic Publishers Telecommunications Network Case Study: Selecting a Data Network Architecture ERIC ROSENBERG AT&T Labs, Middletown, NJ 07748, USA email: eric. rosenberg@att. com Abstract This paper documents a model that was pivotal in deciding which of two architectures should be selected for a frame relay data communications network. The choices are either to continue using the current architecture, or to make a large incremental investment in new equipment which reduces the number of high speed inter-office trunks required to interconnect the switches. The analysis requires optimizing the mix of two types of customer port cards to determine the maximum customer port capacity of a switch. Simple approximations are used to estimate the number of inter-office trunks and trunk cards required. Based in large part on the costs computed by this model, an executive level decision was made to move to the new architecture. Key Words: data communications, network architecture, network design, frame relay, virtual circuits, economic analysis 1. Introduction To design a data communications network, it is necessary to consider a variety of factors.
In two volumes, Planning Production and Inventories in the Extended Enterprise: A State of the Art Handbook examines production planning across the extended enterprise against a backdrop of important gaps between theory and practice. The early chapters describe the multifaceted nature of production planning problems and reveal many of the core complexities. The middle chapters describe recent research on theoretical techniques to manage these complexities. Accounts of production planning system currently in use in various industries are included in the later chapters. Throughout the two volumes there are suggestions on promising directions for future work focused on closing the gaps.
The family vacation has been portrayed in many ways. From National Lampoon's "Vacation" showing the trials and tribulations of the Griswold family trying to get to "Wally World" to "The Great Outdoors" with John Candy and his family renting out a cabin in the woods only to encounter a meddling bear. Family vacations in the media seem to be one thing going wrong after another. But in real life, the family vacation is a time to bond together as a family unit and enjoy newfound times of closeness while exploring new adventures and locales. The memories you can make on these vacations will stay with you for years and give your children special moments they'll treasure forever. You can choose to drive cross country and see the quirky roadside attractions such as the largest ball of yarn or the corn museum. Some don't look at this as a true vacation. After all, being stuck in a car for the majority of the trip can breed some real family strife! You could also book a family cruise or fly to Mexico to spend time at a resort, but this can get pricey, and with all the activities they have for children, some parents fear the bonding they were looking forward to won't happen. For the family on a budget, the notion of a memorable and fun-filled vacation may seem out of reach. That's simply not true, however. There are many, many ways you can have a terrific family vacation while on a budget. You don't have to sacrifice fun because of lack of money. There are all kinds of vacations that can be had within almost every budget. While traveling is good for the economy and for your soul, it can be hard on your wallet. In fact, AAA estimates that a family of four should budget at least $244 per day for meals, lodging and automobile travel costs. And that figure doesn't include the staple of family vacations' entertainment. As usual, the best way to keep the costs down is to plan ahead and make informed decisions. But how do you start? You start with family input, a survey of your resources, and a well-thought out plan. We'll not only show you how to do that easily, but we'll also give you all kinds of ideas for family vacations and ways that you can make them affordable and fun! Always dreamed of going to Disney World? You can! Think the Caribbean is out of reach? It's not! We've compiled the advice and suggestions from many vacation experts and added some of our own experiences as well to give you this comprehensive guide to taking a family vacation on a budget! We'll show you different ways to save money on airfare, hotels, transportation, and eating. We'll also give you some great specific ideas for family vacations that won't break the bank along with some suggestions to help you save money and time in general while on your family getaway. Whether it's a summer trip, spring break jaunt, or wintering in the tropics, you'll be able to plan your dream vacation without breaking the bank. You'll get maximum fun without sacrificing every penny of your hard earned dollars and you may even come back with a little extra to save for that next vacation! What are you waiting for? Read on and enjoy your ebook "VACATION PLANNING (ON A BUDGET)!"
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