Purpose – The problem of Wavelength Division Multiplexing (WDM) network planning for a given set of lightpath demands in a mesh topology network is to select lightpath routes and then allocate wavelength channels to the lightpaths. In WDM network planning, a scenario study is to find out the network performance under different lightpath demands and/or different network resource configurations. ...

In this paper, a multi-period and multi-resource operating room (OR) scheduling and rescheduling problem with elective and semi-elective (semi-urgent) patients is addressed. A scheduling-rescheduling framework based on the so-called rolling horizon approach is proposed to solve the problem. The core of the proposed framework is a novel proposed mixed-integer linear programming (MILP) model with...

This study seeks to identify and describe believable and probable scenarios about the future engagement of children in cyberspace from the perspective of futures studies. Children's and adolescents’ access to the Internet and network-based technologies is becoming increasingly prevalent. So explaining the key factors and uncertainties affecting this phenomenon requires a comprehensive insight i...

Multi-criteria decision analysis (MCDA) is well equipped to deal with conflicting, qualitative objectives when evaluating strategic options. Scenario planning provides a framework for confronting uncertainty, which MCDA lacks. Integration of these methods offers various advantages, yet its effective application in evaluating strategic options would benefit from scenarios that reflect a larger n...

This paper reports on our experience gained in deriving a reference model for Command, Control, Communication, Computers and Intelligence (C4I) architectures. The reference model addresses a dilemma faced by organisations today: choosing the right distributed object platform for domain-specific applications. In making such a choice, organisations face both technological and market uncertainty a...

We study a vehicular traffic scenario on Swiss roads in an emergency situation, calculating how sequentially roads block due to excessive traffic load until global collapse (gridlock) occurs and in this way displays the fragilities of the system. We used a database from Bundesamt für Raumentwicklung which contains length and maximum allowed speed of all roads in Switzerland. The present work co...

Scenario planning is one of the most widespread futures methodologies in use. A generic aim of scenario planning, as with many Futures Studies methodologies, is to broaden and deepen perceptual filters so as to find new and relevant meaning in 'weak signals from the future.' Integral Studies is an emerging field of meta-theory that attempts to meaningfully relate as many disciplines of human kn...

This paper presents a linear programming model in which a portfolio of projects is modelled as decision trees. It is also shown how scenario thinking can be combined with a capital budgeting model in order to permit uncertainty considerations. Furthermore, the programming of an option to wait and synergies of two projects is described.

Many mobile applications rely on the Global Positioning System (GPS) to provide position and location information. However, there are many problems with using GPS in urban environments due to the variable nature of GPS’s accuracy and availability. This paper introduces a simple tool that visualises the current state of GPS availability in real-time. This tool can be used for scenario planning f...

Radi analize oblika scenarija koji su značajni za istraživanje i planiranje prostora te načina na koji se metoda scenarija upotrebljava u tom kontekstu na pojedinim prostornim razinama proveden je opsežan pregled literature vezane uz tipologije i primjere upotrebe metode scenarija. Prema prostornom i vremenskom okviru, svrsi i postupku izrade scenarija te izrađenim scenarijima, pobliže je anali...