This paper presents an extension of a framework for synthesizing a composition of services, named Roman Model, such that it is able to model the best service composition synthesis problem. In such extension, which we call the Weighted Roman Model, the services are modeled as Weighted Transition Systems so that one can capture the cost of operations executed by a service. Within this setting, we...

Time-cost trade off problem is one of the highly important issues in project accomplishment and has been ever taken into consideration by project managers. Time and cost as two critical objectives of construction project management, are not independent but intricately related. Time-cost optimization may be defined as a process to identify suitable construction activities for speeding up, and fo...

This paper draws upon the results of a qualitative study on the procurement and adoption of open source software by public sector organizations spanning Europe, Brazil and the USA. The premise of this work was to understand the role ‘cost’ or total cost of ownership of software plays in government procurement decisions. We found, however, that this was more a rhetoric to gain acceptance for ope...

Technical support contributes 17% of the total cost of ownership of today’s desktop PCs [25]. An important element of technical support is troubleshooting misconfigured applications. Misconfiguration troubleshooting is particularly challenging, because configuration information is shared and altered by multiple applications. In this paper, we present a novel troubleshooting system: PeerPressure...

Cloud computing is an evolution of computing technology and reflects a shift in the way it is delivered to businesses and individuals. Enterprises can significantly lower their cost of ownership, reduce time to value and faster adapt to changing needs in a globalized economy. Despite research and practice predict productivity increases and cost savings when migrating to the cloud one question r...

We present a quantitative approach for IT portfolio management. This is an approach that CMM level 1 organizations can use to obtain a corporate wide impression of the state of their total IT portfolio, how IT costs spent today project into the budgets of tomorrow, how to assess important risks residing in an IT portfolio, and to explore what-if scenarios for future IT investments. Our quantita...

Software as a Service (SaaS) is a promising approach for Small and Medium Enterprises (SMEs) firms, in particular those that are focused on growing fast and leveraging new technology, due to the potential benefits arising from its inherent scalability, reduced total cost of ownership and the ease of access to global innovations. This paper proposes a dynamic perspective on IS capabilities to un...

Our focus in this paper is to better understand how and why various governments in Europe are adopting, using and cocreating open source software. Our study involved in-depth interviews of key stakeholders from a number of European government agencies. The main findings lead us to understand and organize our analysis under four broad categories of criteria that motivated open source adoption. T...

Aspect-oriented advice increases the number of places one must consider during reasoning, since advice may affect all method calls and field accesses. MAO, a new variant of AspectJ, demonstrates how to simplify reasoning by allowing programmers, if they choose, to declare limits on the control and heap effects of advice. Heap effects, such as assignment to object fields, are specified using con...