Thomas Widjaja

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This article summarizes the results of 25 expert interviews, regarding the value potential and challenges of the Service-oriented Architecture (SoA) paradigm for users and software vendors. On the user side, the SoA value potential most often mentioned by experts was agility, followed by process optimization. Cost reduction, through a more efficient(More)
The wealth of social information presented on Facebook is astounding. While these affordances allow users to keep up-to-date, they also produce a basis for social comparison and envy on an unprecedented scale. Even though envy may endanger users' life satisfaction and lead to platform avoidance, no study exists uncovering this dynamics. To close this gap,(More)
Measurability is the essential basis for management. Although the management of complexity is a central task of CIOs and IT-architects, literature has not proposed a concrete measure to quantify complexity in enterprise architectures so far. Against this background the contribution of this paper is a) the introduction of a system theoretic conceptualization(More)
The term "heterogeneity" is widely used to describe complex IT systems and can refer to various characteristics, such as vendor, technology, or semantic diversity of the systems components. However, no commonly accepted definition or quantification of this " diversity " can be found in IS literature. In this article we transfer well-studied measures from(More)
Despite increasing interest in IT outsourcing (ITO) and the various benefits it promises, Cloud Computing (CC) as the currently most prevalent ITO paradigm still entails serious IT security risks. Little attention has been paid so far to fully and unambiguously capture the complex nature of IT security risks and how to measure it. Against this backdrop, we(More)
Despite the widely recognized prevalence of IT security risk concerns in users' Cloud adoption, little is understood about how Cloud providers assess IT security risks and in what ways potential disagreements among providers and potential users on the IT security risks of Cloud services affect users' adoption intentions. Drawing on perceptual congruence(More)
The Service-Oriented Architecture (SOA) paradigm promises to facilitate the integration of software services provided by different vendors and thus enables users to benefit from Best-of-Breed solutions. In order to support software architects we present the Multilayer Standardization Problem (MSP) to analyze the trade-off between possibly enhanced utility(More)