The upstream activities of software development projects are often viewed as both the most important, the least understood, and hence the most problematic. This is particularly noticeable in terms of satisfying customer requirements. Business process modelling is one solution that is being...

Estimation of the generalization ability of a predictive model is an important issue, as it indicates expected performance on previously unseen data and is also used for model selection. Currently used generalization error estimation procedures like cross–validation (CV) or bootstrap are...

In response to the so-called "software crisis', software prototyping has been widely used as a technique in various stage of systems development since the late 70's, and, with the growing sophistication of 4GLs tools and environments, it has becoming a popular alternative to conventional...

Business process modelling is an area of work that is increasingly used in conjunction with software development. For example, many development methods note the importance of strategic or business modelling, typically as a prerequisite to analysis. In addition, Systems Engineering for Business...

In research of time series forecasting, a lot of uncertainty is still related to the task of selecting an appropriate forecasting method for a problem. It is not only the individual algorithms that are available in great quantities; combination approaches have been equally popular in the last...

Electronic marketplaces (e-marketplaces) have a profound influence on the way in which organizations manage their supply chains. Proponents of the e-marketplace concept suggest that web-based trading systems, such as World Wide Retail Exchange (WWRE) and GlobalNetXchange (GNX), would enable...

Globalization and the Internet are creating a new form of network organization characterized by networks of cooperating and competing firms. The concept of network organization advocates flexible and open organizational structures that would improve coordination among organizational units and...

Drawing on recently published data, this report examines some of the trends in travel e-commerce. Using a case study approach, the author examines in detail some of the e-business models impacting on the travel industry both in the Business-to-Business (B2B) and Business-to-Consumer (B2C)...

The i* framework has been available in research communities for more than ten years, but it has not been applied widely in industrial requirements projects. This is despite undoubted strengths, which include a simple but formal and stable semantics, a graphical modeling notation that is simple...

Different ways of detecting structural changes in email-based social networks are presented in the paper. A social network chosen for experiments was created on the basis of the Wroclaw University of Technology email server logs covering the period of 20 months. Structural parameters like degree...