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Purpose -The main purpose of this paper is to improve a web content management system (WCMS) product line for future implementations by identifying software commonalities in WCMS-based web applications. WCMS plays a central role in modern web application development: most large public and internal web sites are based on a WCMS foundation. If we can improve the implementation process, the effectiveness and efficiency of web application development will increase significantly. Design/methodology/approach -This research identifies reusable solutions from existing WCMS implementations using problem diagrams and structured goal modeling. From configurations were matched with atomic e-business models by linking them to the strategic competencies through bottom-up goal modeling. A designed method was constructed on how requirements can be elicited for WCMS implementations using goal modeling and problem frames. Findings -The resulting method provides insight in relevant e-business models and their relation to software product lines. Moreover, the approach is applied in a WCMS study which demonstrates its applicability. Practical implications -The practical implications of this research is twofold: WCMS developers now have a method to improve their product line based on e-business models; and requirements engineers implementing WCMS can use this model to apply reusable software and prioritize requirements. Both will potentially have a large impact on the effectiveness of implementations since most web applications are developed with WCMS. Originality/value -The paper presents a novel approach for efficient and effective identification of software commonalities. This research is part of the web engineering method that focuses on development of web applications based on WCMSs.

In this article, an experiment was conducted to measure the effect of framing a high definition television (HDTV) clip. One group of participants was told they were watching a brand new HDTV clip, while the other group was told they were watching a digital DVD clip. Both groups were in fact watching the same (low) quality DVD clip. After watching this clip, the beliefs of the participants and their viewing experiences were measured via a questionnaire. The people framed to watch the HDTV clip were found to have a significantly more positive viewing experience. This shows that participants were unable to discriminate properly between digital and high definition signals but were influenced by the frame set for them. This effect has been shown in many different situations, and has now been established when watching HD-quality television as well. The results still indicate that the HDTV-frame is already associated with a high-quality viewing experience, which may influence the selling strategy and/or speed in the adoption of this technology. In the following discussion we will pay attention to the different ways in which HDTV can be framed in the media.

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