Thus, requirements evolution is supported in this way (meaning that
any change that occurs during the process can be reflected and documented in the
forms). Matrices are equipped with a certain intelligence that allows weighting the
information contained in the forms, in order to qualify and prioritize requirements.
A data dictionary is a catalogue of data that contains names, aliases, and detailed
descriptions of the atomic elements that compose the user queries, data sources,
and the data warehouse. Its purpose is the definition of a common meaning for each
one of these elements, allowing expression of user requirements on the basis of a
common terminology. It can be updated throughout the process. The aggregations
dictionary is a catalogue containing information on dimensions, dimension levels,
and aggregations (Chaudhuri & Dayal, 1997).
Data.Quality.Requirements
DSS-METRIQ is a quality-based and quality-led methodology. Its main goal is
to integrate functional requirements and data quality. As such, the data quality dimensions
to be used must be defined. We adapted and integrated the main existing
proposals commented previously, considering not only the relevance of each quality
dimension, but also the possibility of quantifying it. Based on this, we will work
Data Quality-Based Requirements Elicitation for Decision Support Systems 6
Copyright ?© 2007, Idea Group Inc.
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