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Robert Wrembel and Christian Koncilia

"Data Warehouses and Olap: Concepts, Architectures and Solutions"

As this is the cornerstone
of our methodology, we will explain it in detail in the next section.
DSS-METRIQ.in.Detail
In this section we describe the phases of the methodology, giving details of the
processes within each phase. DSS-METRIQ can be adapted to the most used software
development models, like waterfall, spiral, or prototyping. As we explained in
the previous section, the methodology has five phases, each one grouping together
tasks that are conceptually related: scenario, information gathering, requirements
integration, data source selection, and document generation. Each phase consists
of a set of atomic steps. In the following sections we describe each phase in terms
of a set of initial requirements, a sequence of steps, a set of forms, and the output
of the phase (the information obtained). During the process, several documents and
forms will be manipulated, namely (a) master files, to be denoted with the prefix
MAS; (b) hierarchy documents (e.g., dimension hierarchies, user hierarchies), with
prefix HIE; (c) dictionaries (data and aggregation); (d) query forms, with prefix
QRY, containing the most common queries that the user will pose to the system;
(e) requirements forms, with prefix REQ; and (f) matrices for processing the information
obtained (with prefix MAT). Due to space limitations we will not show
all of these documents, but we will describe their content and give examples from
our case study.


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