Atenção: As questões de números 57 a 60 referem-se ao texto abaixo.
The literature is full of testimonials for data warehousing. There is almost nothing about the arguments [PREPOSITION] data warehousing. In this paper I attempt to slightly fill that void by shedding light on business and cultural factors that greatly lessen the value of data warehousing for certain organizations. By the way, when I refer to data warehousing, I refer to both centralized data warehousing systems and data marts.
Some of the reasons data warehousing efforts may not be appropriate for certain organizations are:
Data warehousing systems, for the most part, store historical data that have been generated in internal transaction processing systems. This is a small part of the universe of data available to manage a business. Sometimes this part has limited value.
That is, sometimes the business end user community does not have a strong interest in old transaction processing system data beyond what are available in basic reports generated in transaction processing systems. This lack of interest often stems from the fact that the markets in which a business competes are in great flux or that the internal structure of the organization is in perpetual transition. If these conditions exist, there may not be a solid historical base to compare current performance with. Also, sometimes there is a lack of interest in looking at this data in any in-depth way because a business is so simple that a data warehouse is overkill.
Data warehousing systems can complicate business processes significantly.
[CONJUNCTION] the interest in business process reengineering seems to have waned, some of the appreciation of how complicated processes can slowly strangle a business has remained. Data warehousing, if unchecked, can foster the "institutionalization" of easily created reports whose reason for being quickly is forgotten while people still toil to process these reports. If your organization does not know how to throw out processes (pardon my calling producing, distributing, and reading a report a "process"), data warehousing can quickly add clutter to the business environment.
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Despite the speed of the data warehousing development effort, it takes time for an organization to figure how it can change its business practices to get a substantial return on its data warehousing investment. I speculate that rigorous analysis of the return on most of the major data warehousing implementers' investments would find a much longer average payback period that you would surmise from reading the trade press.
