Providing Business Requirements in VS .NET

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be added at this time The remaining business requirements can be prioritized again, to determine what is to be included in subsequent projects to expand the data warehouse This same approach can be applied to de ning the requirements for an entire data warehouse program or for a single data warehouse project The only difference would be the breadth of the audience providing the requirements This approach helps organizations to look beyond the immediate need for a speci c report or type of data Some organizations balk at taking the time to gather and document business requirements in this manner, preferring to jump directly to de ning report layouts and screens Without the proper business context and rationale behind the reports, however, the long-term value of the data warehouse can be limited Focusing only on reports causes the project team to work on delivering only the data needed to create those reports It is easy to overlook other data that is stored with the speci c data needed for the reports Often this other data could be included with minimal added effort or cost Because the business environment changes constantly, the types of reports and analyses must also change The requirements gathering process detailed here can help organizations to be prepared to adapt to these changes
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The project charter and scope help to determine who should be interviewed Representatives from the groups that are involved with or support the business goals should be included More details about how to determine who will be interviewed are included later in this chapter It is important to remember that while the charter and scope help determine the people to interview, they should not limit the topics of discussion The process of gathering requirements may show that the most important area needing support by the data warehouse is not in the current project scope The last part of this chapter provides ideas for what to do in those situations
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Who Gathers the Requirements
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The work to gather these business requirements is typically done by a business analyst, business systems analyst, and/or the data modeler The people lling these roles form the core group that is responsible for conducting the interviews, analysis, and interpretation of the input and documentation of these ndings Because the requirements gathering process is focused on the business and does not address technology, it may be tempting to perform this task strictly as a business activity However, because the requirements are used to drive the design, it is important to include more technical data warehouse team representatives
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Part II
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The Business Side of Data Warehousing
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The real art of data warehousing is melding together the business vision with the reality of the data you actually have This requires the systems representatives to be part of the requirements gathering process too This gives them the background and understanding of the business they need in order to make sound decisions during the design stage It does not matter who owns the budget for this work a team of people who represent both the business and systems perspectives must complete the work Again, partnership is key here Now with a basic overview of what kinds of requirements are needed, it is time get into more detail The next section describes the rst three levels of requirements and is intended to help those who are expected to provide business requirements to the data warehouse team
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This section provides more details about the business requirements that need to be collected It will help anyone who is providing input to understand what the project team is looking for While these are divided here to aid in understanding, often the requirements are provided all together, interwoven throughout an interview session
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