2 dw requeriments
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Transcript of 2 dw requeriments
DATA WAREHOUSING Requirements
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Technology is important; business value is mandatory.
Define enterprise-level business requirements
Prioritize business requirements Plan the project Define project-level business requirements
What is the problem area? How does the business you approach it? Is the data available? Who will use the results? Who cares?
Give me the annual revenue of all my product lines divided over all the sales regions over the last 3 years
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Give me the top 10 of most profitable products this year
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Give me the top 10 of most sold products of last year
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Give me the top 10 of most profitable customers
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Compare the YTD revenue with the one in the same period last year and the target
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Collecting the Requirements
Interviews ▪ With individuals (or very small groups)
Facilitated Sessions ▪ Brainstorming with a larger group led by a facilitator
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Each one takes more time than interviews, but may generate more
Requires an experienced facilitator Requires an initial understanding of the user
area Participants feed of of each others ideas Participants can negotiate disagreements
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Prepare
Conduct
Business Interviews
Conduct IT
Interviews
Write up Interview Summaries
Identify Business Processes
Conduct Prioritization Session
Write Requirements Definition
Use Data Profiles
to Research Data
Sources
Build Initial Bus Matrix
Business Executive What are the business issues? What is your vision?
Business Manager or Analyst What are your measures of success? What data do you use? What analysis do you typically do?
IS Data Audit Data quality or quantity issues? Potential roadblocks (political or technical)? How is ad hoc analysis conducted?
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Interviews Interview Team
▪ lead interviewer, scribe, observers
Conducting the Pre-interview Research
Selecting the Interviewees
Developing the Interview Questionnaires
Scheduling the Interviews
Preparing the Interviewees
Conducting the Interviews ▪ Interviewer Rules
▪ Remember your Interview Role
▪ Verify Communications
▪ Define Terminology
▪ Establish Peer Basis
▪ Maintain Schedule Flexibility
▪ Avoid Interview Burnout
▪ Manage Expectations Continuously
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Process Date Product Vendor Shipper Dist
Cntr
Store Promo
Purchase
Orders
X X X X
Dist Cntr
Deliveries
X X X X X
Dst Cntr
Inventory
X X X
Store Deliveries X X X X X
Store Inventory X X X
Store Sales X X X X
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