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Bordeaux: Business Intelligence - Case Exercise – Dimensional Modeling
You are to construct a star schema for Simplified Automobile Insurance Company. The relevant
dimensions, dimension attributes, and dimension sizes are as follows:
Attributes: InsuredPartyID and Name.
There is an average of two insured parties
for each policy and covered item.
Attributes: CoverageKey and Description.
There is an average of 10 covered items
per policy.
Attributes: AgentID and AgentName. There
is one agent for each policy and covered
Attributes: PolicyID and Type. The
company has approximately 1 million
policies at the present time.
Attributes: DateKey and FiscalPeriod
Facts to be recorded for each combination of these dimensions are PolicyPremium,
Deductible, and NumberOfTransactions in 60 months.
a. Design a star schema to track the frequency of changes to policies.
b. Estimate the number of rows in the fact table, using the assumptions stated previously.