A Case Study: Vine Estate Agency Ltd(VEA) is a licensed estate agent, providing a variety of servicessuch as property management, sales, auction, etc. The following isa brief description of the business of VEA:
? VEA staff consists of groups of property managers,property/land sales and auctioneers. Each staff member performsonly one type of services. Except for the head manager of VEA, eachstaff member reports work to his/her supervisor (this thus forms aself reference relationship among staff members).
? VEA keeps a file of properties that are currently tenanted, orready to be tenanted, or for sale. The data stored on each propertyincludes the type
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