Question
Please do not give the book solution, I CANNOT USE IT, and I cant use something already posted on here. Develop an EER model for
Please do not give the book solution, I CANNOT USE IT, and I cant use something already posted on here.
Develop an EER model for the following situation, using the traditional EER notation:
CIS328HW2.pages
CIS 328 Spring 2018 Page !2
A technology company provides offerings to its customers. Offerings are of two separate types:
products and services. Offerings are identified by an offering ID and an attribute of description.
In addition, products are described by product name, standard price, and date of first release;
services are described by name of the companys unit responsible for the service and conditions
of service. There are repair, maintenance, and other types of services. A repair service has a cost
and is the repair of some product; a maintenance service has an hourly rate. Fortunately, some
products never require repair. However, there are many potential repair services for a product. A
customer may purchase an offering, and the company needs to keep track of when the offering
was purchased and the contact person for that offering with the customer. Unfortunately, not all
offerings are purchased. Customers are identified by customer ID and have descriptive data of
name, address, and phone number. When a service is performed, that service is billed to some
customer. Because some customers purchase offerings for their clients, a customer may be billed
for services he or she did not purchase, as well as for ones that were purchased. When a customer
is billed for a service (although some may never require a service of any type), the company
needs to keep track of the date the service was performed, the date the bill is due, and the amount
due.
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