Business Rules: A Case Study - High-Performance Web Databases: Design, Development, and Deployment - page 131

Exhibit 9-2. Preliminary 13 business rules for the nanny agency.

1. A caregiver is a person whose livelihood is to provide dependent care and light
housekeeping services for a family in the family's home.
2. A family is a group of people who share a common dwelling and who desire either
dependent care, light housekeeping support, or both.
3. A family employs zero, one, or many caregivers. A caregiver provides services for
zero or one family.
4. A contract is a written agreement signed by a family and a caregiver which is
designed to eliminate job misconceptions.
5. A contract specifies dependent care, housekeeping services, caregiver salary,
caregiver payment schedule, and caregiver benefits.
6. A caregiver may live with the family or may live elsewhere.
7. The agency provides a substitute caregiver at no extra charge to the family if the
original caregiver leaves without advance notice and without good cause.
8. The substitute caregiver is guaranteed only if the family pays the full agency fee at
least one week prior to the caregiver's first day on the job.
9. An employment application is a written request from a caregiver which specifies
caregiver name, address, experience, salary requirements, references, and religion.
10. A caregiver is affiliated with zero or one religion. A religion is affiliated with zero,
one, or many caregivers.
11. The agency removes a family application after one year if the family has not
contracted with a caregiver in that time.
12. A family application requests one or many services. A service is requested by zero,
one, or many family applications,
13. A service requires zero, one, or many skills. A skill is required by zero, one, or many
services.

• Caregiver — Rules 1, 3, 6, 7, 9, and 12
• Family — Rules 2, 3, 6, 7, 8, and 11
• Contract — Rules 4, 5, 9, and 12
• Services — Rules 12 and 13

Some business rules (e.g., rule 3) are associated with more than one data
subject.

During this exercise, the business suspects that the term family should
be expanded in Scope and renamed Customer. A note is made to bring this
to Mary's attention.

OBTAINING CONSENT FROM BUSINESS RULE SOURCE

For step 12, the business rule administrator faxes Mary a copy of the 13
business rules and asks for updates, comments, and approval on the work.
The project plan is updated to include a potential business rule acquisition
session with a caregiver to gather additional rules and to expand the scope
of these initial rules.