Create an ERD from a business problem. (50 marks)

The ABS Blood Bank
Australian Blood Services (ABS) is a new Non-Government Organisation (NGO) that has just been set up to collect blood and blood product donations from the public. ABS plans to have donation centres in each capital city and most major regional cities throughout Australia. You have been approached by ABS to design and create a database system to track these blood donations.

ABS needs to record the details of each donor. This needs to include the donors full name and address details, along with their contact details, gender, Medicare number and any other details that may be pertinent.

ABS also needs to know about the medical condition of each donor or prospective donor. This includes the details of any surgery, existing medical conditions and any medication that is being taken.

ABS also needs to know if the donor has been overseas in the last three months, which countries that they visited, how long they stayed in each county, whether they contracted any disease while in the country.

Based on the answers to these questions, the ABS staff will decide if it is safe to accept a blood donation from the prospective donor. This is a decision can be made only by an ABS staff member who is a qualified Registered Nurse.

Once the ABS staff member has decided to accept a blood donation from the donor, it is necessary to record the donor details, staff member taking the donation, ABS donation centre, and any other pertinent details in order to clearly identify each individual blood donation.

Tasks:

1. List all the business rules for the ABS. (10 marks)
2. Create an ERD that meets the requirements of the ABS. The ERD should show:
   1. All entities with primary key and any foreign key attributes,
   2. The relationships between entities,
   3. The cardinality and optionality of each relationship. (40 marks)