Property Estate Agent Clients who want to sell their home go to an estate agent, who will take measurements of their home, flat, or bungalow and record them on a card that is organised by area, price range, and type of property. A similar type of card is completed by potential purchasers and filed in an A4 binder by buyer name. The estate agent matches the needs of potential buyers with available houses on a weekly basis and provides them the data of selected properties. When a sale is completed, the buyer acknowledges that the contracts have been exchanged, the client's information is removed from the property file, and the customer receives an invoice. The top copy of a three-part set is given to the client, with the other two copies being filed. The invoice copies are stamped and archived once payment is received. Monthly invoices are reviewed, and accounts that have not been paid within two months receive a reminder (the third copy of the invoice). Question 2 Discuss the role of a model in software engineering. Identify and elaborate on two properties of a model.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Property Estate Agent

Clients who want to sell their home go to an estate agent, who will take measurements of their home, flat, or bungalow and record them on a card that is organised by area, price range, and type of property. A similar type of card is completed by potential purchasers and filed in an A4 binder by buyer name. The estate agent matches the needs of potential buyers with available houses on a weekly basis and provides them the data of selected properties. When a sale is completed, the buyer acknowledges that the contracts have been exchanged, the client's information is removed from the property file, and the customer receives an invoice. The top copy of a three-part set is given to the client, with the other two copies being filed.
The invoice copies are stamped and archived once payment is received. Monthly invoices are reviewed, and accounts that have not been paid within two months receive a reminder (the third copy of the invoice).

Question 2
Discuss the role of a model in software engineering. Identify and elaborate on two properties of a model.

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