Specifications—Project Architecture

In order to build a software system, we need a list of requirements. What is the purpose of the system? What are the actions performed by the system and against the system? Who will use the system and how? The answers to these questions will let us identify the main parts of the system and the way these parts work together.

System Requirements

Let's take a look at the Orbital Hotel's reservation system's requirements. The purpose of the reservation system is to allow guests to make room reservations. There are several room types each having a number, occupancy, price, availability, description, and image. The reservations can be made by using the hotel's internet website, through the websites of travel agencies (third parties), or by making phone calls to the hotel's client service. Reservations can be also made by internal client service staff who receive phone calls from guests.

When guests use the hotel's website, they will create a user with a username...