Distinguish the functional requirements an engineer would have to specify for a taxi dispatch system.

The requirements are mainly written in a feature style notation, using some state charts, context diagrams and other techniques to describe certain parts of the system. See, for example, Software Requirements - Styles and Techniques [Lauesen00].

The functional requirements are divided into four sections. The three modules in figure 1 are developed by separate groups, each responsible for unit testing. All requirements for the taxi, central and communication link component are written in a feature style notation. In addition, a special part of the taxi component is the positioning system. This is dealt with separately since there are special requirements present on this component. The functional requirements consist of four sections: Taxi (3.1), Central (3.2), Communication link (3.3) and Positioning system (3.4).