1. Quality, a requirement for information technologies

The field of information systems concerns the processing of information by electronic equipment (computers). Information processing is based on two elements:

• hardware: electronic components, boards and peripherals;

• software: a set of system or application instructions for automatic data acquisition, storage, transformation, transmission and retrieval.

Like any industrial product, software must meet the needs formulated by customers, or users, who express requirements. A product concept is born in the minds of engineers, who imagine and then design its functionalities. Developers...