In designing, selecting, commissioning and modifying software, and in designing tasks using display screen equipment, the employer shall take into account the following principles:

1. (a)

   software must be suitable for the task;

2. (b)

   software must be easy to use and, where appropriate, adaptable to the operator’s level of knowledge or experience; no quantitative or qualitative checking facility may be used without the knowledge of the workers;

3. (c)

   systems must provide feedback to workers on their performance;

4. (d)

   systems must display information in a format and at a pace which are adapted to operators;

5. (e)

   the principles of software ergonomics must be applied, in particular to human data processing.