This Technical Report contains a formalised model based on the human-centred processes described in ISO 13407, Human-centred design processes for interactive systems. It should be used in the specification, assessment and improvement of the human-centred processes in system development and operation.

The scope of the model is based on that for ISO 13407 which has as its scope 'guidance on human-centred design activities throughout the life cycle of interactive computer-based systems'. However, whilst the intended audience for ISO 13407 is given as 'those managing the design process' this Technical Report is intended as guidance for those who are involved in the design, use and assessment of lifecycle processes for system, hardware and software.

Readers of this Technical Report are expected to be familiar with ISO 13407.