Interactive development requires the collaborative efforts of traditional software engineering and human-centred design (HCD). Organisations that develop interactive products must establish a multidisciplinary culture and integrate human-centred design into the software development process. Appropriately, selected metrics coupled with an effective measurement program assess an organisations competency level in defining, practising and integrating human-centred activities into traditional software development. The capture and dissemination of experience affords benefits of reuse to be conferred organisation-wide. Quantitative assessment of human-centred process performance, as part of routine quality assurance activities, raises an organisations human-centred maturity in the Usability Maturity Model capability scale.