Lean UX

In Lean UX, non UX-trained people carry out UX activities involving all members of a development team. This method would be used when if your team has adopted the Agile method of development – where you work in rapid, iterative cycles. Lean UX is all about what you can achieve ‘here and now’ based on the team’s ‘assumptions’, which have been generated in a workshop.

Source: Interaction Design Foundation