Competency or capability?
Because competencies and capabilities are assessed differently, it is worth being clear on the difference. A competency is a defined standard of performance, focused on the outputs of work and what can be observed. Its scope is specific, so achievement can be assessed against objective, agreed criteria. A capability is broader: the skills, knowledge and behaviours a person brings to their work, set out as directional statements that call for professional judgement.
A clinical example shows both. Inserting a cannula is a competency, and understanding and addressing a patient's concerns is a capability. Inserting a cannula safely and sympathetically in a distressed patient draws on both.
The terms are not used the same way everywhere, and many respected professional bodies use "competency" to cover both. The distinction is still a useful one when you design how skills are assessed.