Definition - Skill
The Ability to do something. Sometimes combined with performing to a certain level (standard / competency) and possibly the verification of that performance (certification).
Definition - Standard
Level of Performance required. May relate to a job role (person), team, company, materials, equipment, facility, etc. Required by business model as part of achieving strategic objectives.
Summary Definition: Aptitude X Desire X Learning and Practice = Capability and Capacity
This is the basic formula that determines what an individual and team will have in terms of capability and capacity.