Adults have an active role in their own learning and training. Non formal and informal education is the cornerstone for a lifelong learning and career development. But related knowledge and skills, derived from several years of professional experience, personal development, or continuous vocational training, are hardly recognized in the formal education arena. Candidates for a diploma or qualification have to confront more or less referenced educational syllabus. For a better classification and promotion of individual knowledge and skills, and a more effective definition of associated competency proficiency levels, this paper investigates two approaches, supported with tools, so as to guide candidates in self-assessment and as such facilitate knowledge and skills validation by examination boards.