Such a foundation is essential to ensure that policy can be guided by a strong evidence base. For VET, knowledge of job prospects allows students to make informed choices about training programmes, and policy makers to see whether graduates are obtaining relevant work, clear information about learning outcomes helps employers to understand what qualified recruits have learnt. Better data and information can be provided either through one-off surveys of those leaving vocational programmes, or by tracking cohorts of individuals through vocational programmes into employment.