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.