In the 3rd year of your apprenticeship, you will be issued with an online portfolio (OneFile). Your online portfolio is used to record your performance units which you will work on in your 4th year. 

Performance units are met through an assessment of your normal site work. You will need to demonstrate competent performance for each NVQ unit over a number of jobs covering a specified range of work. This will mostly be achieved by assessor observations (on-site) and recorded professional discussions with your assessor.