Belfast Institute Training and Employment Services which trains many of Ulster's students with severe learning difficulties, was visited by inspectors in October 1995.
The inspectors said: "There is considerable under-achievement by the majority of the trainees. Major weaknesses in the management of the training programme contribute to this under-achievement."
While achievement rates in national vocational qualifications were low many trainees from disadvantaged backgrounds or with severe learning difficulties did well.
The report said: "Record-keeping is inconsistent, poor attendance and time-keeping are not dealt with effectively and some of the needs of individual trainees are not addressed. This results in under-achievement and high drop-out among trainees."
It added: "With the co-operation of the well-qualified and committed staff, the institute can address these weaknesses."