13 Our research revealed that evaluation among training customers was, again, mainly focused at Levels 1 and 2. As for Level 3 and 4 evaluation an Industrial Society survey in January 2000 revealed some use of questionnaires to graduates and their line managers after the end of a course. About 20 per cent of those replying also attempted to measure graduates' subsequent performance. Other less frequent methods included focus groups and the aggregation of the training's impact on individual performance in an attempt to identify its impact at various levels within an organisation.