ABC analysis whereby, for example, products or product lines can be categorized into A, B and C groupings where A represents fast movers, B = medium movers and C = slow movers. D usually represents obsolete items. Frequently drawn as a graph (or curve). See also Pareto – a system of analysis taking account of the 80/20 rule whereby generally 80 per cent of sales are for only 20 per cent of products.