A method for operating an order-picking system (100) is described, comprising: providing goods gathered in batches in a batch buffer (1), batch-wise sorting of the goods in a matrix sorter (2), the goods in the order-picking system (100) being conveyed by a multiplicity of transport units which have in each case a receiving unit for receiving the goods and the transport units in the matrix sorter (2) are conveyed at least in sections by a matrix conveyor (22), wherein a control unit (7′) dynamically controls the conveying speed of the matrix conveyor (22) in such a manner that the conveying speed is dependent on at least one parameter of the conveyed transport units and/or goods.