Katayama explains that if a large distributor can handle everything, then a bookstore need only engage in ordering and return procedures with this one source. However, if there are ten different distributors, then a bookstore must deal with all ten-and with ten different data formats. All of a sudden operations get more complicated.
片山成二說明，假設某家大型經銷商可以代銷所有書籍，那麼書店只需跟這家經銷商作進退貨手續；但若經銷商分成 10 家，進退貨手續就要作 10 次，而且 10 家經銷商的資料規格各不相同，徒然增加了作業的複雜度。