As trends such as the expansion of teleworking and the promotion of DX gain momentum, renewal of purchasing systems is once again attracting attention. However, there are many similarities among purchasing systems, However, purchasing systems tend to have many similarities among companies, making comparisons more difficult. In this document, we will provide our experience in providing systems to a number of companies, This document will focus on the "points that make the difference" when comparing purchasing systems based on our experience in providing systems to many companies.