In small and medium enterprises that have not fully introduced production management systems, business achievements may depend on the knowledge, skills, or habits of a specific individual. When business data and other documents are prepared in longhand or when data is decentralized, it takes time to accumulate such records. For such organizational operations of small and medium enterprises, it is clear that a production management system should be introduced for purposes of efficiency because there are many reports. On the other hand, there can be several accompanying problems: deficient knowledge on the part of the software engineer, the difficulty of using a system, and a mismatch between the business and a system. The purpose of this research is to provide useful information for small and medium enterprises that are considering production management systems. Concretely, this article describes a production management system that was jointly developed with a JIS (Japanese industrial standards) hex-head bolt manufacturer. The process is described from development to use, and the improvement in operating efficiency after its introduction is quantitatively detailed.