This study aims to empirically verify the influence of production optimization activities and IT investment activities on the financial performance of sales and net profit in a rapidly changing business environment. In order to, achieve the aim, this research was analyzed using the secondary data, the workplace panel survey data. Production optimization activities and IT investment had a significant positive effect on both sales and net profit. On the other hand, significant results could not be confirmed for the moderating effect according to the difference in communication activity types. It was suggested that standardization, simplification, and automation of the production process are needed simultaneously as practical measures to improve production efficiency and financial performance, and that continuous investment in the IT field is needed.