How to monitor the use of working time by office staff?
You could use employee monitoring software https://www.refog.com/employee-computer-monitoring-software.html to monitor employee computer usage. Refog Employee Monitor records and monitors your employee's activities and provides you on-site and remote access to employee's logs and computer screens in real time. The software-only solution can be installed in a matter of minutes, and does not require any hardware other than an ordinary PC. No special surveillance skills or security training are needed to successfully configure and operate Refog Employee Monitor.
there are many ways to solve such a problem
for example i started using mobile tracker https://www.hoverwatch.com/ and i am completely satisfied with this solution. Situations where you need to quickly and accurately determine the location of a person are constantly encountered. In business, we need to control and organize the work of mobile workers.