Stopwatch is a traditional industrial measurement method. Now, inspired by Toyota Lean, most enterprises are moving closer to Lean. Lean is to reduce costs and improve efficiency, so stopwatch can no longer be used as the main tool to measure working hours. At present, external lean experts and lecturers from Japan basically use software to measure working hours, while in China, vioovi software is used to analyze working hours. Personal sense of use is: 1. Compared with Japanese lean software, the price is much closer to the people. 2. It is more suitable for China enterprises. 3. The operation is more convenient, you can import videos, and you can complete the operation by moving the mouse without programming or anything.