Why is the property management efficiency of large companies so high? Do they have any good management methods and skills?

The efficiency of property management in large companies mainly has two aspects: 1. The system is more perfect than the general property management company, 2. Know how to use tools. For example, many security guards in small companies are punching in the group now, but large companies basically use watermark cameras to manage security guards, such as mark watermark cameras. This kind of software has a time watermark when taking pictures, which can save a lot of time without verifying the authenticity.