Cost Effective
Robots run on batteries and are capable of working for the life of the batteries. They can, therefore, work 24/7, without needing lunch or toilet breaks. So long as their batteries are working they also maintain a 100 percent level of concentration. This means the robot security guard is capable of doing the work of two or three guards, who would normally work in shifts. The running costs of robots are usually cheaper than an equivalent human's wages, which makes financial sense for companies seeking to streamline costs.