Chapter 190 - Chapter 186: Security Company - 3rd update, seeking monthly pass_2

Nothing is absolute. From a probabilistic point of view, even if something has a good reputation, there is still a chance of problems arising. For instance, airports and airlines are managed by Six Sigma standards because the consequences are severe, and even minor issues must be controlled to a probability of one in a million. This is already very difficult to achieve and a very small number, but if you consider that there are over a thousand flights landing and taking off in city S every day, even if controlled to one in a million, there is still a chance of something going wrong each year.