How to realize the best attendance scheduling system without scheduling?

Free shift scheduling is to automatically catch shifts, and automatically identify which shift is on according to the commuting settings of each shift by swiping the card. Obviously, there is more than one shift in comparison. The more shifts in comparison, the greater the system overhead, and the stability will not deteriorate for a long time. Therefore, at least automatic shifts should be set by department. If there are many shifts, it is suggested to set them by individuals, that is, a person may only participate in one of 3-4 shifts at most, so it is good to specify 3-4 shifts on the parties, and analyze up to three shifts, which is usually called candidate shifts. This can narrow the scope of automatic class capture more accurately. For people with only one shift, it is good to directly identify this shift. The specific implementation depends on the design of the software. Usually, manual setting in personnel files is the simplest.