1, two people are on duty every day, and three lucky indicators are not on duty every week. You can take turns on these three indicators again, and after five weeks, everyone will be on duty equally;
2, three people are on duty every day, and three unlucky indicators are worth one more day a week. Of course, these three indicators are also rotated among 15 people, and after five weeks, everyone is on duty on average;
5 people are on duty every day (it seems that there are more people), and everyone is on duty for two days a week, which is fair to everyone. . . . . .
4. People with the number 15 are arranged according to the serial number, namely 1- 15. No matter how many people need to be on duty every day, no matter the time period of a week, they will rotate according to the serial number.
The above is for reference only.