1. First, establish an evaluation index system, that is, use those indexes to evaluate the operating efficiency of elevators. These indicators should be mathematically abstracted from the daily operation state of the elevator. For example, we can let x 1 represent the dead time or the average dead time, that is, the running time from the time when the elevator stops running to the time when the elevator carries passengers, assuming, of course, that the elevator has been running at a constant speed. By analogy, an index set (x 1, x2, ..., xn) is established, and then a function z=(x 1, x2, ..., xn) is used to evaluate the elevator operation efficiency.

2. Analyze the main factors and indicators that affect the current elevator operation, sort them according to the degree of influence, and then specify improvement measures for different indicators.

The third question is not clear what it will do.