**4.3 Early warning and forecast function**

The platform automatically calculates the percentage of qualified rate and limit exceeded for each indicator parameter. Data exceeding the limit will be warned in real time. The administrator of each unit conducts on-site treatment in time according to the over-limit situations and eliminates the alarm information. This can achieve realtime control of construction quality (**Figure 16**).

### **4.4 Progress and accuracy report**

According to the data upload status of each Construction section of the whole line, the platform will conduct statistical work according to the set fixed time and a final

**Figure 15.** *Construction quality control.*

**Figure 16.** *Early warning and forecasting.*

statistical statement is presented. Reports can be divided into daily reports, weekly reports and monthly reports according to different time segments. They can also be divided into base, track plate and other different procedures according to the statistical content of the report. Reports can also be produced for the precision statistics of all processes (**Figure 17**).
