## **1. Function Introduction** >[danger] **Provide users with maintenance functions for Pretpaid tariff schemes, allowing them to add new tariff schemes, or modify, adjust the prices of existing tariff schemes.** # ## **2.Operate Process** ### **1）Add a Tariff Scheme** Click the button "Add", edit the tariff scheme name, VAT rate, water settlement cycle, start time, billing mode and other information on the [Add Tariff Scheme Information] page, and click [OK] to add a new tariff scheme. **Note:** The billing mode includes three modes: fixed unit price and stepped water price. >[success] **Fixed unit price:** the water settlement cycle is settled according to the month, and the system will create 6 cycles by default according to the set water settlement cycle.  ### >[success] **Step tariff:** both the water consumption accumulation cycle and the water settlement cycle are calculated according to the month, and the water settlement cycle must be smaller than the water consumption accumulation cycle; the system will create 6 settlement cycles by default according to the set water settlement cycle  ### 【**Example Description**】 | Water Usage Accumulation Cycle (month) | Water Settlement Cycle (month) | Start Time| | --- | --- | --- | | 12 months | 3 months | 2021-01-01 | The first step is 1 yuan / ton, the usage is from 0~50 tons The second step is 2 yuan / ton, the usage is from 50 to 100 tons The third step is 3 yuan / ton, the usage is 100 tons or more | Water Billing Cycle | Water Consumption | Water Settlement Calculation Mode| | --- | --- | --- | | 2021-01-01 ~ 2021-03-31  |30 | 30*1 | | 2021-04-01 ~ 2021-06-30 |60 |（50-30）*1 + （30+60-50）*2 | | 2021-07-01 ~ 2021-09-30  |60 |（100-90） *2 +（60+60+30-100）*3 | | 2021-10-01 ~ 2021-12-31  |60 | 60*3 | # ### **2）Price Adjustment** Click the button [More] in the form operation column, click the button [Price Adjustment] corresponding to the settlement cycle, and make a price adjustment on the [Adjustment of Tariff Scheme] page. Note: If the current time has passed a certain settlement cycle or is in a certain settlement cycle, you cannot make a price adjustment for that settlement cycle.  # ### **3）Moify Tariff Scheme** Click the button [Modify] in the form operation column to edit the tariff scheme name and remarks on the [Modify tariff scheme information] page. **Note:** If the teriff scheme is already associated with an account, modifying the enabled status is not supported.