Water Disconnection Calculator Service

Overview

Water Calculator Service is used for creating meter reading, searching meter reading, updating existing meter reading, calculation of water charge, demand generation, SMS & email notification to ULB officials on-demand generation and estimation of water charge on basis of meter reading for existing water application until the application is disconnected.

Configuration Details

MDMS Configuration

There are no additional billing slabs to be configured for water disconnection, the calculation happens with the meter reading if added and uses existing billing slabs.

Billing Slabs:

Criteria :

connection type
building type
calculation attribute
property usage type

The combination of the above can be used to define the billing slab. Billing Slab is defined in mdms under ws-services-calculation folder with the WCBillingSlab. The following is the sample slab.

{
      "id": "1",
      "buildingType": "RESIDENTIAL",
      "connectionType": "Metered",
      "calculationAttribute": "Water consumption",
      "minimumCharge": 100,
      
      "slabs": [
        {
          "from": 0,
          "to": 10,
          "charge": 2,
          "meterCharge": 50
        },
        {
          "from": 10,
          "to": 20,
          "charge": 2.5,
          "meterCharge": 50
        },
        {
          "from": 20,
          "to": 30,
          "charge": 8,
          "meterCharge": 150
        },
        {
          "from": 30,
          "to": 40,
          "charge": 12,
          "meterCharge": 150
        },
        {
          "from": 40,
          "to": 1000000000,
          "charge": 15,
          "meterCharge": 150
        }
      ]
    },
    {
      "id": "5",
      "buildingType": "RESIDENTIAL",
      "calculationAttribute": "No. of taps",
      "connectionType": "Non Metered",
      
      "minimumCharge": 100,
      "slabs": [
        {
          "from": 0,
          "to": 1000000000,
          "charge": 100
        }
      ]
    },

Estimation:

For disconnection application fee, the estimation will return all the related tax head based on criteria.

Following are the exemptions and taxes that are calculated:

Form fee
Scrutiny fee
Meter charge (For metered connection)
Other charges
Security charges
Tax and cess

Water Disconnection Charge and Tax:

Water charge is based on billing slab, for water disconnection application charge will be based on slab and tax based on master configuration.

Interest:

Below is a sample of master data JSON for interest :

{
  "tenantId": "pb",
  "moduleName": "ws-services-calculation",
  "Interest": [
    {
      "rate": 5,
      "minAmount": null,
      "applicableAfterDays":0,
      "flatAmount": null,
      "maxAmount": null,
      "fromFY": "2019-20",
      "startingDay": "1/01/2019"
    }
  ]
}

Penalty:

Below is a sample of master data JSON for penalty :

{
  "tenantId": "pb",
  "moduleName": "ws-services-calculation",
  "Penalty": [
    {
      "rate": 10,
      "minAmount": null,
      "applicableAfterDays": 0,
      "flatAmount": null,
      "fromFY": "2019-20",
      "startingDay": "1/01/2019"
    }
  ]
}

Round Off:

If the fraction is greater than equal to 0.5 the number is round up else it’s round down. eg: 100.4 will be rounded to 100 while 100.6 will be rounded to 101.

Demand Generation:

Whenever _calculate API is called demand is first searched based on the connection no and the demand from and to period. If demand already exists the same demand is updated else new demand is generated with consumer code as connection no and demand from and to a period equal to financial year start and end period.

In case of the update if the tax head estimates change, the difference in amount for that tax head is added as new demand detail. For example, if the initial demand has one demand detail with WATER_CHARGE equal to 120

After updating if the WATER_CHARGE increases to 150 we add one more demand detail to account for the increased amount. The demand detail will be updated to:

The disconnection charges will be the addition of both demand details taxAmount and we can generate demand until the workflow is in PENDING_FOR_DISCONNECTION_EXECUTION.

Note : if there no pending payment when the connection gets approved then the workflow gets updated from PENDING_APPROVAL_FOR_DISCONNECTION to PENDING_FOR_DISCONNECTION_EXECUTION (it skips payment step in the workflow internally).

Here the disconnection charges will be 120+30 = 150

RoundOff is bill based i.e every time bill is generated round off is adjusted so that payable amount is the whole number. Individual WS_ROUNDOFF in demand detail can be greater than 0.5 but the sum of all WS_ROUNDOFF will always be less than 0.5.

Final water charges calculation :

Final Water Charges = Last Billing Period Amount * Days (Proposed disconnection date - Last Billing Date) / No. of days in last billing period

The additional parameter is being sent in calculation request for disconnection application.

disconnectRequest = true if the request is for _calculate api disconnection application.

API List

Title	Link
`/ws-calculator/meterConnection/_create`	https://www.getpostman.com/collections/b9a7bde133b0e1fa465f
`/ws-calculator/meterConnection/_search`	https://www.getpostman.com/collections/b9a7bde133b0e1fa465f
`/waterCalculator/_calculate`	https://www.getpostman.com/collections/c2011085418fe4642728
`/waterCalculator/_updateDemand`	https://www.getpostman.com/collections/b9a7bde133b0e1fa465f

(Note: All the API’s are in the same postman collection therefore same link is added in each row)