Change Period Consumption
Application component: Meter Readings
App type: SAP GUI
Description:  In order to determine the expected meter reading for a register on a specific date, you need data on the metering patterns of the register or the consumption patterns of the customer. You can take this information from previous meter reading results, from a predefined periodic consumption value, or from a predefined period demand. The period consumption or the period demand is required to determine expected values for extrapolation if any of the following points apply: A representative base period does not yet exist (for example, for meter readings after installation and move-in)The consumption patterns of the customer have changed (for example, if the number of people living in the household has changed)The physical conditions of the customer's environment have changed (for example, by converting the measuring accuracy (register factor) of the meter during the extrapolation period)The calculation of meter readings and budget billing amounts to be extrapolated, has been influenced (for example, if the rate framework or the consumption patterns of a customer have changed) 
Key features:  To enter or change the period consumption, enter a contract, an installation or a device as well as a date in transaction Maintain Period Consumption and choose Continue. On the next screen, a list of all registers will be displayed with their valid period values according to the date you entered. To display a register's metering pattern from the installation date, position the cursor on the relevant line and choose Maintain History. On this screen, period values and meter reading results are displayed for the selected register.  When you change the period consumption, you must pay attention to the following points in order to keep settings consistent: You must enter a period for which the new period consumption is valid. You must ensure that validity periods for the various consumption values do not overlap and are without gaps from installation time to removal time, or from installation time to infinity. The system performs the appropriate consistency checks. You should always enter or change the period consumption on the entry date of meter reading results, for technical installation, for installation relevant to billing or the time of installation. Entries or changes must be complete by the day after at the very latest. If you do not do this and you define the period consumption from a date that is more than one day after the last meter reading, the calculation of the expected consumption for the forecast period is split into two subintervals. This may cause two period consumption values to be created for extrapolation and can lead to distortion when determining the expected consumption. Example A period consumption value of 4500 kWh / year was entered on 01.02. This was changed to 2500 kWh / year on 12.15 (within the forecast period).The sum of the weighting units for one year is 1,000.The expected meter reading is determined as follows:For the period 11.30. to 12.15, when the change was made, the expected meter reading is extrapolated based on the previous period consumption. Determination of consumption per weighting unit by dividing the period consumption by the weight of the validity period:4,500 kWh : 1,000 = 4.5 kWh Extrapolation of consumption for period 11.30. to the date when changes to the period consumption were made on 12.15.:4.5 kWh x 50 = 225 kWh  For the period from the period consumption change to 12.31., consumption is extrapolated from the new period consumption: Determination of consumption per weighting unit by dividing the period consumption by the weight of the validity period:2,500 kWh : 1,000 = 2.5 kWh Extrapolation of period consumption for the period from the change date on 12.15. to 12.31.:2.5 kWh x 50 = 125 kWh 1.Determination of the expected meter reading on 12.31. by adding the consumption values from the meter reading on 11.30.:1,200 kWh + 225 kWh + 125 kWh = 1,550 kWh  For the first subinterval, the period consumption valid from 01.02. (4500 kWh / year) is created. For the second subinterval, the period consumption valid from 15.12. (2500 kWh / year) is created. As the old period consumption no longer truly reflects the consumption patterns of the customer, the extrapolation results are also distorted.