Understand why Metering-Ticketing (Batch Meter) has been discontinued

The decision to split the Metering-Ticketing (Batch Meter) application into the Virtual Flow Computer (VFC) and the Batch Transfer Management applications was driven by our evolved understanding of the operational use of metering and ticketing as two distinct, but related, processes and the need to provide a more extensible and maintainable design.

A meter is a physical device that measures flow through a location in a pipe. The information provided directly by a meter is the volume quantity passing through. This can be in the form of a flow rate (number of units of volume passing through per unit of time), a volume count (number of units of volume passed through since the meter started), or both. 

This information is provided by Remote Terminal Units (RTUs) and is saved in the rate table records in the RealTime database (RTDB). The VFCs provide this same information, except that it is validated, corrected for the effects of temperature and pressure, and totalized in the case where several physical devices are used to produce a single volume quantity. If additional information connecting the volume quantities to batches is included, we have a batching meter. In the latest AVEVA Pipeline Operations for Liquids release batching meter data is provided by associating the VFC data with Batch Transfer data. This process differs from the Metering-Ticketing application in previous AVEVA Pipeline Operations for Liquids versions, where meter data and batching data were combined within a common set of tables.