Understand batch and anomaly Estimated Time of Arrival (ETA)

For each batch and anomaly, Estimated Time of Arrivals (ETAs) are calculated for all downstream locations that are defined by a node record that does not have ETA calculation disabled. An ETA for a batch is calculated from the most downstream interface.The colored rectangle in the top, left-hand corner indicates the product type of the batch.

ETAs for batches are listed in the Batch ETA window using the name of the most downstream fragment for that batch. The ETAs for the batches cannot be edited.

Normally fragments are contiguous in the pipeline, and only exist separately because there is a different fragment in each pipeline segment. However, it is possible for the batch fragments to be separated. In this instance, ETA will be calculated based on the fragment that is furthest downstream in that set. In light of the fact that the formerly contiguous fragments have been separated, they are now displayed on different lines of the Batch ETA window, as they now have different ETAs.

Each ETA has two components:

• Gross Standard Volume (GSV)

  This is the total volume from the batch or anomaly to the node.

• Time

  This is the ETA.

The ETA is calculated as follows:

• For each segment or portion of segment between the batch or anomaly and node, get the transit time. Transit time is the volume divided by flow rate in the segment.

  • Sum the transit times.

  • Add total transit time to current time.

The Batch ETA window and Anomaly ETA window provide information about individual batches and anomalies, respectively. More importantly, these windows give the ETA of a batch or anomaly at each node in the pipeline.