Interchange Distribution Calculator Working Group (IDCWG) Update IDCWG October 12 th, 2011

PFV Metrics Report A Monthly and yearly report. The data in the report will be captured on a select list of flowgates. The flowgates list will be managed by the IDCWG. The data report will be in form of a statistical average. A seasonal, peak and off-peak statistical breakdown will also be provided for these flowgates.

PFV Metrics Objectives Measure the accuracy of the data submitted by RC(s), BA(s), TO(s) and TSP(s). Measure the availability and the frequency of updated data submission by entities. Validate the correct PFV calculation logic is implemented. Measure the accuracy of the results of the PFV logic. Quantify the differences between the PFV calculations and results with respect to the current IDC logic.

PFV Metrics Measure the availability and frequency of data submittal by responsible entities Compare forecasted to actual data provided by entities Compare Market Flow Calculations performed by OATIs PFV engine to production Calculate the unreported impacts Compare and Validate Non Firm Curtailments Compare and Validate Firm Curtailments Compare and Validate NNL Calculations

Data Availability Determine the upload frequency of the following data: Transmission outages and generator outages. Actual BA Load and forecasted BA Load Real time flows of monitored element and contingency element Real time output of all generators Real time flow of all tie lines Priority of all generators (Firm MW, Non Firm MW ) Count of instances when data not sent by entities at least once an hour (exclude priority of generators) Count of instances where any of these files sizes are below a certain % of max file size. Count of instances when data not sent by entities at least once an hour (exclude priority of generators)

Forecast Accuracy Measure A measure of how well entities and OATI are forecasting for load and generation output for next hour. The following metrics will be captured as part of the report LOAD Show all forecasted values from the previous hour in comparison to integrated load value that materializes over the next hour. A percentage of accuracy between each forecasted value and the integrated value.

Forecast Accuracy Measure Generation impact Measure impact forecasted values from the previous hour in comparison to integrated generation impact value that materializes over the next hour. A percentage of accuracy between each forecasted value and the integrated value will be captured The generation impacts value would be a direct measure of next hour generation output forecast. The default scaled values will be used as the basis for the comparison in the case that no forecast is submitted.

Market Flow Calculation Comparison OATI will be calculating market flows for each market entity. Market entities will continue to submit market flows calculated on their end to OATI. A comparison of the two calculations will be captured as part of the report.

Market Flow Calculation Comparison The following parameters will be used for comparison for each market entity Total Forward Market Impact >0% Total Forward Market Impact >5% Total Reverse Market Impact >0% Total Reverse Market Impact >5% Net Market flow impact >0%

Flowgate Flow Breakdown A total flowgate flow will be split into the following categories: Net Market Flow Impact by each market Net Impact of Inter BA Tags Net Impact of Intra BA Tags Net Impact of each BA GTL The difference between total flowgate flow and the accounted for flow will be the unreported impacts The metric report will highlight any unreported impact on each flowgate

Non-Firm Curtailments and Impacts In the case of TLR level 3 or 4, the difference between IDC production and GTL for the parameters below will be captured Non Firm Inter BA Tags Non Firm Market impacts Non Firm Intra BA Tags Non Firm GTL impacts of Non Market BA(s)

Firm Curtailments In the case of TLR level 5 or 6, the difference between IDC production and GTL for the parameters below will be captured Non Firm and Firm Inter BA Tags Non Firm and Firm Market impacts Non Firm and Firm Intra BA Tags Non Firm and Firm GTL impacts of Non Market BA(s) NNL Allocation

NNL Comparison In the case of a TLR level 5, the difference between NNL calculated in IDC production on a flowgate and GTL impact captured on the same flowgate in GTL engine will be captured as part of the metrics.

IDCWG Update