Check the results

In this section, we shall examine the initial results of reconciliation, then change various static and event data settings and rerun the reconciliation to illustrate the effects.

After reconciliation, the color of stream line is changed by the solvability of stream as shown below.

FL001 and FL002 are unmeasured streams and the reconciled values of these streams are calculated by the reconciliation. The input measured value of these unmeasured streams is meaningless.

In the case of the TK1 tank, the tolerance value of the tank is defined as zero, therefore the reconciled inventory value is the same as the measured inventory. This has the effect that the reconciled value FT005 is inferred as a fixed value to balance the TK1 tank even though FT005 has a nonzero tolerance value. The solvability of FT005 is defined as "CRR (Inferred Constant Redundant Flow)".

Change data settings and rerun reconciliation

Change the measured value (99.4) of FT002 to 110 and reconcile again. The color of this stream is changed since it is detected as a gross error stream and the measured value of FT002 is disregarded and not used in the reconciliation.

Change the relative tolerance value of FT002 to 0% from 5% and then reconcile again. The reconciled value of this stream will be the same as the measured value (110).

This illustrates that if the tolerance value of a stream is zero, its flow is fixed at the measured value.

Now that the FT002 stream is fixed, the other streams are systematically detected as gross error streams. Define that FT003 should not be detected as a gross error as shown in the figure below. Reconcile again.

The system detects the FT004 and FT007 streams as gross errors and the imbalance is mainly distributed to these streams.

FL001 and FL002 are already marked as unmeasured. Now define FT008, FT009 and FT006 to also be considered unmeasured in the event data. Reconcile again. Running reconciliation does not destroy existing events for the period being reconciled; it only changes the reconciled values. Therefore, your edits, which made FT008, FT009 and FT006 unmeasured, will survive the repeated execution of reconciliation.

The reconciled value of FT003 is thus distributed by ratio to the downstream, unmeasured streams. The way that AVEVA Production Accounting determines the ratio to use is by looking at the default flow rate configured on the Design Info tab of the balance object’s detail dialog.

Define that FL002 is out of service in the event data and reconcile again. This forces FT004 and FT007 to also be treated as out of service by the reconciliation algorithm. The colors of these streams are all red but the solvability indicator of each is slightly different. While FL002 is "OS (Out of Service Flow)," FT004 and FT007 are "ROS (Inferred Out of Service Flow)."

Two nodes connected to these streams are reconciled as "POS (Problem Out of Service Node)" and the color of those nodes is also red.