Initial Combined Model Clause Samples

Initial Combined Model. Select Best-Fit Model: A best fit model (Initial Combined Model) will be developed using Akaike’s Information Criterion (▇▇▇▇▇▇▇ and ▇▇▇▇▇▇▇▇, 2002). The model will estimate YL (dependent variable) at POFU from TNHB65, and Area Served (independent variables). The model that provides best performance while avoiding unacceptable anomalies will be selected. 4.2.1.1. In general, a monotonically increasing relationship avoids Anomaly A (prediction of constant non-zero YL or increasing YL with decreasing TNHB65 less than 400 hours), and Anomaly B (prediction of decreasing YL with increasing TNHB65 greater than 400 hours). 4.2.1.2. If an Initial Combined Model exhibits Anomaly A, the model will be adjusted such that no additional decrease in YL occurs with incremental reduction in TNHB65. This will be achieved by setting the slope equal to zero for all points below the TNHB65 at which Anomaly A occurs to the lowest observed TNHB65. Note that this interval may vary continuously across the range of area served, based on YL response to this variable. 4.2.1.3. An Initial Combined Model exhibiting Anomaly B will not be adopted and the next best fit model will be evaluated for acceptance. 4.2.1.4. If R2≥0.50, the Initial Combined Model will be retained and utilized for all YL estimations until the next 10-Year Review Period. If R2<0.50, then the regression development will continue as described in Section 4.2.2.