Description

This curriculum spans the technical and operational complexity of an enterprise-wide forecast governance program, comparable to multi-workshop technical integrations seen in large-scale supply chain or financial planning transformations.

Module 1: Foundations of Forecast Combination in Enterprise Systems

Select between ensemble-based and model-averaging approaches based on historical forecast error correlation across primary models.
Define the operational frequency of forecast reconciliation (e.g., daily, weekly) to align with business planning cycles and data latency constraints.
Establish data lineage tracking for each base forecast to enable auditability during regulatory reviews or model disputes.
Design input validation rules for base forecasts to detect missing, stale, or out-of-bound predictions before combination.
Implement version control for forecast models to ensure reproducibility when re-running historical combinations.
Choose between centralized and decentralized forecast ingestion based on data governance policies and system architecture.
Specify metadata requirements for each contributing model, including training period, error metrics, and feature set used.
Assess computational overhead of real-time combination versus batch processing in high-frequency forecasting environments.

Module 2: Data Preparation and Forecast Alignment

Map disparate temporal granularities (e.g., hourly vs. daily forecasts) using interpolation or aggregation with documented bias assumptions.
Normalize forecast outputs across models to a common scale when combining models with different magnitude outputs.
Handle missing forecasts from individual models by implementing fallback strategies such as last available forecast or weighted redistribution.
Align forecast horizons across models to ensure consistent time-step matching before combination.
Validate time zone consistency across forecasts generated in geographically distributed systems.
Apply outlier capping or winsorization to extreme forecast values that could distort combination weights.
Implement automated checks for unit consistency (e.g., currency, volume) across forecast inputs.
Design buffering mechanisms to handle forecast arrival delays in distributed pipeline architectures.

Module 3: Weighting Strategies and Model Selection

Compare fixed, rolling window, and recursive estimation methods for determining combination weights based on recent forecast accuracy.
Decide between MSE-based, MAE-based, or quantile-loss-based weight optimization depending on business loss function.
Implement constraints on weights (e.g., non-negativity, sum-to-one) to improve stability in volatile environments.
Evaluate whether to include intercept terms in linear combination schemes to correct systematic biases.
Monitor weight volatility over time and trigger re-calibration if weights exceed predefined variance thresholds.
Exclude models from combination if their out-of-sample performance degrades beyond a defined threshold.
Balance model diversity against performance by measuring correlation of forecast errors among base models.
Introduce decay factors in weight calculations to prioritize recent performance in non-stationary environments.

Module 4: Advanced Combination Techniques

Implement stacking regressions using cross-validated meta-learners to combine forecasts with non-linear interactions.
Apply Bayesian model averaging with prior specifications based on model development rigor and domain credibility.
Use trimmed means or median combinations to reduce sensitivity to outlier forecasts in high-variance ensembles.
Integrate quantile forecasts using linear or non-linear combination methods for full distribution synthesis.
Adopt dynamic model selection instead of averaging when structural breaks invalidate historical model performance.
Deploy shrinkage estimators (e.g., ridge regression) to stabilize weights in high-dimensional model pools.
Implement regime-switching combination models that adapt weights based on macroeconomic or operational indicators.
Use recursive combination schemes where combined forecasts feed back into subsequent model training cycles.

Module 5: Uncertainty Quantification and Prediction Intervals

Construct prediction intervals for combined forecasts using bootstrap methods that preserve forecast error dependence.
Account for between-model variance in addition to within-model uncertainty when estimating total forecast variance.
Implement coverage calibration procedures to adjust prediction intervals based on backtesting results.
Decide between parametric and non-parametric approaches for uncertainty estimation based on forecast error distribution.
Propagate input uncertainty from base forecasts into combined forecast variance using covariance-aware methods.
Report interval sharpness alongside calibration metrics to balance precision and reliability.
Integrate expert judgment ranges as soft bounds in uncertainty estimation when data is sparse.
Validate interval stability across multiple forecast vintages to detect overfitting in uncertainty models.

Module 6: Operational Integration and System Design

Design idempotent combination jobs to ensure consistent output during pipeline retries or reprocessing.
Implement caching of base forecasts to reduce recomputation costs during iterative weight tuning.
Structure APIs to serve combined forecasts with metadata (e.g., weights, component contributions) for downstream transparency.
Integrate forecast combination into CI/CD pipelines with automated validation checks before deployment.
Log combination outputs and inputs at full resolution for debugging and post-hoc analysis.
Design failover logic to revert to baseline models if combination system errors exceed tolerance thresholds.
Allocate compute resources based on peak load scenarios, such as month-end forecasting runs.
Implement monitoring for data drift in base model outputs that could invalidate combination assumptions.

Module 7: Governance, Auditability, and Compliance

Document model rationale, including justification for inclusion/exclusion of specific base models in the combination.
Establish access controls for forecast combination parameters to prevent unauthorized modifications.
Implement change logging for all weight updates, model additions, or structural changes to the combination logic.
Define escalation paths for forecast anomalies detected during combination output validation.
Align combination methodology with regulatory requirements for model risk management (e.g., SR 11-7).
Conduct periodic model validation reviews that include stress testing of combination logic under adverse scenarios.
Archive input forecasts and combined outputs for minimum retention periods required by legal or compliance teams.
Produce audit reports that trace final forecasts back to individual model contributions and weights.

Module 8: Performance Monitoring and Continuous Improvement

Define KPIs for combined forecast performance, including accuracy, bias, and directional consistency.
Implement backtesting frameworks that simulate historical performance using out-of-sample vintages.
Compare combined forecast performance against individual base models and naive benchmarks.
Set up automated alerts for performance degradation beyond predefined thresholds.
Conduct root cause analysis when combined forecasts underperform, distinguishing model vs. combination issues.
Schedule periodic re-evaluation of combination methodology in response to structural business changes.
Track forecast value added (FVA) to quantify the incremental benefit of combination over simpler approaches.
Use A/B testing frameworks to evaluate new combination methods in production with controlled rollouts.

Module 9: Domain-Specific Adaptation and Scalability

Adjust combination strategies for hierarchical forecasts by reconciling across levels before or after combination.
Modify weighting schemes in rapidly evolving domains (e.g., new product forecasting) to favor recent model performance.
Scale combination systems horizontally to handle thousands of forecast nodes in supply chain or retail contexts.
Adapt combination logic for intermittent demand models using specialized error metrics like MASE or TIC.
Integrate external adjustment factors (e.g., promotions, events) into combination weights for short-term forecasts.
Support multi-step ahead combination with horizon-dependent weights calibrated separately for each step.
Implement sparse combination models where only top-performing models contribute to forecasts per segment.
Optimize storage and retrieval of combined forecasts using partitioning strategies based on time and business unit.