Overfitting and Learning Curves: Diagnose the Gap Without Data Leakage
Read training and validation scores together, fit preprocessing inside a pipeline and keep a final test set out of model selection.
Machine Learning / Validation / Overfitting
TECHNOLOGY / KNOWLEDGE / PRACTICE
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Materials on AI, Python, Git, SQL, SAP/ERP, statistics and time series: explanations, examples, practical tips, sources and applicability limits.
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Compare a time-series forecast with a seasonal baseline
Build a previous-season reference, evaluate it on later observations and distinguish calendar alignment from leakage and missing data.
Time Series / Forecasting / Baseline / Validation