Train / Validation / Test Design
Train / Validation / Test Design groups the core ideas a learner needs at the 6 · splitting, validation & experiment design stage. Work through the lessons in order when new to the area, or use them independently as a reference when implementing an analysis.
Learn the mechanism one decision at a time
Work through the lessons in order if the topic is new. If you already know the basics, open the specific leaf lesson that matches the operation, diagnostic or failure mode you need.
1Definition→
2Mechanism→
3Example→
4Diagnostic→
5Decision
Why separate training and evaluationWhy separate training and evaluation is a practical concept within Train / Validation / Test Design. It helps turn the broader workflow stage “6 · Splitting, Validation & Experiment Design” into an explicit analytical decision that can be explained, implemented and checked. The concept should be understood in terms of purpose, mechanism, assumptions, evidence and downstream consequences.
02Holdout splitHoldout split is a practical concept within Train / Validation / Test Design. It helps turn the broader workflow stage “6 · Splitting, Validation & Experiment Design” into an explicit analytical decision that can be explained, implemented and checked. The concept should be understood in terms of purpose, mechanism, assumptions, evidence and downstream consequences.
03Three-way train-validation-testThree-way train-validation-test is a practical concept within Train / Validation / Test Design. It helps turn the broader workflow stage “6 · Splitting, Validation & Experiment Design” into an explicit analytical decision that can be explained, implemented and checked. The concept should be understood in terms of purpose, mechanism, assumptions, evidence and downstream consequences.
04Stratified splitStratified split is a practical concept within Train / Validation / Test Design. It helps turn the broader workflow stage “6 · Splitting, Validation & Experiment Design” into an explicit analytical decision that can be explained, implemented and checked. The concept should be understood in terms of purpose, mechanism, assumptions, evidence and downstream consequences.
05Group-aware splitGroup-aware split is a practical concept within Train / Validation / Test Design. It helps turn the broader workflow stage “6 · Splitting, Validation & Experiment Design” into an explicit analytical decision that can be explained, implemented and checked. The concept should be understood in terms of purpose, mechanism, assumptions, evidence and downstream consequences.
06Time-aware splitTime-aware split is a practical concept within Train / Validation / Test Design. It helps turn the broader workflow stage “6 · Splitting, Validation & Experiment Design” into an explicit analytical decision that can be explained, implemented and checked. The concept should be understood in terms of purpose, mechanism, assumptions, evidence and downstream consequences.
07Seed stabilitySeed stability is a practical concept within Train / Validation / Test Design. It helps turn the broader workflow stage “6 · Splitting, Validation & Experiment Design” into an explicit analytical decision that can be explained, implemented and checked. The concept should be understood in terms of purpose, mechanism, assumptions, evidence and downstream consequences.