Feature engineering — the model is mostly the features
Most of a model's performance comes from the features fed to it, not the algorithm, and a feature store exists to stop the same feature being computed three inconsistent ways across a team.
Not yet scoped.
Why
The PoC builds a handful of engineered features (rolling windows, ratios, lags) for one prediction task and shows the accuracy delta from feature work versus model swaps.
How it works
Not yet built.
Where it lands in Jayverse
Number: budget indicator work as engineered features first, model choice second. For any reading Number distributes, build rolling windows, ratios and lags before swapping models, and record the accuracy delta from feature work versus model swaps as evidence, not assumption.
Number: keep one definition per feature, a small feature store. Stop the same rolling-window or ratio being recomputed three inconsistent ways across different readings.
Key expressions
Words and phrases from this page worth keeping, with the Korean meaning and the sentence they come from.
Expression
뜻 · 쓰이는 자리
feed (features fed to it)
(모델에 데이터를) 공급하다, 투입하다 · 입력값을 모델에 넣어준다는 뜻. "the features fed to it"
feature store
피처 스토어(특성 저장소) · 여러 팀이 같은 피처를 일관되게 재사용하도록 관리하는 시스템. "a feature store exists to stop the same feature being computed three inconsistent ways"
rolling window
이동 윈도우(구간) · 일정 구간씩 옮겨가며 계산하는 통계 기법. "rolling windows, ratios, lags"
lag (특성으로서)
시차(지연) 변수 · 과거 시점의 값을 특성으로 사용하는 기법. "rolling windows, ratios, lags"
accuracy delta
정확도 차이(증분) · 두 접근법 간 성능 차이를 수치로 나타낸 것. "the accuracy delta from feature work versus model swaps"
model swap
모델 교체 · 알고리즘 자체를 바꾸는 작업을 가리킴. "versus model swaps"