Time-Weighted Selection Index (Decay Model)

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This model applies exponential decay so that older factors gradually lose influence as conditions change.

I(t) = Σ [ bᵢ · e^{−λ(t − tᵢ)} ] · xᵢ

Interactive Time-Weighted Index Calculator

Current Time (t) Decay Constant (λ)

Factor	xᵢ	bᵢ	tᵢ

Interpretation:
Recent factors contribute more strongly than older ones. The index automatically adapts to temporal relevance decay.