Goal Attainment Elasticity (GAE) — measures the elasticity of goal achievement.
Goal Attainment Elasticity (GAE) is the sensitivity of goal achievement probability to management actions.
A goal is not an action — it is a state.
Elasticity is always calculated relative to a specific goal.
ROMI ≥ 1.5
EDP < 0.25
Growth ≥ 25%
RT-API ≤ 100%
Stability (OPM-24: Stable + Growth ≥ 60%)
SKU exit from degradation
How much current actions move the SKU closer to the goal:
We select a set of reasonable actions (not extreme ones)
For each reasonable action a:
max (Pₐ) — the highest goal probability among all available actions
C — "cost of action" (effort, risk, resources)
GMV growth with PA-ROMI ≥ 1
Stabilization with EDP < 0.3
Inventory offloading without damaging SCI
Reaching scaling phase within 2–3 weeks
Strategy Drift Index (SDI) — strategy deviation index / strategic drift index.
SDI is always calculated relative to a specific goal. It identifies and measures the gap between the declared (or chosen) strategy and the actual management actions taken and their effects.
When tactical actions begin to contradict the stated goal
What counts as a "strategy" in SDI logic
A strategy is a target state, not a list of actions.
SDI is always calculated relative to a specific goal.
Examples of strategic goals:
Algorithmic Trust Score (ATS) — the marketplace algorithm's trust level toward a SKU.
ATS ≥ 0.75 — the algorithm "trusts" the SKU: ads, prices and promotions can be scaled carefully
0.55–0.74 — moderate trust: growth is possible, but only with RT-API and PCSI under control
0.35–0.54 — low trust: any pressure is risky, focus on stability
<0.35 — "test mode": the algorithm cuts organic reach, ad costs increase
A synthetic metric based on:
The marketplace optimizes not your profit, but:
This is one of the most underrated yet critical hidden factors in marketplaces. It is essentially the reason why two SKUs with identical pricing and ad spend produce radically different results.