PSOS-C and the Full Attribution Chain

Summary

Introducing PSOS-C and the Full Attribution ChainAIVO Journal • October 2025Executive SummaryIn early 2025, the Prompt-Space Occupancy Score (PSOS™) introduced a reproducible way to measure how brands appear within AI assistant responses. It established visibility as a quantifiable, auditable dimension of brand equity.PSOS-C, the conversion-weighted evolution of that metric, extends PSOS beyond exposure. It connects assistant-level visibility to measurable user actions and verified financial outcomes through a transparent, auditable attribution chain. PSOS-C closes the loop between being seen and creating value—transforming AI visibility into a governance-grade financial indicator.Comparison of PSOS Shift and PSOS-C Shift Metrics for Q3 2025, showing PSOS Shift at approximately 6-7% and PSOS-C Shift at around 4%.1 From Visibility to ValueAI assistants now mediate intent and purchase decisions. Traditional analytics track clicks; assistants generate decisions. PSOS-C quantifies that causal chain through three observable stages: StageSignal CapturedTypical Data SourceGovernance ValueExposureFrequency and rank of brand mentions in assistant responsesPrompt-audit logs (ChatGPT o1-preview, Gemini 1.5 Pro, Claude 3.5 Sonnet etc.)Proof of discoverabilityEngagementFollow-on navigation, search continuation, or voice action by userOpt-in telemetry panels (tracking user interactions with consent) and synthetic testsBehavioral validationConversionVerified transaction or lead event linked to exposureFirst-party analytics or CRM systemsFinancial attribution 2 The PSOS-C ModelThe PSOS-C model quantifies how assistant exposure translates into measurable outcomes by weighting each interaction stage:PSOS-C=∑i(wi×Ei×Ci×di×αi)PSOS-C=i∑​(wi​×Ei​×Ci​×di​×αi​) VariableDefinitionRangeSourcewiwi​Baseline visibility weight (share of prompt appearances)0–1AIVO Prompt Audit LogsEiEi​Engagement coefficient (follow-on action probability)0–1Telemetry PanelsCiCi​Conversion probability (verified ev...