The chain can include content or campaign source, CTA, selected route, form completion, consent, identity match, owner assignment, response, fit evidence, audit or package recommendation, and closure. If a later opportunity, agreement, billing event, recognized revenue event, or implementation outcome occurs, connect it only through the identifiers and evidence that support that link. Missing events should remain missing rather than be inferred for reporting completeness.
A person may interact through search, social, referral, direct navigation, or several internal stakeholders before a company decision. Anonymous activity, device changes, incomplete identity, offline conversation, and consent limitations constrain the available sequence. A model can compare attribution views, but the report should state its method and uncertainty. First-touch or last-touch convenience is not causal proof.