Quick Answer: Structure CRM data with a strict one-to-many relationship between a single lead record and its attribution fields, then normalize campaign, channel, and salesperson into separate reference objects. Every lead should store immutable source metadata at capture time—such as first-touch campaign, last-touch channel, assigned owner, and conversion timestamps—so reporting can be filtered, aggregated, and audited without relying on spreadsheet logic or manual reconciliation.
To support accurate lead reporting by campaign, channel, and salesperson, the CRM must be designed around clean attribution and consistent entity relationships. The lead object should act as the system of record, while campaign, channel, and user/salesperson are maintained as linked dimensions with unique IDs rather than free-text values. Capture both original source and current routing data at the moment of ingestion, preserve historical changes through event logs or attribution snapshots, and standardize picklists for source taxonomy so reporting remains stable across paid, organic, referral, outbound, and partner-led motions. This structure allows revenue teams to calculate conversion rates, pipeline contribution, and salesperson performance with high confidence, even when leads move across multiple touchpoints before conversion.