Illinois manufacturers usually sell through somebody else
The industrial base around Chicago and the collar counties is dense with fabricators, machining shops, stampers, converters and machinery builders, and a large proportion of them reach customers through industrial distributors and manufacturers representatives rather than direct. That is a sensible way to cover a market. It is also the single biggest blind spot in most manufacturers pipelines.
When a rep reports by email once a month and a distributor is measured only by total purchases, the factory has no independent view of what is being quoted, what was lost and why. Attribution on every opportunity fixes that without changing the commercial relationship. The rep still owns the territory, but the activity is visible while it is happening, which turns the quarterly review from an argument about impressions into a discussion about a shared record.
Distributors are branches, not a logo
A distributor relationship is really a collection of branch relationships. Orders come from branches, product preferences form at branches, and a branch that stops specifying your product can be invisible for two quarters if the account is measured at group level. Branch-level records with last order date and stocking position make that visible early, when a visit still solves it.