When only one employee knows the vendor

The vendor bus factor

Every vendor relationship has a bus factor: the number of your people the vendor knows and would contact. For many small-firm vendors it is one. The supplier's rep has one name, one email address, one mobile number. That works until the person behind them leaves.

Then the signs arrive slowly. Quotes go to a closed mailbox. A price change notice is never read. The rep assumes you went quiet and moves on. Credit terms, pricing, and delivery priority built up over years are lost, and the replacement starts as a stranger.

Reading it from email headers

You can measure vendor bus factor without reading any messages. The addressing part of email headers, meaning sender, recipients, and date, is enough. Group outside addresses by domain, and for each vendor domain count how many of your people have exchanged mail with it in the last 90 days. One is a single point of failure. Zero, for a vendor you still pay, is worth a question.

This also finds relationships nobody knew were concentrated: the one estimator who talks to the key subcontractor, or the bookkeeper who is the only contact at the bank. The Bus-Factor Report works this way. It reads sender, recipients, date, and thread relationships, never subject lines, bodies, or attachments. A domain match is an inferred finding, so confirm it with the people involved before acting on it.

Introducing a second contact

The fix is an introduction, and it works best coming from the person who holds the relationship.

• Pick the vendors that would hurt most: sole suppliers, anyone under contract, anyone extending you credit.
• Name a second contact for each. It does not need to be a peer; an owner or manager is fine.
• Ask the current contact to send the vendor a short note copying the second person, saying who they are and when to use them.
• Have the second contact place one order, approve one invoice, or join one call in the next month.
• Ask the vendor to add a role address, such as purchasing@, to their records alongside the person.

Contract renewals

Renewals are where a single vendor contact costs the most. Auto-renew clauses, notice windows, and price increases usually arrive by email to whoever signed. If that person has left, the window passes and the contract renews on the vendor's terms.

Keep a simple list of every contract with a renewal or notice date, who signed it, and a second person who gets the reminder. Put the notice dates on a shared calendar, not a personal one. When anyone who signed a contract gives notice, the renewal list is one of the first things to hand over.