The Rule No One Remembers Writing: Finding the Orphan Assumptions That Quietly Run Your Company
Photo: Mr Brown, CC BY-SA 4.0, via Wikimedia Commons
Every growing company I have worked with carries at least one artifact of forgotten decision-making: a pricing model built in 2016, a credit term inherited from a founder's first handshake, a reorder point set during a supply climate that no longer exists. Nobody owns these rules. Nobody defends them. Yet they quietly dictate how half the business operates.
I call these orphan assumptions — pieces of institutional logic that have outlived the person, the context, and the reasoning that produced them. They are dangerous precisely because they feel like facts.
The Anatomy of an Orphan
An orphan assumption has three distinguishing features. First, it is load-bearing: the business would notice immediately if it vanished. Second, it is unowned: no individual can explain why it exists or who has authority to change it. Third, it is untested: it has never been deliberately revisited, only passively endured.
Consider a distributor I advised in the Midwest whose entire quoting process ran through a single Excel workbook. The margin formula inside it had been built by a sales manager who left in 2019. When we traced its logic, we discovered it assumed freight costs that had roughly doubled since the workbook was written. The company had been underquoting on long-haul accounts for nearly three years — not because anyone made a bad decision, but because nobody made any decision at all.
The risk was not ignorance. The information about rising freight was available to everyone. The risk was the outdated knowledge the organization had stopped noticing.
Where Orphans Hide
In my experience, orphan assumptions cluster in four places.
Pricing and margin math. Formulas embedded in spreadsheets, quoting tools, or "the way we've always calculated it" are the most common orphans. They combine numerical authority with zero documentation.
Credit and payment terms. Many small and mid-sized US businesses extend Net 45 or Net 60 terms because a founding customer demanded them a decade ago. The terms then spread to every new account by osmosis, unexamined even as borrowing costs changed.
Scheduling and capacity rules. The assumption that a certain shift pattern, minimum order quantity, or lead time is fixed often traces back to a constraint that no longer applies.
Vendor and territory assignments. Sales regions drawn on a whiteboard in 2014 frequently survive every reorganization that follows, shaping commissions and coverage long after the original logic dissolved.
A Stress-Test You Can Run in Two Weeks
Finding orphans does not require an expensive audit. It requires a disciplined fortnight of questions.
Week one: inventory. Ask your team a single question in every function: What is a rule, number, or process you use daily that you have never seen explained in writing? Record everything. Do not debate whether each item matters yet — the point is volume.
Week two: interrogation. For each item, answer four questions. Who created this, and when? What market conditions did it assume? What would break if we changed it tomorrow? What evidence would tell us it is wrong today?
Most items will survive scrutiny. That is fine — the exercise converts inherited habits into owned decisions. But in nearly every company, two or three items will fail badly, and those failures are usually worth more than the entire exercise costs.
Making Ownership Explicit
The corrective is not a one-time cleanup. Orphans regenerate, because businesses change faster than their documentation. The durable fix is a simple rule: every load-bearing assumption gets a named owner and a review date.
A named owner does not mean a person who maintains the spreadsheet. It means a person who is accountable for asking, at least annually, whether the assumption still matches reality. A review date converts "we should look at that sometime" into a calendar entry that a leadership team actually honors.
The Deeper Point
There is a comfortable fiction in leadership circles that risk lives in the unknown — the competitor you have not spotted, the technology you have not adopted. In practice, the more expensive category is the known-but-forgotten: the assumption your own operation runs on that no one has pressure-tested since it was written.
You do not need to know more. You need to notice what you have stopped seeing. Start with the spreadsheet nobody owns, and ask who it is working for. Increasingly, the honest answer is: the past.
