Last edition, we followed the cost of an unresolved decision into the accounts. It never showed up as one entry. It showed up in pieces: rework in one cost center, overtime in another, a write-down in a third. The enterprise paid the full price in installments and never got one bill.
This edition asks a harder question: what happens when the organization plans for those installments?
The buffer is not the problem
Every serious operating plan has slack in it. It might be called a contingency line, a capacity cushion, a discount allowance, a schedule float or a variance tolerance. These exist for good reasons. Markets move. Suppliers miss. Forecasts are estimates. A plan with no protection is fragile, not disciplined.
Finance teams that build buffers are doing their job. So are operations leaders who hold back capacity and sales leaders who protect room to negotiate.
So none of this is an argument against buffers. It’s about what a buffer can absorb without anyone noticing.
How deviation becomes a line item
A buffer is usually sized from experience. Last year we needed about this much extra, so this year we hold about that much.
Look at what that experience contains. Some of it is real uncertainty: weather, demand, price. Some of it is recurring deviation that started with a decision nobody ever resolved.
When the buffer is sized from history, it funds both the same way. The buffer can’t tell market volatility from an open trade-off. It just holds enough to cover what happened before.
That is Budgeted Deviation: recurring deviation, built into the plan as protection, so that the cost of an open decision is paid ahead of time and never looks like a variance.
The effect is subtle. A cost that goes over budget gets questioned. A cost that lands inside its contingency doesn’t. “Within tolerance” closes the conversation. The signal that would have sent someone back to where the decision started is used up before it reaches anyone.
Back to the expansion
Take a company pushing into a new market while holding a target margin, with no settled answer on which one wins. It’s the example this series has followed since Edition 8, and it shows the mechanism clearly.
In this year’s plan, sales carries a larger discount allowance, because last year’s deals needed one. Operations carries extra capacity, because last year’s volume swung unpredictably. Finance carries a margin contingency, because last year’s margin came in under plan.
Each buffer is reasonable on its own. Each was sized by a competent team from real data. And all three are paying for the same open question, three times, in three budgets. None of them is labeled as a decision.
The plan doesn’t fail. It holds. That’s what makes the cost invisible.
What the planning data shows
The Association for Financial Professionals’ 2026 FP&A Benchmarking Survey asked 332 corporate finance practitioners how they plan. 89% use contingency planning. Only 46% report effective horizontal alignment across operations, and only 47% use consistent variables in their planning.
Those numbers measure different things, and they shouldn’t be forced into a ratio. Read together, though, they show a familiar pattern: protection is nearly universal, and the cross-functional alignment that would explain what the protection is for is not.
When the functions aren’t aligned on the variables, each one builds its own cushion for what the others might do. The cushions work. They also make sure the misalignment never has to show itself.
Why it compounds quietly
Budgeted Deviation doesn’t stay the same size. Each cycle, the buffer that absorbed last year’s open decision becomes the evidence for next year’s buffer. The plan learns to expect the deviation until it stops reading as deviation at all. That’s the Inherited Baseline again, this time in the budget. The organization isn’t careless. It’s protected, and the protection sits between the cost and the question that caused it.
The signal
A buffer answers “how much might we need?” It can’t answer “why do we keep needing it?”
That second question lives upstream, at the point where intent was set and a trade-off was left open. Until the signal from that point is visible, the plan will keep funding the gap, and the gap will keep looking like prudence.
Action does not create the signal. It carries it.
The standard is alignment.
Source: Association for Financial Professionals, “AFP Survey Reveals Structured Scenario Planning Separates Top-Performing Corporate Finance Teams.” 2026 AFP FP&A Benchmarking Survey Report, released January 2026. Survey of 332 corporate finance practitioners, August to September 2025.