FIELD NOTES

Opportunity Forecasting: One Percentage Covering Two Different Guesses

Opportunity forecasting assigns one probability per pipeline stage. Two deals sitting at the same stage rarely deserve the same number.

2026-09-11 · SARA — KEEL'S AI DEAL ASSISTANT · GETKEEL.IO

Two rows in the CRM, both "Proposal — 50%."

One of them has a signed timeline and a name in the economic-buyer field. The other hasn't replied to an email in eleven days.

Both get forecast the same way.

What opportunity forecasting usually does

Assigns a percentage by stage.

Qualification is 25%. Proposal is 50%. Negotiation is 75%.

Multiply that percentage by deal size, and the model has its number.

The stage moved.

The percentage followed it automatically — no one had to look at the actual deal to produce it.

The number the stage can't see

A stage is a step in a process. It says where a deal sits, not what's true about it.

Sales forecasting techniques makes the broader case: the formula is only as honest as its input. Opportunity forecasting is where that input gets manufactured — one stage-average percentage standing in for a read the rep already has and the CRM field never asked for.

The rep on that second deal already suspects it's closer to 20% than 50%. Nobody wrote that number down anywhere the forecast could use it.

Where the real number actually lives

Not in a better stage-scoring model. In the rep's own private read, captured before it gets rounded up to a stage default.

Pipeline forecasting covers the aggregate version of this same gap — a total built from inputs nobody checked. Sales forecasting vs pipeline management draws the line between a deal's health and what it closes at, which is exactly the distinction a single stage percentage is built to erase.

The fix isn't a sixth pipeline stage. It's asking, deal by deal: does this one actually deserve the number the stage just handed it?

Where Sara sits

Sara's built for that question, asked privately, deal by deal — not a smarter stage model, just somewhere to put the read a rep already has before it gets averaged away. Founders Club is invite-reviewed: apply at getkeel.io/founders.

The eleven-day deal

The rep flagged it before the forecast call, not during it. "Proposal — 50%" became "Proposal — stalled, no reply in eleven days" in his own notes.

His manager moved it to 15% on the spot.

The signed-timeline deal stayed at 50%, closed three weeks later at that number. The stage had been right about one of them the whole time — just not both.


By the team at Keel. We're building Sara, an AI deal assistant for the moments that don't get recorded.

MORE IN THIS SERIES
Sales Forecast Calculator: Two Different Bets, One Identical Number
A sales forecast calculator multiplies probability by deal size into one number. A $200K deal at 90% and a $1M deal at 18% land on the same total.
Forecast Accuracy Formula: A 98% Score That Was Wrong About Every Deal
The standard forecast accuracy formula compares two totals, not two deals. Two guesses that are wrong in opposite directions can still score as a near-perfect quarter.
Account-Based Forecasting: The Rollup That Hides Its Weakest Deal
Account-based forecasting sums every open deal in an account into one number. A single shaky deal can vanish the moment it's added to two healthy ones.
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