Demand Waterfall

What the demand waterfall is today

In the 2026 model, the waterfall has five account-level stages: signal visibility, committee assembly, intent qualification, commercial engagement, and commit. An account moves through them based on observable committee behavior and signal strength, not on whether a single lead clicked an email. Multiple stages can advance in parallel (committees do not wait for one person’s checkbox). Some accounts skip stages (when a warm intro bypasses early signals).

Why the Forrester 2006 version broke

The 2006 waterfall assumed one buyer per deal, linear progression, and lead-centric scoring. Every one of those assumptions failed in the 2020s. Gartner’s 2024 research puts the average B2B buying committee at 6 to 10 stakeholders; deals can move forward on the strength of three engaged stakeholders even if the lead-origin person went dark; the same account can produce three separate opportunities in parallel from different business units.

The result: old waterfall stage conversion rates are essentially noise when applied to real committee-driven deals. The stages are still useful as a mental model. The conversion math needs to be recomputed at the committee level.

How it operates inside the Growleads playbook

Our demand intelligence system replaces the Forrester stage gates with signal thresholds and committee engagement thresholds. A signal-visibility account becomes a committee-assembly account when 2+ stakeholders at the target company have fired a category signal in a 14-day window. A committee-assembly account becomes an intent-qualification account when the signal strength crosses the scoring threshold we set for that ICP. The waterfall still exists; it is just reconstructed around the unit that actually buys (the committee), not the unit that used to fill out forms (the lead).

A concrete example

A client with a 90-day historical sales cycle was forecasting against the Forrester-style waterfall: MQL to SQL to Opp to Closed. Their conversion rates at each stage looked healthy; pipeline output was anemic. Rebuilt around the committee waterfall, the real picture emerged: accounts with committee-assembly stage duration over 21 days had a 7% close rate; accounts under 14 days had a 41% close rate. The lead-centric waterfall had been measuring the wrong unit of time all along.