The Demand Forecast Number Problem That Isn’t Actually About Forecasting

Situation

Every organisation plans and executes against a demand number — but which number that actually is depends on who you ask. Demand, sales, finance: each function tends to carry its own version of it, and which one actually gets treated as “the” demand number varies by organisation. In a mature S&OP process, these are distinct measures reconciled through a defined cadence — cross-functional alignment on one number provides clear direction for planning and execution, supporting the business’s strategy at both the financial and commercial level. Where that cadence doesn’t exist — or is still being introduced — there’s no process driving alignment on a single source of truth. Each function keeps the number that serves its own objectives instead, and the organisation ends up running on siloed planning data with no consensus on what demand actually is.

Operational Insight

The standoff isn’t a communication problem — sales and manufacturing aren’t failing to talk to each other. It’s an incentive problem. Each function is measured against its own target: sales against revenue, manufacturing against efficient production runs, finance against working capital. None of those targets is wrong on its own terms. The problem is that none of them was ever designed to add up to the same shared outcome.

That’s why “align on a demand number” can stay on the agenda for years without resolving. The disagreement isn’t really about whose forecast is more accurate — it’s an honest disagreement about which function’s goal takes priority when they conflict, and that’s a decision nobody’s actually been asked to make.

Where This Shows Up

This shows up as a standing tension rather than a single incident — a recurring “if you build it, we’ll sell it” from one side and “you can’t build without a demand signal” from the other, revisited meeting after meeting without ever quite resolving.

It persists because each side’s position is genuinely defensible. Sales is accountable for revenue — chasing demand signals is what that requires. Manufacturing is accountable for stable, efficient production — a shifting number undermines that directly. Finance is accountable for working capital — committing stock ahead of a confirmed signal is a direct risk. None of these is the wrong priority; they’re three legitimate accountabilities pulling in different directions on the same number.

The cost lands either way: miss or delay the signal, and targets go unmet for lack of stock. Build ahead of one that doesn’t materialise, and the business carries product nobody ordered. Both keep recurring because no single function can absorb another’s risk on its own — someone needs visibility across all three to decide the trade-off on purpose, not referee the same disagreement again next quarter.

Key Takeaway

A lack of consensus on the demand number that keeps resurfacing isn’t a forecasting problem — it’s an unresolved trade-off between three legitimate accountabilities. It only gets fixed once someone with visibility across all three actually owns the decision, not once someone produces a better forecast.

Continue the Conversation

Does your organisation have a process that actually drives alignment on one demand number — or is that alignment assumed to exist, right up until an over- or understock position reveals it never did? This is the unresolved flip side of Integrated Planning: Freeing Up Working Capital in Industrial Supply Chains — that piece covers what it looks like once the process exists and the number gets aligned.