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# Why Most S&OP Processes Don't Work
- URL: https://www.theplanningnerd.com/why-most-s-op-processes-dont-work/
- Published: 2026-09-10T12:16:14.000Z
- Updated: 2026-09-14T13:26:23.000Z
- Description: Plenty of businesses have an S&OP process on paper. A calendar, a set of meetings, a template deck. Far fewer have one that actually changes what the business does. Here's what usually goes wrong, based on the patterns that show up again and again.
- Author: Shane Fernando
- Tags: S&OP

Plenty of businesses have an S&OP process on paper. A calendar, a set of meetings, a template deck. Far fewer have one that actually changes what the business does. Here's what usually goes wrong, based on the patterns that show up again and again.

## The forecast is treated as a commitment, not a plan

The moment a forecast becomes something people are held to rather than something that helps the business plan, the whole process quietly breaks. People stop updating it honestly, because changing it looks like admitting a mistake rather than reflecting new information. The forecast ossifies, everyone privately knows it's wrong, and the meeting becomes about defending a number instead of improving one.

The fix isn't lowering accountability — it's separating the target conversation (what we're aiming for) from the forecast conversation (what we honestly expect), so people can be accurate without feeling like they're giving up.

## The meeting is too big for real decisions

Decisions get harder to make, not easier, as the number of people in the room grows. In a large meeting, nobody wants to be the one who commits to a call in front of everyone, so discussions drift toward information sharing instead of decision making, and genuinely hard calls get deferred to "take offline."

Smaller, decision-focused forums — with the right people and clear authority to decide — tend to produce far more action than a large monthly all-hands review that covers everything and resolves little.

## Data arrives too late to actually discuss

If the numbers land the night before the meeting, nobody's had time to actually think about them, let alone prepare a considered view. The meeting turns into everyone reading the deck for the first time together, which is a poor use of a room full of decision-makers' time.

Good S&OP processes build in a real buffer between when data is available and when the meeting happens — enough time for people to review, question, and form a view beforehand, so the meeting itself can focus on discussion and decisions rather than first exposure.

## Nobody owns the follow-through

A decision made in an S&OP meeting that has no named owner and no date tends to quietly evaporate. Next month's meeting covers new topics, the old decision was never actually implemented, and nobody notices because there was no clear accountability for it in the first place.

The simplest fix is also the most neglected: every decision leaves the meeting with a named owner and a date, and the next meeting opens by reviewing what happened to last month's decisions before moving on to new ones.

## The horizon is wrong

If the meeting spends most of its time on next week, that's not really S&OP — most of the useful levers (capacity, purchase orders, supplier commitments) are already gone by then. The value of S&OP comes from looking far enough out that the business can still act on what it decides — typically covering the full lead time plus a genuine planning buffer, not just the next few days.

## It's a reporting meeting wearing an S&OP badge

This might be the most common failure of all. Slides get presented. Numbers get reviewed. Everyone nods. And then everyone leaves and does exactly what they were already planning to do, because nothing was actually decided — just reported.

The test for whether your process has this problem is simple: after the meeting, ask what was decided and who's doing something differently because of it. If the honest answer is "we reviewed some slides," the process isn't S&OP yet, regardless of how well the calendar or templates are designed.

## Fixing this doesn't require starting over

None of this requires ripping up an existing process. Most fixes are structural adjustments: separate target from forecast, shrink the decision-making group, build in review time before the meeting, name an owner and date for every decision, and check the horizon actually covers your lead time. Individually small changes. Collectively, the difference between a meeting and a process that actually moves the business.

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*This wraps the first cluster of Planning Nerd cornerstone articles. If you want to see these concepts play out on real data, the* *Nerd Foods dataset* *has S&OP scenario data — base, upside and downside — ready to practise against.*