Here is a scenario I have seen play out at more retail brands than I can count. Marketing plans a major promotional campaign — a site-wide event, a social push, a partnership drop. The campaign is well-executed. Traffic spikes. Conversion is strong. And then the complaints start: the top-selling SKUs are out of stock. The promoted items are unavailable. Customers leave empty-handed, and the brand has spent marketing dollars to drive demand it couldn't fulfill.
This is not a Marketing problem. It is not a Planning problem. It is a structural problem — the two functions are operating in silos, and no one built the bridge between them.
Why the Silos Exist
The Marketing-Planning divide is almost always a product of organizational structure and incentive misalignment. Marketing is measured on demand generation metrics: traffic, conversion, revenue. Planning is measured on inventory efficiency metrics: turn, weeks of supply, markdown rate. These KPIs don't conflict in theory, but in practice they create a dynamic where each function optimizes for its own scorecard without accounting for the downstream impact on the other.
"Demand generation and demand management are two sides of the same coin. Most retailers only flip one."
Peng Huang
What a Proper S&OP Process Looks Like
Sales & Operations Planning — S&OP — is the operating cadence that closes this gap. In a retail context, it has three components: a weekly demand signal review, a monthly consensus forecast, and a quarterly strategic alignment session.
- 01Weekly demand signal review: Marketing shares the promotional calendar 6–8 weeks forward; Planning maps it against projected on-hand inventory by SKU
- 02Monthly consensus forecast: Marketing, Planning, and Merchandising align on a single demand forecast that drives both the buy plan and the marketing calendar
- 03Quarterly strategic review: Leadership reviews the S&OP scorecard — stockout rate on promoted items, forecast accuracy, inventory turn — and adjusts the operating model accordingly
The Marketing-to-Inventory Bridge
The tactical tool that makes this work is what I call the Marketing-to-Inventory Bridge: a live dashboard that maps every planned marketing activation against the projected inventory position for the featured SKUs, 6 to 8 weeks in advance. When the dashboard flags a stockout risk — projected on-hand falls below a defined threshold relative to the expected demand lift — the team has enough lead time to either adjust the inventory position (expedite receipts, reallocate from other doors) or adjust the marketing plan (shift the featured SKU, reduce the demand expectation).
The key word is 'lead time.' Most retail brands surface this problem in the week of the campaign, when it's too late to do anything about it. The S&OP process moves the conversation 6 weeks earlier, when there are still options on the table.
The Organizational Shift
Implementing S&OP is as much a cultural change as a process change. The CMO and the VP of Planning need to be in the same room, looking at the same data, and accountable to the same outcome. In the brands where I've seen this work best, the S&OP review is a standing executive meeting — not a planning team exercise that gets escalated when something goes wrong.