What Is S&OP and Why Most Mid-Market Companies Get It Wrong

Sales & Operations Planning — S&OP — is one of those management concepts that sounds simple on paper and proves devilishly hard to execute in practice. Done well, it is the single most powerful operational process a mid-market company can implement. Done badly — or halfway — it creates the illusion of alignment while the real disconnects between sales, operations, and finance continue to compound quietly in the background.

The business case is well-established. Companies with mature S&OP processes consistently outperform their peers: 15–20% improvement in forecast accuracy, 10–15% reduction in inventory carrying costs, and measurable improvements in cash flow and service levels. Yet Gartner's Supply Chain Planning research finds that fewer than 20% of mid-market companies have achieved even a basic level of S&OP maturity.

The gap between knowing about S&OP and actually running it effectively is wide — and it's not primarily a technology problem. It's a process design and organisational alignment problem. This article explains what S&OP actually is, why most mid-market companies fail at it, and what a practical path to maturity looks like.

S&OP is an integrated business planning process that aligns demand, supply, and financial plans into a single, coherent view of the business — reviewed and approved at the executive level on a regular cadence.

That definition has three elements that matter. First: integrated. S&OP is not a forecasting exercise, a demand planning meeting, or a supply review. It is the process that brings those individual functions together and reconciles their views. Second: business planning. S&OP operates at the level of the business, not the SKU. It deals in volume, revenue, and capacity — not in individual purchase orders. Third: executive level. S&OP without senior leadership engagement is just another operational meeting. The decisions that S&OP is designed to make — about capacity investment, product portfolio, pricing, and market prioritisation — require executives in the room with the authority to commit.

What S&OP is not: it is not demand forecasting (that is an input to S&OP, not the process itself). It is not a supply chain initiative (it spans sales, marketing, finance, and operations). It is not a software platform (the right tools support S&OP, but no software has ever substituted for process design and organisational will).

This five-step cycle, run monthly, is the backbone of effective S&OP. The power isn't in any individual step — it's in the integration between them, and in the discipline of running the full cycle every single month regardless of how busy things get.

In our experience working with mid-market brands across Hong Kong and Australia, S&OP failures cluster around five consistent patterns. They are worth naming precisely, because each one points to a different fix.

Failure 1: Treating It as a Supply Chain Initiative

The most common S&OP failure mode starts before the first meeting is ever held: the project is owned by supply chain, and every other function treats it as someone else's process. Sales attends reluctantly. Finance sends a junior analyst. Marketing doesn't show up at all.

The result is a supply chain team doing their best to “guess” what sales will do, reconciling those guesses against a production plan, and presenting the output at a meeting where no one with commercial authority is engaged enough to challenge the assumptions or commit to the plan. This isn't S&OP — it's a supply planning exercise with a fancier name.

S&OP must be owned at the CEO or COO level. Supply chain is the process facilitator, not the business owner.

Failure 2: Monthly Meetings Without Decision Authority

Even when the right functions are in the room, S&OP fails when the meeting has no authority to make decisions. Open issues are “noted,” escalation paths are unclear, and the same topics recycle month after month without resolution. The meeting becomes a reporting exercise rather than a decision forum.

Effective S&OP meetings have an explicit decision log. Every agenda item is either a decision to be made, a recommendation to be approved, or an issue to be escalated (with a named owner and a deadline). If nothing is decided, the meeting failed — regardless of how thorough the presentation was.

Failure 3: Spreadsheets as the Planning Infrastructure

Spreadsheets are the default planning tool for most mid-market companies, and for simple operations they can work adequately. But S&OP requires integrating data from multiple functions — sales forecasts, inventory positions, production schedules, supplier lead times, financial targets — and reconciling them against a shared baseline. In spreadsheets, this process is slow, error-prone, and brittle.

The deeper problem isn't the spreadsheet itself — it's the version control chaos that follows. Which demand forecast are we using? Is this the version that includes the new product launch? Did someone update the supplier lead times after the last disruption? When the single-source-of-truth is a shared drive folder full of “FinalForecast_v7_REVISED_actualfinal.xlsx” files, the S&OP meeting spends the first 20 minutes reconciling data rather than making decisions.

As we covered in our guide to choosing supply chain software without wasting $2M, the right tool for S&OP doesn't have to be expensive — but it does need to provide a single, version-controlled view of the integrated plan that every function can access and trust.

Failure 4: No Connection to Financial Plans

A sales and operations plan that doesn't connect to the financial plan isn't an integrated business plan — it's two separate plans that happen to coexist. This disconnect is especially common in mid-market companies where the annual budget is owned by finance, the commercial forecast is owned by sales, and the supply plan is owned by operations. Each function optimises for its own targets, and no one is accountable for the gap between the sum of the parts and the whole.

The fix requires finance to be a full participant in the S&OP cycle, not a downstream recipient of the output. When the supply review reveals a capacity shortfall that will require either demand shaping or capital investment, finance needs to be in the room modelling the P&L impact of each option in real time — not reviewing the decision three weeks later.

Failure 5: Lack of Executive Sponsorship

S&OP is a cross-functional process that requires functions to share information, accept constraints, and sometimes subordinate their individual targets to a collective plan. This level of collaboration doesn't happen without a senior executive actively driving it.

Without executive sponsorship, S&OP devolves into functional silos with a monthly meeting on top. Sales continues to manage its own forecast. Operations continues to run its own plan. Finance continues to manage its own budget. The S&OP process becomes a coordination overhead that adds work without changing decisions.

With the right executive sponsor — ideally the CEO or COO — S&OP becomes the operating rhythm of the business. It changes how decisions are made, not just how they are reported.

The performance gap between companies with mature S&OP processes and those without is well-documented and consistently significant. But it's worth being specific about where the value comes from, because “better planning” can feel abstract until you trace it to a balance sheet line.

S&OP is hard everywhere. It's particularly hard in the mid-market APAC context, for reasons that are worth understanding specifically rather than glossing over.

Fragmented systemsare the most common structural barrier. Most mid-market brands in Hong Kong and Australia have grown through a patchwork of ERP modules, legacy systems, and point solutions that don't talk to each other cleanly. Demand data lives in one system. Inventory lives in another. Financials in a third. Getting a single integrated view of the business for an S&OP meeting requires manual consolidation work that is time-consuming, error-prone, and never quite current. This is exactly the kind of problem that kills S&OP before it starts — when the data preparation takes two weeks, the monthly cadence becomes unsustainable.

Rapid growth complexitycompounds the problem. APAC brands that have scaled quickly — through new channels, new geographies, or new product lines — often find that their planning processes haven't kept pace with their operational complexity. What worked when you had three SKUs and two suppliers doesn't work when you have 300 SKUs, five sourcing markets, and direct-to-consumer channels running alongside wholesale. The volume and complexity of the S&OP inputs multiplies, but the process infrastructure stays the same.

Multi-channel complexitycreates a specific forecasting challenge. Brands selling across retail, wholesale, e-commerce, and marketplace channels often have fundamentally different demand patterns on each channel — different lead times, different minimum order quantities, different promotional cadences. Aggregating these into a coherent S&OP plan requires channel-level planning discipline that most mid-market companies haven't built yet. The result is a “blended average” forecast that is wrong for every channel simultaneously.

At Atelier Supply Co, we design and implement S&OP processes for mid-market brands in Hong Kong and Australia. Our approach is deliberately practical — we are not selling a 3-year transformation programme, and we are not prescribing a particular software platform before we understand your business.

The work follows four phases:

Phase 1: Maturity Assessment

Before designing anything, we assess where you actually are. This means understanding your current planning processes, your data infrastructure, your organisational dynamics, and your S&OP history (including any prior attempts that didn't stick). We score you against five maturity dimensions: process design, data integration, cross-functional alignment, executive engagement, and decision-making quality.

The assessment tells us where the biggest gaps are, which gaps are process problems versus technology problems, and what the realistic path to improvement looks like for your specific organisation. It also surfaces the organisational dynamics — the inter-functional tensions, the executive priorities, the cultural factors — that will shape what kind of S&OP design is actually implementable.

Phase 2: Process Design

We design the S&OP process around your business — its scale, complexity, planning horizon, and organisational structure. This includes defining the meeting cadence and attendees, the data flows and preparation responsibilities, the decision escalation path, and the metrics that will tell you whether the process is working.

Critically, we co-design the process with your team rather than imposing a template. S&OP processes that aren't owned by the people who have to run them don't survive the first quarter after the consultant leaves.

The process design is closely connected to your supply chain network decisions. Companies managing nearshoring transitions or multi-market sourcingneed S&OP processes that can handle the additional planning complexity those strategies introduce.

Phase 3: Tool Selection (If Needed)

Once the process is designed, we assess whether your current technology infrastructure can support it. Sometimes it can — a well-structured ERP with the right reporting configuration is sufficient for a mid-market company running a straightforward product portfolio. Often, a purpose-built planning tool adds meaningful value by reducing the manual data consolidation burden and providing the integrated visibility that S&OP requires.

We are technology-agnostic. We will tell you honestly if we think your existing systems are adequate, rather than recommending a platform because it happens to be what we know best. And if a new tool is warranted, we apply the same rigorous selection framework we described in our guide to avoiding costly supply chain mistakes — scope before you select, avoid over-engineering, and define success metrics before you sign the contract.

Phase 4: Implementation in Phases

S&OP implementation is staged, not big-bang. We start with a simplified process that the organisation can actually run — typically a demand-supply reconciliation meeting with basic financial linkage — and add complexity as capability and confidence builds. A common failure mode is designing the “perfect” S&OP process and trying to implement it all at once. The result is a process too complex to sustain without external support, which collapses as soon as the implementation team leaves.

Sources

1. 1. Gartner Supply Chain Planning Survey 2024 — S&OP maturity benchmarks across mid-market and enterprise organisations
2. 2. Oliver Wight S&OP Benchmark Study 2024 — Cross-industry analysis of S&OP process maturity and financial impact
3. 3. IBF (Institute of Business Forecasting) — Forecast accuracy improvement data across S&OP maturity levels
4. 4. McKinsey & Company — “The case for integrated S&OP” — Operational and financial impact analysis
5. 5. Aberdeen Group — S&OP Best Practices Benchmark Report — Service level and inventory performance correlations