What Is S&OP?

S&OP (sales and operations planning) is a management process that regularly aligns expected demand with the company's actual capacity to meet it. In practice, it brings leadership, sales, operations, and finance together around a single plan, over a rolling horizon of 18 to 24 months, to weigh what the company wants to sell against what it can produce, store, and deliver. It is a decision-making process, not just a forecasting exercise.

The S&OP cycle in 5 steps

S&OP runs in recurring cycles, most often monthly. Each cycle follows five steps.

1. Data and product review

Data from the past period is consolidated (actual sales, inventory, and forecast variances), and the product portfolio is updated: launches, discontinuations, and range changes.

2. Demand review

Sales and marketing teams build an unconstrained demand forecast: what the market is likely to absorb, regardless of capacity. This is the voice of the customer in the plan.

3. Supply review (capacity)

Operations compares this demand with available capacity: production, procurement, workforce, and inventory. Bottlenecks and possible scenarios are identified.

4. Reconciliation (pre-S&OP)

A preparatory meeting brings demand, supply, and finance together. Scenarios are costed, trade-offs are prepared, and the decisions that belong to leadership are set aside for the executive meeting.

5. Executive S&OP meeting

Leadership decides: it approves a single plan, commits resources, and settles any remaining open issues. The plan becomes the shared reference for the following period.

When does an SME need it?

An SME doesn't need a heavy setup to get started. S&OP becomes useful once sales decisions and production decisions are no longer made by the same people in the same room, which typically happens as the company grows. Typical signs: stockouts alongside unsold inventory, sales forecasts that production never sees, and trade-offs made under pressure rather than in a meeting. This is exactly the logic behind the Two-Layer Model we apply: clearly separating the decision layer (the plan approved by leadership) from the execution layer (day-to-day operations), so that the plan drives operations rather than the other way around.

The common mistake

The most frequent mistake is confusing S&OP with forecasting. Many companies produce excellent forecasts that lead to no decision at all, because there is no meeting where leadership actually decides. An S&OP process without a committed decision is just another spreadsheet. The opposite also happens: a cycle so complex that no one keeps it running. For an SME, a simple cycle that genuinely produces decisions is worth more than a sophisticated process that gets abandoned. This is the approach we take in our S&OP consulting work.

Assess your process

Wondering whether your company needs S&OP, or whether yours actually produces decisions? Our free 45-minute session assesses your planning maturity in forty-five minutes, with no commitment.