S&OP: what it is, process stages and key KPIs

S&OP, or Sales and Operations Planning, is a business planning process that aligns sales, operations, logistics and finance to balance demand, capacity and profitability. Its goal is to create an agreed plan that enables companies to anticipate needs, prevent stockouts, optimise inventory and make data-driven decisions.

In many companies, sales works with one forecast, operations with another, finance with a different scenario and logistics with constraints that do not always reach the decision-making table in time. The result is often product shortages, excess inventory, operational emergencies, financial deviations and decisions that are corrected too late.

S&OP helps avoid this disconnect. It is not just a monthly meeting or a software tool: it is a management process that allows companies to build a shared view of what they expect to sell, what capacity is available to respond, what resources will be needed and what impact each decision will have on the business.

What is S&OP in a company?

S&OP stands for Sales and Operations Planning. In a company, S&OP is the process that coordinates demand forecasting with supply capacity, production, purchasing, logistics and financial objectives.

Its purpose is to create a single, agreed plan. This means that all areas work with the same information and under the same assumptions: sales understands operational limitations, operations understands commercial priorities, logistics anticipates inventory needs and finance can assess the economic impact of the plan.

A well-designed S&OP process answers questions such as:

• What demand is expected over the next few months?
• Which products, services or categories will face the greatest pressure?
• What real capacity does the company have to respond?
• What inventory will be needed?
• What risks exist in purchasing, production, transport or service?
• What impact will the plan have on revenue, margin and cash flow?

For this reason, S&OP should not be understood as an isolated planning exercise. It is a business coordination system that connects strategy, operations and execution.

Why is S&OP essential?

S&OP is essential because it allows the company to anticipate rather than react too late. In markets with changing demand, cost pressure, logistics constraints and demanding customers, planning by department is no longer enough.

It aligns sales, operations, logistics and finance

Each area has its own objectives. Sales wants to increase revenue, operations seeks efficiency, logistics needs visibility and finance requires profitability. Without a common process, each department may optimise its own area while damaging the overall result.

S&OP creates a structured space to review data, align priorities, resolve conflicts and make shared decisions.

It reduces stockouts and excess inventory

Poor planning often creates two opposite problems: lack of product when demand grows or excess inventory when the forecast is wrong.

Stockouts lead to lost sales and a deterioration in service levels. Excess inventory ties up capital, increases storage costs and raises the risk of obsolescence. With S&OP, the company can better adjust inventory, capacity and expected demand.

It improves demand forecasting

Demand forecasting should not be based only on sales history. It should also consider commercial campaigns, seasonality, launches, market changes, customer behaviour and internal constraints.

S&OP makes it possible to enrich the forecast with information from different areas. As a result, the forecast stops being an isolated figure and becomes a hypothesis that is reviewed and validated on a recurring basis.

It enables decision-making based on data and scenarios

A good planning process does not aim to predict the future perfectly, but to prepare the company for different scenarios.

What happens if demand grows more than expected? What if a supplier is delayed? What is the impact of increasing inventory? What if a product line reduces its margin?

S&OP helps compare alternatives before the problem reaches daily operations.

It connects operational planning with financial objectives

A commercial forecast is not enough if it is not translated into capacity, inventory, purchasing, costs and margin. Likewise, a financial objective is not realistic if it ignores operational limitations.

S&OP acts as a bridge between both worlds: it validates whether commercial objectives are feasible, whether operations can support them and whether the expected result is consistent with the financial strategy.

Stages of the S&OP process

The S&OP process is usually organised into recurring cycles, typically monthly. Although each company can adapt it to its own reality, there are common stages that help turn scattered data into executive decisions.

1. Data collection and cleansing

The first stage consists of gathering reliable information on sales, demand, inventory, orders, capacity, purchasing, production, logistics and financial results.

At this point, it is essential to clean duplicate, incomplete or contradictory data. An S&OP process based on unreliable information will end up producing plans with little practical value.

The most common data includes:

• Sales history
• Pending orders
• Available inventory
• Commercial forecasts
• Production or operational capacity
• Supplier lead times
• Supply constraints
• Logistics costs
• Recent financial results

The objective is not to accumulate data, but to build a common basis for planning.

2. Demand forecasting

In this stage, the company estimates the demand it expects over the coming months. This combines statistical models, sales history, commercial knowledge, planned campaigns, seasonality and possible market changes.

The forecast can be reviewed by product, family, channel, customer or region, depending on the level of detail required. A good forecast is not one that is always right, but one that makes it possible to identify risks, biases and deviations early enough.

3. Supply, inventory and capacity review

Once expected demand has been defined, the company must check whether it can respond to it.

This stage analyses production capacity, material availability, supplier constraints, warehouse space, transport, human resources, inventory levels and any other factor that affects execution.

The key question is: can we meet the demand plan with the resources available?

If the answer is no, alternatives must be proposed: increasing capacity, adjusting inventories, prioritising products or customers, reviewing deadlines, finding alternative suppliers or modifying commercial campaigns.

4. Pre-S&OP meeting

The pre-S&OP meeting is used to reconcile differences between demand, supply, operations and finance before decisions are escalated to management.

For example, sales may forecast an aggressive campaign, but operations may detect that there is not enough capacity. Finance, in turn, may point out that increasing inventory could compromise cash flow.

The aim of this meeting is to prepare clear scenarios, constraints and proposals for the executive meeting.

5. Executive S&OP meeting

The executive meeting is where final decisions are made. It involves managers with the authority to approve priorities, investments, commercial adjustments or operational changes.

This is where issues are validated such as the approved demand plan, critical constraints, supply priorities, required investments, accepted risks and financial impact.

6. Follow-up and continuous improvement

The process does not end when the plan is approved. It is necessary to measure its execution, compare actual results with what was planned and detect deviations to improve the next cycle.

Stage	Objective	Owners	Output
Data collection	Build a common basis	Planning, IT	Validated data
Demand forecasting	Estimate future demand	Sales, marketing, planning	Reviewed forecast
Supply review	Validate capacity and inventory	Operations, purchasing, logistics	Supply plan
Pre-S&OP	Reconcile constraints and scenarios	Area managers	Scenarios and proposals
Executive meeting	Approve key decisions	Management and functional leaders	Agreed plan
Follow-up	Measure execution and deviations	Areas involved	Continuous improvement

What is an S&OP indicator?

An S&OP indicator or KPI is a metric used to assess the performance of the planning process. Its purpose is not just to measure, but to help make better decisions.

Not all data points are good indicators. A useful KPI must be linked to a decision. For example, knowing forecast accuracy helps improve demand forecasting; measuring stockouts helps review inventory or supply; analysing plan adherence helps detect gaps between planning and execution.

A good S&OP indicator should meet three conditions:

1. It should be understandable for the areas involved
2. It should be linked to a business objective
3. It should enable actionable decisions

Measuring too many KPIs can be just as problematic as measuring none. The key is to select indicators that help balance demand, supply, service and profitability.

KPIs used in S&OP

S&OP KPIs should cover different dimensions of the process: demand, inventory, service, capacity and finance. The selection will depend on the sector, operational complexity and the company's level of maturity.

Demand KPIs

• Forecast accuracy: measures the degree of alignment between expected demand and actual demand.
• Forecast bias: identifies whether the company tends to overestimate or underestimate demand.
• Demand variation: analyses relevant changes compared with previous periods.
• Commercial plan adherence: measures whether actual sales are aligned with the approved plan.

Inventory KPIs

• Inventory turnover.
• Days of inventory.
• Stock coverage.
• Obsolete inventory.
• Excess inventory.

Service KPIs

• Service level.
• OTIF: orders delivered in full and on time.
• Stockouts.
• Backorders.
• Lost sales.

Capacity and operations KPIs

• Capacity utilisation.
• Production or supply plan adherence.
• Lead time.
• Operational productivity.
• Available capacity versus expected demand.

Financial KPIs

• Expected margin versus actual margin.
• Inventory cost.
• Logistics cost.
• Lost sales due to lack of availability.
• Impact on cash flow.
• Profitability by product, channel or customer.

Area	Recommended KPI	What it helps decide
Demand	Forecast accuracy	Improve demand forecasting
Demand	Forecast bias	Correct recurring deviations
Inventory	Inventory turnover	Adjust stock levels
Inventory	Days of inventory	Control tied-up capital
Service	OTIF	Assess customer fulfilment
Service	Stockouts	Prevent lost sales
Operations	Capacity utilisation	Detect bottlenecks
Operations	Plan adherence	Measure real execution
Finance	Expected vs. actual margin	Validate profitability
Finance	Operating cash flow	Anticipate financial needs

Roles involved in an S&OP process

S&OP is cross-functional. Its value depends on having the right areas involved and on each one contributing relevant information to build a realistic plan.

General management validates priorities, resolves conflicts and ensures that the process is aligned with the strategy. Sales and marketing provide knowledge about customers, campaigns, commercial opportunities and revenue forecasts. Operations and production analyse whether the company has the capacity to execute the plan. Purchasing and supply assess material availability and supplier lead times. Logistics anticipates storage and transport needs. Finance assesses the economic impact of the plan on margin, costs and cash flow. Planning coordinates the process and consolidates information.

Differences between S&OP, IBP, MRP and S&OE

Process	Horizon	Main objective	Decision level
S&OP	Medium term	Balance demand, capacity, supply and finance	Tactical-executive
IBP	Medium-long term	Integrate business, financial and strategic planning	Strategic
MRP	Short-medium term	Calculate material and production requirements	Operational
S&OE	Short term	Adjust daily or weekly execution	Operational

S&OP sits between strategy and execution. It does not go down to the daily detail of every order, but it also does not remain at the level of general objectives. Its value lies in translating strategy into a viable, measurable and shared plan.

What are the 4 types of supply chain?

From a planning perspective, four useful models can be distinguished to understand how S&OP should be adapted.

1. Efficient supply chain: minimises costs and optimises resources. Common with stable products, predictable demand and tight margins. S&OP should prioritise efficiency, inventory turnover and cost control.
2. Agile supply chain: prioritises response capacity to rapid changes. Common in fashion, electronics or products with short life cycles. S&OP should work with scenarios, capacity flexibility and frequent forecast revisions.
3. Flexible supply chain: combines efficiency and agility to adapt to variable demand. S&OP should balance inventory, capacity and operational constraints.
4. Resilient supply chain: prioritises the ability to withstand disruptions or sudden changes. S&OP should incorporate risk analysis, contingency plans and supplier diversification.

Common mistakes when implementing S&OP

Implementing S&OP is not just about creating a monthly meeting or designing a dashboard. To work, the process must have method, reliable data, leadership and real decision-making capacity.

One of the most common mistakes is turning it into a meeting with no decisions. If decisions are not made about demand, capacity, inventory, priorities or risks, the process loses value.

Another common mistake is working with unreliable data. If sales, operations and finance do not share a single version of the information, it will be difficult to build an agreed plan.

It is also common not to involve finance. In that case, the process may focus too much on units, volumes or capacity, without assessing margin, costs, investment or cash flow.

Finally, many companies fail by measuring too many KPIs or measuring the wrong ones. It is better to select a few relevant indicators that make action possible. S&OP should serve decision-making, not just reporting.

How to start implementing S&OP in your company

Not every company needs to start with a complex process. What matters is creating a solid foundation and evolving progressively.

The first step is to diagnose the starting point: how the demand forecast is prepared, what data is used, how inventory decisions are made, what conflicts arise between areas and what problems are repeated every month.

It is then useful to define responsibilities and a calendar. Each stage should have owners, participants and clear dates. A monthly cycle may include data review, forecast, supply analysis, pre-S&OP meeting, executive meeting and follow-up of agreements.

At Cymara we can help you analyse your current situation, identify planning inefficiencies, define relevant indicators and design an S&OP model adapted to the reality of your company.

Do you want to implement or improve your S&OP process? Contact Cymara and we will help you build a more integrated, reliable and results-oriented planning system.

Frequently asked questions about S&OP

What is S&OP in a company?

S&OP in a company is a planning process that aligns sales, operations, logistics and finance to create a common plan. Its objective is to balance expected demand with available capacity, optimise inventory, anticipate risks and improve decision-making.

What is an S&OP indicator?

An S&OP indicator is a metric used to assess the performance of the planning process. It can measure forecast accuracy, service level, stockouts, inventory turnover, operational capacity or the financial impact of the plan.

What is S&OP in logistics?

In logistics, S&OP makes it possible to anticipate inventory, storage, transport, purchasing and supply needs based on expected demand. Its objective is to improve product availability, reduce emergencies, control costs and maintain a good customer service level.

What are the 4 types of supply chain?

A common classification distinguishes between efficient, agile, flexible and resilient supply chains. The efficient model prioritises costs; the agile model prioritises speed of response; the flexible model prioritises balanced adaptation; and the resilient model prioritises the ability to withstand disruptions or sudden demand changes.