A right-sized S&OP process for small manufacturers

Sales and operations planning, usually called S&OP, has a reputation for being a heavy corporate process with long meetings and complex software. For a small manufacturer, it does not need to be. At its core, S&OP is a regular conversation that makes sure sales, purchasing and production are working from the same plan. This article describes a version that fits a small team.

What S&OP is for

Without a shared plan, each part of the business makes its own assumptions. Sales expects a big order to land. Purchasing buys for last quarter’s demand. Production schedules whatever is urgent this week. The result is shortages, overtime and excess stock, often all at once.

S&OP fixes this by agreeing on one demand plan each month and checking that supply can support it. Professional bodies such as ASCM describe S&OP in more detail, but the basic idea is simple: plan together, decide together and review together.

Who should attend

In a small business, the group can be very small:

• The owner or general manager, who makes the final decisions
• Someone from sales or customer service, who knows what customers are asking for
• The person responsible for purchasing and planning
• The production or operations lead

Four or five people are plenty. The meeting fails if the people who can make decisions are not in the room.

What to bring

Keep the inputs simple and consistent from month to month:

• Last month’s actual sales or shipments compared with the plan
• The demand outlook for the next three to six months, by product family
• Open purchase orders and any known supplier problems
• Production capacity and any constraints, such as a machine down or a staff shortage
• Inventory levels for key product families

Work at the product family level, not item by item. The goal is to agree on the overall direction; the planner can translate it into item-level orders afterwards.

A five-step monthly agenda

1. Review last month

Compare the plan with what actually happened. Where were the biggest gaps, and why? Keep this short and focused on learning, not blame.

2. Update the demand plan

Sales shares what it expects for the coming months. Discuss any large orders, new customers or lost business, and agree on one number per product family.

3. Check supply

Purchasing and production check whether they can support the plan. Flag any parts with long lead times, single suppliers or tariff exposure.

4. Resolve gaps

Where demand and supply do not match, decide what to do: build ahead, add a shift, expedite a part, or tell a customer about a later date. Write each decision down with an owner.

5. Confirm the plan

Finish with one agreed plan that everyone will work from until the next meeting.

Common mistakes

• Too much detail: discussing individual parts turns a one-hour meeting into a three-hour one.
• No decisions: if the meeting only shares information, it is a report, not S&OP.
• Skipping months: the process works because it is regular. A missed month means the next one starts from scratch.
• Waiting for software: a shared spreadsheet is enough to start. Software can come later if the process proves its value.

How it connects to inventory planning

S&OP sets the direction, and inventory rules carry it out. If your safety stock and reorder points are out of date, even a good plan will produce shortages. Our guides to the safety stock formula and reorder point formula explain those rules, and inventory optimization consulting describes how we update them.

Getting started

Start with three months of meetings, using the agenda above and a simple spreadsheet. After three cycles, review what is working and adjust. If you would like help designing the template and running the first meetings, we can scope that with you. As always: free call first, scope agreed before we start.

For the full hiring guide, visit our supply chain consulting page.

Frequently asked questions

How long should the S&OP meeting take?

For a small manufacturer, aim for about an hour. If it regularly runs longer, the discussion has probably drifted into item-level detail that belongs elsewhere.

What if sales cannot give us a forecast?

Start with history. Use the last few months of actual sales by product family as a baseline, and ask sales only to flag what they expect to be different. Over time the forecast will improve as people see it being used.

Do we need special software for S&OP?

No. A shared spreadsheet with a consistent layout is enough to begin. Many small businesses run S&OP successfully for years without dedicated software.

Who should run the meeting?

Usually the owner, general manager or operations lead. The person running it must be able to make decisions or get them made quickly.