S&OP Cadence Playbook

Problem

Most mid-market manufacturers run S&OP as a monthly status meeting where everyone reports what happened last month. That is not S&OP — it is a postmortem. When sales, production, and finance are working from different numbers, the result is chronic overproduction in some categories and stockouts in others, excess overtime to chase demand signals nobody agreed on, and a planning team that spends its week reconciling spreadsheets instead of making decisions. A broken S&OP process costs the average manufacturer 3-5% of revenue in excess inventory and expediting costs annually.

Step-by-step approach

1. 1

   Define your five-step monthly cycle

   A real S&OP cycle has five distinct steps in sequence: data gathering, demand review, supply review, pre-S&OP reconciliation, and executive S&OP. Each step has a specific owner, a specific output, and a hard deadline within the month. Map these five steps on a calendar right now. If you cannot name the owner of each step and the output they produce, you do not have an S&OP process — you have a meeting.

2. 2

   Lock the demand review to one consensus number

   The demand review produces one number: a consensus forecast by product family for the next 12 months. Sales, marketing, and planning must agree on this number before it goes to supply. The most common failure is allowing sales to maintain a separate optimistic forecast while planning works from a different baseline. Run the demand review with a facilitated meeting, document the consensus, and make override accountability explicit.

3. 3

   Run supply review against real capacity

   The supply review takes the consensus demand plan and tests it against actual finite capacity — machine hours, labor shifts, material constraints, and supplier lead times. This is where planners identify gaps and propose scenarios: overtime, subcontracting, inventory prebuild, demand shaping. Do not present a supply plan that assumes infinite capacity. If you cannot build the plan in your current capacity, say so in the supply review and bring three options to pre-S&OP.

4. 4

   Use pre-S&OP to resolve gaps before the executive meeting

   Pre-S&OP is a working meeting — operations, supply chain, sales, and finance — that resolves the gaps between demand and supply before they reach the executive table. Every unresolved gap costs executive time and credibility. The output of pre-S&OP is a recommended plan with two or three alternatives, each with financial implications. Executives should be deciding between options, not hearing about problems for the first time.

5. 5

   Measure S&OP performance with three KPIs

   Track forecast accuracy at the product family level, schedule attainment, and inventory days by category. Review these three metrics at the start of every executive S&OP meeting. If forecast accuracy is declining, the demand review process is broken. If schedule attainment is low, the supply review is not reflecting real constraints. If inventory days are rising, demand and supply are not aligned. The metrics tell you which step in your process needs fixing.

What good looks like

Top-quartile manufacturers run S&OP in 28 days or less, with a consensus demand plan that all functions sign off on before the supply review begins. Their executive S&OP meeting is 60 minutes, decision-focused, and runs on a single set of numbers. Planners spend their time on exceptions and scenarios, not on reconciling conflicting spreadsheets from different departments.

Common failure modes

S&OP programs fail most often because the executive sponsor treats it as a supply chain initiative rather than a business process — without cross-functional ownership, sales and finance disengage within two cycles and the meeting becomes a production planning status call. The second failure is skipping the pre-S&OP step, which means executives waste their time resolving operational gaps that planners should have resolved beforehand. Third, many companies measure S&OP success by whether the meeting happened, not by whether forecast accuracy or schedule attainment improved.

This playbook is based on:

• APICS/ASCM — S&OP Body of Knowledge (2024)
• Oliver Wight — Class A S&OP Standard (2024)
• ISM — S&OP Best Practices Survey (2024)
• Anaplan — S&OP Process Guide (2024)