S&OP process setup: bu ne anlama geliyor
S&OP (Sales and Operations Planning) is the monthly decision process that reconciles demand with supply in a single plan. Its purpose is that sales, production, supply and finance all look at the same number.
Why most S&OP fails
Failure has one characteristic cause: the meeting produces a presentation rather than a decision. Everyone shows their own figure, the gaps are debated, nobody signs anything, and the same debate repeats next month.
The output of S&OP has to be one agreed plan with an owner.
The five-step cycle
- Product review. New products, discontinuations, lifecycle changes.
- Demand review. The statistical forecast is the starting point, enriched with what the sales team knows. Critically: every manual override must be recorded with its reason. Unexplained overrides degrade forecast accuracy over time and nobody notices.
- Supply review. Production capacity, supplier constraints, stock position. Can the demand plan be met?
- Pre-S&OP. Gaps between demand and supply are resolved here. Options and their financial impact are prepared. This is where the real work happens.
- Executive S&OP. Only decisions unresolved in pre-S&OP reach this meeting. It should not exceed 60 minutes and should end with a decision.
Three things worth measuring
– Forecast accuracy (MAPE or WMAPE) — by product group
– Plan attainment — produced / planned
– Contribution of manual overrides — did the adjustments improve the forecast or degrade it?
The third is the most-skipped and the most instructive.
Who approves what
S&OP works only when decision rights are written down. A simple framework that holds up in practice:
Demand plan — approved by the sales director, prepared by the forecasting team.
Supply plan — approved by the production or supply director.
Gap decisions — operations director in pre-S&OP; escalated to the general manager if unresolved.
Financial approval — CFO, when the plan diverges from budget.
If this list is not settled before the meeting, the meeting produces debate rather than decisions.
The single-number principle
The core rule: the company looks at one plan. If sales has its own target, production its own plan and finance its own budget living separately, S&OP has not been implemented.
That does not mean the targets must be identical — a sales target may exceed the plan. But the difference must be deliberate and visible, not buried in three separate spreadsheets.
Maturity stages
The process usually matures in this order:
1. Meeting without decision — everyone presents
2. Decision without follow-up — decisions are made, nobody checks the outcome
3. Follow-up without learning — deviations are reported, causes are not analysed
4. Learning process — forecast errors are traced to root cause and the process is corrected
Most companies stall at stage two. The only route to stage three begins with reviewing last month’s decisions at the start of every meeting.
Realistic timeline
The first cycle can be run within a month, but the process takes 6-9 months to settle. The first three months go on data quality and role clarity. Trying to compress that produces the form of the process without its function.
A decision mechanism, not a meeting
What emerges in most places that set up S&OP is a monthly meeting: everyone presents their number, it is discussed, everyone leaves. No decision is taken, because who has the authority to decide what was never written down.
Two sentences settle it: when sales and operations disagree, who decides, and above what threshold does that decision escalate. Without them the meeting is a briefing.
The one-number rule
The core output of S&OP is a single agreed plan. If the sales target, the production plan and the finance budget carry different numbers, the process is not working.
Closing that gap is itself a decision. “Everyone proceeds with their own number” is not an option on paper and is the one most often taken in practice.