Sales and operations planning is a monthly cycle that turns a demand forecast and a supply plan into one agreed, costed plan. It exists to stop sales, operations and finance running on three different sets of numbers, and it matters most in businesses that hold stock.
What S&OP means
Sales and operations planning is an integrated business management process. Once a month, the demand side of the business states what it expects to sell, the supply side states what it can produce or source in that window, the two are reconciled where they disagree, and the reconciled plan is costed and signed off by the executive. Everyone then works to that plan until the next cycle.
The word doing the work in that definition is reconciled. Every company already has a sales forecast and a production or procurement plan. S&OP is the discipline of forcing them to be the same number, on a fixed cadence, with a person accountable for the gap. Without it the sales team plans on one figure, operations builds to another, and finance reports a third after the fact.
Why it matters
Practically the process does four things. It stops overbuilding stock that ties up cash, it stops under-supplying demand you have already spent money to create, it gives finance a forecast with an operational basis rather than a percentage growth assumption, and it surfaces the constraint early enough that somebody can do something about it.
The cash consequence is the one founders feel first. Stock and unbilled work in progress are usually the largest trapped balances on a growing balance sheet, and stock sits there rather than in the P&L until it is sold, under the inventory measurement rules in the AASB accounting standards, so a demand plan that is systematically optimistic shows up as a cash problem months before it shows up as a reporting problem.
The downstream effect lands in the cash position, covered in how to manage cash flow in a growing business.
The S&OP cycle, step by step
The standard cycle runs five stages in a fixed order each month. The names vary between organisations; the sequence rarely does.
| Stage | What happens and what comes out of it | |
|---|---|---|
| 1. Product review | What is launching, changing or being retired | Confirms the portfolio the rest of the cycle is planning. Launches and end-of-life dates move both the demand and the supply plan, so they are settled first. |
| 2. Demand review | What the business expects to sell | An unconstrained forecast by product and period, owned by sales and marketing. Unconstrained is deliberate: capacity limits are applied at the next stage, not hidden inside the forecast. |
| 3. Supply review | What the business can actually deliver | Operations tests the demand plan against capacity, lead times, stock and supplier constraints, and names every gap it cannot close. |
| 4. Pre-S&OP | Reconciliation and costing | Finance and the functional leads resolve what they can, cost the options, and escalate only the decisions that need an executive call. |
| 5. Executive S&OP | The decision meeting | One plan is approved, with the trade-offs made explicit. If the meeting ends without a decision the cycle has failed and the gap rolls forward. |
Two details decide whether the cycle works. The first is that the executive meeting must actually decide, because a review that ends without a call simply moves the disagreement into next month. The second is that the plan has to be costed. A volume plan nobody has converted into revenue, margin and cash is an operations document, not a business one.
Where S&OP matters most, and where it does not
The value of the process scales with how physical the business is. A single-product SaaS company can sell more tomorrow without buying anything today, so its demand and supply plans barely diverge. A business holding stock is a different problem entirely. Inventory-heavy businesses selling physical goods are far harder to plan and automate, because of the number of nuances involved, legacy data issues and imperfect infrastructure, particularly at scale.[1] That complexity is precisely what S&OP is for.
It shows up in when these companies need senior finance at all. A single-product SaaS business can often run on fractional support well past the point a hardware or deep tech company can, while complex deep tech with R&D and inventory needs a proper finance owner much sooner.[2] The presence of stock is one of the clearest signals I use when a founder asks whether it is time.
That timing question is worked through in when to hire your first CFO.
Who owns S&OP in a growing company
The executive owns the decision. Somebody in finance almost always owns the process, because finance is the only function that sits across demand, supply and the money at the same time. That is a business partnering job before it is a technical one. In a financial controller brief for a stock-heavy business, the responsibilities run from management accounts, FP&A, budgeting and forecasting through working capital and cash flow to inventory and stock, and the role requires significant business partnering with operational stakeholders: the shop floor, the sales team, the service desk and spare parts.[3] S&OP is that job written down as a calendar.
What breaks it is treating finance as a scorekeeper. Finance is a commercial driver and enabler rather than a back office function, acting as the number two next to the founder or CEO helping them make decisions.[4] A finance team that only reports the variance after the cycle has closed cannot run the cycle, and if that is the team you have, the S&OP process will quietly revert to three sets of numbers within two quarters.
Common questions
What does S&OP stand for?
S&OP stands for sales and operations planning. It is a recurring management cycle, usually monthly, in which a business reconciles the demand it expects with the supply it can deliver and agrees one costed plan that sales, operations and finance all work to. One set of numbers comes out of it, rather than a sales forecast, a production plan and a finance budget that disagree.
What are the stages of the S&OP cycle?
Five, in a fixed order: a product review that settles what is launching or retiring, a demand review that produces an unconstrained sales forecast, a supply review that tests it against capacity and lead times, a pre-S&OP stage where finance costs the options and resolves what it can, and an executive meeting that makes the calls that remain. The executive stage has to actually decide, or the disagreement simply rolls into next month.
Does a software company need S&OP?
Rarely in the full form. A single-product SaaS business can serve more demand tomorrow without buying anything today, so its demand and supply plans barely diverge and a lighter forecasting cadence usually covers it. The process earns its cost when supply is physically constrained: stock, manufacturing lead times, hardware, or a services business selling finite delivery capacity.
Who should own the S&OP process?
The executive owns the decision and finance almost always owns the process, because finance is the only function sitting across demand, supply and cash at once. In practice it lands with a financial controller, a head of finance or a commercially minded management accountant. It is a business partnering role: the work is spent with operations and sales, not in the ledger, and a finance team that only reports variances after the fact cannot run it.
References
- My read on where automation lands: inventory-heavy businesses selling physical goods are very difficult, because of so many nuances, and if you have got legacy data issues or imperfect infrastructure it is very difficult, particularly at scale.
- What I see at that stage: a single-product SaaS might use fractional support until Series C, while complex deep tech with R&D and inventory needs a CFO sooner.
- From a financial controller brief written by Tom Hunter for a stock-heavy business: responsibilities span management accounts, FP&A, budgeting, forecasting, working capital and cash flow management, and inventory and stock, with significant business partnering across the shop floor, sales team, servicing desk, finance department and spare parts.
- Where I land on this: it is a commercial driver and enabler, not just a scorekeeper or back office function, acting as number two next to the founder or the CEO helping them make decisions. Tom Hunter hosts The CFO Track, a podcast of interviews with Australian CFOs and finance leaders.