FOUNDATION · PLANNING LANDSCAPE
S&OP Foundation
Sales and Operations Planning (S&OP) is a practical business conversation: what do we expect customers to need, what can we supply, and what decision should we make when those two answers do not match?
Read this guide before the detailed P2M capabilities. It explains the idea in ordinary business language first. The examples use simple numbers so the difference between a plan, a constraint, and an execution document stays clear.
THE SIMPLE MODEL
S&OP connects expectation to action
Do not begin with a transaction code. Begin with the business question and make the decision understandable to Sales, Operations, Supply Chain, and Finance.
Business expectation → Demand plan → Supply and capacity check → Agreed trade-off → Detailed ERP execution
HOW TO READ THIS FOUNDATION
Build the understanding in sequence
Start with the business idea, then define demand, test supply, expose the gap, and finally connect the agreed decision to ERP execution. Each section answers one practical question before the next one adds detail.
QUESTION 1 · THE IDEA
What is S&OP?
S&OP is a recurring management process for agreeing one realistic view of demand, supply, capacity, inventory, and financial impact. It is not simply a sales forecast, a production schedule, or an SAP document.
For example, Sales may expect 1,000 pumps next quarter. Operations may be able to make only 800 with the current shifts. Finance may show that making all 1,000 would require overtime and reduce margin. S&OP brings those facts into one decision: change capacity, change the promise, use inventory, or accept the risk.
Without S&OP: Sales, Operations, and Finance can each work with a different version of the future.
With S&OP: The business agrees one version, records the assumptions, and makes the trade-off visible.
S&OP is therefore less about producing a perfect forecast and more about making an imperfect future explicit. A plan can be changed in the next cycle; an unspoken assumption is much harder to manage.
Takeaway: S&OP is where the business agrees what it intends to do before detailed planning tries to make it happen.
QUESTION 2 · DEMAND
What might customers need?
Demand is not only confirmed sales orders. It is the best agreed view of what customers or the business are likely to need during a future period.
Inputs to demand
- Recent sales and open orders
- Customer and market knowledge
- Promotions, seasonality, and new products
- Lost sales, cancellations, and known changes
What the plan says
For April, the business expects demand for 1,000 pumps. It may not know the final customers or order dates yet, but it needs a shared quantity and timing assumption to test supply.
Different demand inputs should be discussed together, not silently added together. Open orders may already be included in a forecast, while a promotion may create demand that history cannot show. The planning team must state the period, product family, quantity, assumptions, and owner.
| Demand statement | What it means |
|---|---|
| “A customer ordered 200” | Confirmed transactional demand with a customer reference. |
| “The market may need 500” | Uncertain expectation used to test future supply. |
| “We will plan 1,000” | An agreed planning quantity for a period, pending detailed execution. |
Check your understanding: A demand plan is an agreed expectation. It is not proof that a customer order exists.
QUESTION 3 · SUPPLY
What can the business provide?
Supply is everything that can satisfy the demand: usable inventory, confirmed receipts, planned production, supplier capability, and available capacity.
Inventory
There are 200 finished pumps available and usable. Stock in quality inspection or blocked stock may not be available for the promise.
Receipts
A supplier has confirmed 300 pumps for April 10. A suggestion or an unconfirmed expectation is not the same as a committed receipt.
Capacity
The plant can make 500 more pumps in April with the current people, line time, materials, and working pattern.
Supply quantity: How many units could be available?
Supply feasibility: Can those units arrive or be produced in the required place and period?
A plan that says “500 from production” is incomplete if the line lacks hours, a component is late, or the proposed date ignores setup time. S&OP does not replace the detailed capacity or material check; it makes sure the business knows which checks matter before accepting the plan.
Check your understanding: Supply is not just a number in a plan. It must have a credible source, date, quantity, and ability to arrive or be produced.
QUESTION 4 · THE GAP
What happens when demand is greater than supply?
Compare the two views before creating more supply. The comparison exposes the decision that management must make.
1,000 pumps
The agreed April expectation.
200 pumps
Finished stock that can be used now.
800 pumps
300 supplier receipts plus 500 plant capacity.
None on paper
But only if the supplier receipt and production capacity are both credible and on time.
The same calculation can reveal a real shortage. If the plant can make only 300 rather than 500, total supply is 800 and the gap is 200. The business must then choose a response instead of hiding the shortage inside a later schedule.
Possible responses
- Add a shift, subcontract, or secure more supplier capacity.
- Use inventory or bring a receipt forward.
- Prioritize customers or change delivery timing.
- Reduce, defer, or reshape the demand assumption.
What is not a response
Changing a date in the system without changing the physical constraint. A new planned order does not create a machine hour, supplier confirmation, or finished pump by itself.
Takeaway: S&OP makes the gap discussable. It does not pretend that a plan has removed the constraint.
QUESTION 5 · ERP HAND-OFF
What does the plan become in ERP?
S&OP agrees the direction and the assumptions. Detailed ERP planning turns those assumptions into time-phased requirements and supply proposals that planners can examine and execute.
S&OP decision
“We will support April demand of 1,000 pumps. The plant will add a shift, Supply Chain will confirm the 300-pump receipt, and the business will accept the agreed inventory and margin effect.”
P2M execution
Demand signals, material settings, BOMs, routings, MRP, planned orders, purchase requisitions, production orders, confirmations, receipts, and inventory evidence make that decision operational.
| Layer | Question it answers | Typical evidence |
|---|---|---|
| S&OP | What should the business agree? | Demand, supply, capacity, inventory, financial assumptions, and decision record. |
| Detailed planning | What materials and supply proposals are needed, and when? | Requirements, MRP results, planned orders, purchase requisitions, and exceptions. |
| Execution | What was actually produced, purchased, received, or consumed? | Production orders, purchase orders, goods movements, confirmations, and inventory. |
Important distinction: S&OP does not perform detailed MRP. MRP does not decide the commercial trade-off by itself. The business decision must be clear before the system can produce a useful execution proposal.
QUESTION 6 · FOUNDATION CHECK
What should I understand before continuing?
You are ready for the P2M capability map when you can explain the following without relying on SAP terms.
Demand
What is expected, for which period, and how certain is that expectation?
Supply
What inventory, receipts, production, suppliers, and capacity can credibly respond?
Decision
What trade-off was agreed, who owns it, and what evidence will show whether it worked?
- Demand is an expectation, not automatically an order.
- Supply needs a credible quantity, date, and source.
- A shortage requires a business choice, not only a system change.
- S&OP sets assumptions; P2M turns them into detailed execution.
Now explore how demand, BOM, MRP, capacity, supply proposals, production, and inventory implement the agreed planning story.