S&OP vs IBP: What They Actually Mean (And Why Arguing About the Definition Is a Trap)

Forget the technical textbooks. After 15 years doing this job, including one year where it went very badly, here is the simple and concrete definition of S&OP and IBP I wish someone had given me on day one.

I covered all of this in the video below. If you prefer to read, the full breakdown continues underneath.

Nobody agrees on what S&OP and IBP actually mean

I ran a survey of 877 S&OP and IBP leaders. One of the questions was simple: what is S&OP, and what is IBP?

I got back more than 250 different definitions. And 83% of participants said that a lack of S&OP and IBP goal alignment was their single biggest challenge.

That tells you everything you need to know about the state of this topic. Same name, different meanings. Same goal, different games.

Meanwhile, the sales team still will not give you a forecast, finance still runs its own numbers, and the monthly meeting still ends without a decision.

So let me skip the textbook. Here is what I actually learned in 15 years of doing this job, including the year it went very badly.

The meeting that made me want to quit

In 2016 I moved to Australia to become S&OP manager. Moving to Australia had been a dream of mine for years. The job itself was another story.

The company was in the middle of the Coty and Procter & Gamble deal: 12.5 billion dollars, 43 beauty brands, and something like 10 different ERP systems running at once.

My first S&OP meeting was a disaster. No visibility. No leadership. Everyone talking over each other. A lot of stress in the room, and honestly a lot of stress I absorbed that was not even mine.

So I did what you are supposed to do. I got trained. Very smart people, prestigious MBA backgrounds, four hours in a room, 400 slides.

It was useless to me. Not because it was wrong, but because I could not even extract the inventory and the forecast out of my ERP. I had a beautiful theoretical framework and no data.

What actually saved me came from somewhere else. Before that role I had worked at Decathlon, a family business with a genuinely collaborative culture. I went back to what I had seen there and rebuilt the process around people instead of around the framework.

Six months later we had a great IBP meeting with the CEO fully engaged in it. We had not changed a single system. Twelve months after that I was promoted to director, mostly because the process had made me visible across the whole company.

That is the part nobody tells you. The tool was never the blocker.

Where the confusion comes from

The origin of S&OP traces back to Thomas Wallace, and his work genuinely helped a generation of practitioners. But the vocabulary has since fragmented into noise: S&OP, SI&OP, S&EO, IBP, business planning.

The honest answer to “what is the difference between S&OP and IBP” is this: IBP typically pulls more finance and more of the commercial business plan into the room. That is the substance of it.

Everything else is branding.

Which is why my actual recommendation to clients and students is often to drop both acronyms. Call it the collaborative process, or give it a business project name that means something inside your company. These terms come from an engineering mindset, and you are not trying to convince engineers. You are trying to convince a sales director and a CFO.

The distinction that does matter: three levels

Forget the acronyms and look at the planning horizons instead. Every organisation is working at three levels at once.

Operational, next 1 to 12 weeks. React quickly to changes and keep operations running smoothly. This is not S&OP. This is S&EO, sales and execution of operations.

Tactical, 3 to 12 months. Balance demand and supply across all functions. This is the actual core of the S&OP process.

Strategic, 3 months to 3 years. Align operations with the business strategy and drive priorities. New business units, new warehouses, new factories.

Once you are clear about which level you are in, most of the definitional debate evaporates. Most broken S&OP meetings are broken because three horizons are being discussed in the same hour by people who each think they are in a different one.

A definition you can actually use

Here is the version I use with my clients.

S&OP and IBP is a monthly collaborative process to align all departments: sales, supply chain, finance, marketing, operations and product. It aligns the business plan (revenue, growth, strategy) with the operational plans (supply, inventory, capacity, R&D, marketing). It balances demand and supply over the next 3 to 18 months. It connects the forecast, inventory, production and financial plan. It builds trust, visibility and alignment across the company. And it combines data, scenarios and human judgement, because AI cannot do this alone yet.

It ends with an executive meeting that aligns priorities and drives concrete actions.

The CEO should be in that meeting. And if your CEO is not in it, I will be blunt: it is because your meeting is not good enough, not business enough, not interesting enough. That is uncomfortable, but it is the most useful diagnostic I know.

The payoff, when it works: better alignment across departments, better visibility on demand and supply, smoother operations, faster reaction to change, more profitability, and considerably less firefighting.

The image that explains it fastest

You will spend more time selling this internally than running it, so you need pictures rather than definitions.

My favourite is the peloton. Ride alone against the wind and you burn 30 to 40% more energy for the same result. Ride together and everyone goes further, faster, with less effort.

A siloed team has no alignment, conflicting priorities, duplicate meetings, late information, rework, and lower results despite higher effort. A collaborative team has one plan, aligned priorities, early collaboration, shared information, faster decisions and better results with less effort.

Same people. Different formation.

Three other images I use constantly: S&OP as oil in the engine of the organisation, where the ingredients are trust, collaboration, engagement, visibility, process, tools, pragmatism and optimism. S&OP as a lighthouse, giving everyone clarity on where the company is actually heading. And the Chicago Bulls, a talented team that fought internally and lost, until it unified under a great coach and started winning championships.

And once collaboration works inside the company, extend it outside to your key clients and suppliers. That is where it starts compounding.

Where most companies actually sit

There are six levels of organisational maturity here, and the climb is measured in consistency and engagement rather than in software.

Firefighting. Basic. Organized. Aligned. Agile. Regenerative.

My estimate, based on the companies I work with, is that around 80% are still at level one. Not because they are badly run, but because nobody has ever built a basic level of structured collaboration.

The top of the ladder is the part people skip. A regenerative organisation behaves like a forest rather than a single dry tree in the desert: resilient, adaptive, able to recover on its own. That sounds abstract until you have seen a company get there.

What AI changes about this role

AI reduces manual and repetitive work, but it raises the level of expertise the job requires. That is the automation paradox, and the shift underneath it is the one to pay attention to.

We are moving from execution capacity to decision and orchestration capacity.

That is unusually good news for S&OP and IBP leaders, because orchestration is already the entire point of the role. The jobs exposed to AI are the pure execution jobs. The value rising fastest belongs to the people who run the conversation between functions.

The catch is that this profile is rare.

It requires four things at once: technical expertise, business acumen, facilitation and orchestration skills, and AI literacy. Finding all four in one person is hard, which is exactly why these roles are among the fastest growing in the field.

I saw this recently with someone I work with who became VP Supply Chain. He was an excellent facilitator and orchestrator, and he was also not afraid to build a forecasting engine himself using ChatGPT and Python. That combination is the new profile.

Where to start when it all looks impossible

Large organisation. Legacy ERP. Everyone fighting. Culture you cannot change in six weeks. I know.

To move a mountain, you start by moving small stones, one at a time. Break the complex problem into micro-steps and go step by step.

Foundation: understand and earn trust

1. Clarify the S&OP and IBP role and responsibilities
2. Assess S&OP and IBP maturity and expectations
3. Gain trust and make it contagious
4. Create structure and ownership

Execution: design and run the process

5. Kick off, or re-kick off, and build momentum
6. Consolidate data and give visibility
7. Set the right meetings, cadence and format
8. Build a clear, impactful executive deck

Scale: elevate and sustain

9. Lead efficient IBP executive meetings
10. Systemize and automate your IBP
11. Strengthen collaboration and trust
12. Go beyond S&OP and IBP

Twelve steps, but only the first one matters today. Start with the assessment, across all seven pillars, not just the process and the deck.

And notice what is not on this list: replacing your ERP. This works with SAP. It works with an AS/400. The system was never the thing standing between you and a functioning S&OP process.

Keep it simple, and bring more collaboration and trust into your organisation.

Edouard