A leadership team can spend a whole offsite arguing about strategy and never notice they are answering different questions. The CFO wants to know whether to keep the loss-making division. The product lead wants to know how to beat a cheaper rival. The head of marketing wants to know what the next campaign is for. All three call it "strategy," and all three are right, because strategy lives on three levels, and the levels do not interchange.

The quick version

  • Corporate strategy decides the scope of the whole company, which markets and businesses to be in, and why the company is worth more as a group than as separate parts.
  • Business-unit strategy decides how to win in one specific market, the basis on which a single division competes against its rivals.
  • Functional strategy decides how each function, marketing, operations, finance, people, technology, operates so that, together, they deliver the way the business chose to win.
  • The levels must point the same way. Most "strategy" failures are really alignment failures: a brilliant choice at one level quietly contradicted at another.

The idea in depth

The three-level model is one of the oldest stable ideas in strategy, and it has held up because it maps cleanly onto how companies are actually built. The standard textbook framing comes from Gerry Johnson, Kevan Scholes and Richard Whittington's Exploring Corporate Strategy, which sets out the levels plainly: corporate-level strategy is concerned with the overall scope of an organisation and how value is added to its constituent businesses; business-level strategy is about how the individual businesses should compete in their markets; and functional strategy is about how the component parts deliver the corporate and business-level strategies in terms of resources, processes and people (Johnson, Scholes & Whittington).

Corporate: which game are we playing?

Corporate strategy is the parenting question. It is not about beating a competitor in a single market, it is about which markets the company should be in at all, and what justifies holding them under one roof. Michael Porter put the test sharply in his 1987 Harvard Business Review article "From Competitive Advantage to Corporate Strategy": a diversified company has two levels of strategy, competitive (business-unit) and corporate, and a corporate strategy only earns its keep if the businesses are genuinely better off together than apart. He offered three screens for any new business: it must be attractive (or capable of becoming so), affordable on a sane cost of entry, and it must make either the new unit or the existing portfolio measurably better off.

The evidence behind that argument is the part leaders tend to forget. Porter studied the diversification records of 33 large, prestigious US companies over 1950–1986 and found they had divested far more of their acquisitions than they kept, more than half of acquisitions in new industries, and a higher share still in genuinely unrelated fields, were later sold off or shut down. In other words, the most common corporate-strategy move of the era, buy your way into adjacent and unrelated businesses, mostly destroyed value. So the move is: before any acquisition or new-market bet, write down in one sentence why the company will own this business better than anyone else would. If you cannot, you have a shopping list, not a corporate strategy.

Corporate strategy is not "what businesses could we run?" It is "what businesses are worth more under us than under someone else?"

Business unit: how do we win here?

Drop down a level and the question changes completely. Inside one market, against named rivals, how does this division win? This is the level most managers mean when they say "strategy," and it is where competitive choice lives, broadly, the choice Porter framed elsewhere between competing on cost and competing on differentiation, narrowed to a clear target customer. Roger Martin sharpens the same idea in Playing to Win (Lafley & Martin, 2013) as a paired choice: where to play and how to win are useless apart and only mean something together.

So the move is: for each business unit, force a single sentence of the form "We win [which customers] by being [better at what] than [which rivals]." If the sentence could be true of every competitor, it is a positioning statement, not a strategy, go back and cut something out. Strategy is as much about what you deliberately will not do as what you will.

Functional: does the engine deliver it?

The third level is where strategy either becomes real or quietly dies. Functional strategy is the set of choices inside marketing, operations, finance, people and technology, and its only job is to serve the level above. A business that has chosen to win on premium service cannot run a procurement function optimised purely for lowest unit cost; the two choices fight, and the customer feels it. This is the deep reason Alfred Chandler's 1962 study Strategy and Structure still gets quoted as "structure follows strategy": Chandler showed that as firms like DuPont and General Motors changed what they competed on, they were forced to redesign how they organised to deliver it (Chandler, 1962).

So the move is: take your business unit's "how we win" sentence into each function's planning and ask one question, "what would this function do differently if that sentence is true?" If the answer is "nothing," either the function is mis-aligned or the strategy is too vague to bite.

Where this breaks down

The model is a map, not the territory, and it has two honest limits. First, the neat three-tier picture assumes a company tidy enough to have distinct business units; in a single-product startup the corporate and business levels collapse into one team's head, and treating them as separate is theatre. Second, the levels are drawn as a top-down cascade, but real strategy is messier, Henry Mintzberg's research on emergent strategy showed that much of what becomes a company's actual strategy bubbles up from the front line rather than down from the plan (Mintzberg & Waters, 1985). Use the levels to keep your choices coherent, not to pretend strategy only flows one way.

flowchart TD
  C(["Corporate strategy
Which businesses?
What is the centre worth?"])
  B1(["Business unit A
How do we win here?"])
  B2(["Business unit B
How do we win here?"])
  F1(["Functions
Mktg · Ops · Fin · People · Tech"])
  F2(["Functions
Mktg · Ops · Fin · People · Tech"])
  C --> B1
  C --> B2
  B1 --> F1
  B2 --> F2
Each level answers a different question and sets the brief for the one below. Leaders Loop
flowchart LR
  Q(["Which question
are you answering?"])
  Q --> A(["Which businesses
to be in?"])
  Q --> B(["How to win in
this one market?"])
  Q --> D(["How does each function
deliver that?"])
  A --> A2(["Corporate level
Failure: a portfolio
with no logic"])
  B --> B2(["Business-unit level
Failure: a position
true of every rival"])
  D --> D2(["Functional level
Failure: functions
optimising against
the strategy"])
The fastest way to unstick a strategy argument: name which level's question is on the table. Each level has its own signature failure. Leaders Loop

A worked example

Picture a mid-sized company, "Meridian Group", all figures illustrative. It owns three businesses: a profitable B2B logistics-software unit, a small consumer fitness app picked up two years ago, and a legacy print-forms division in slow decline.

Corporate level. The board runs Porter's better-off test across the three. Logistics software clears it, the centre's enterprise sales muscle genuinely helps it. The fitness app fails it: it shares no customers, channels or capabilities with the rest, and the group adds nothing the app couldn't get from a focused owner. That is a corporate-strategy decision, and it is to divest the app, not because it's a bad business, but because it is worth more to someone else. The print division stays, but is run for cash, not growth.

Business level. Inside logistics software, the "how do we win" sentence becomes: "We win mid-market freight operators by being the easiest system to switch to, against incumbents who lock customers in." That choice, switching ease over feature breadth, is the spine everything else hangs on.

Functional level. Now the functions get their brief. Product builds one-click data migration. Sales is paid on time-to-go-live, not just contract value. Marketing leads with switching stories, not feature lists. Finance funds a free-migration offer as customer acquisition. Each function is doing something it would not do under a different "how we win." That is what alignment looks like in practice, and the moment Meridian's print division starts demanding the same growth investment as logistics, you can see the levels have been confused.

Frequently asked questions

What are the three levels of strategy?

Corporate (which businesses to be in and why the group adds value), business-unit (how a single business competes and wins in its market), and functional (how marketing, operations, finance, people and technology each operate to deliver that). They are a hierarchy of decisions, each one setting the brief for the next.

What is the difference between corporate and business strategy?

Corporate strategy is about scope, the boundary of the whole company and the logic that holds its parts together. Business strategy is about competition, how one unit beats specific rivals in one market. A company can have a strong business strategy in every division and still have no corporate strategy at all, if there is no reason those divisions belong together.

Does a single-business company have a corporate strategy?

In effect the corporate and business levels merge. The questions of scope and of how to win are answered by the same leadership team, often in the same meeting. The risk is the opposite one: small companies frequently neglect the functional level, assuming alignment happens by itself. It doesn't, it has to be designed.

Which level should a new leader focus on first?

Start one level above where you sit. A functional head who understands the business unit's way to win makes far sharper functional calls; a business-unit lead who understands the corporate logic stops fighting for resources the centre will never give. Strategy gets easier when you can see the brief you were handed.

How do the levels connect to frameworks like Five Forces or VRIO?

They sit at different levels. Five Forces mostly informs business-unit strategy (how attractive and contestable is this market), while the resource-based view and VRIO often inform corporate strategy (what we own that's worth building the portfolio around). Knowing the level tells you which tool to reach for.

Related in the Toolkit

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