IB Business Management HLTopic 2 — Organisational StructurePaper 1, 2 & 3Core idea | Key terms~10 min read
How Organisations Are Structured
An organisational structure is just the answer to two questions: who reports to whom, and who decides what. Get the vocabulary straight on this page — hierarchy, chain of command, span of control, delegation, centralisation — and the rest of Topic 2.2 becomes easy, because every chart you meet later is built from these same five ideas.
📘 What you need to know
Organisational structure sets out reporting relationships, roles and responsibilities.
Hierarchy is the ranking of positions from top to bottom. Each rank is a level.
Chain of command is the line of authority running down the organisation — it defines who reports to whom.
Span of control is how many people report directly to one manager. Narrow means more levels; wide means fewer.
Delegation passes a task and the authority to do it down the chain, but responsibility stays with the manager.
Centralised means decisions are made at the top; decentralised spreads them out.
Bureaucracy is what you get when there are many levels and heavy rules: slow decisions, lots of paperwork.
The chart, and the five words that describe it
Every organisation chart is a picture of authority. Here is a small business drawn out, with the two terms students most often confuse marked on it.
Each manager here supervises four people directly, so the span of control is four. The chain of command is three links long, from managing director to worker.
The terms in plain English
Hierarchy — the ranking from top to bottom. The higher the position, the more authority it holds. Usually senior management, middle management, then everyone else.
Levels of hierarchy — how many rungs the ladder has. Count the rows on the chart.
Chain of command — the formal line authority travels down. It tells every employee who their boss is and creates a clear communication route.
Span of control — the number of subordinates reporting directly to one manager.
Delegation — giving a subordinate a task plus the authority to complete it. It frees the manager’s time and develops the employee, but the manager is still accountable if it goes wrong.
Bureaucracy — many levels plus heavy rules. Decisions crawl, and messages get distorted on the way down.
Learn this one line and you will never mix them up again: the chain of command goes down the page, the span of control goes across it.
Narrow spans and wide spans
These two are linked. If a business has a fixed number of employees, a narrow span forces more layers of management. A wide span means fewer layers, because each manager is looking after more people.
A wide span only works if staff are trained and trusted. Give a wide span to a team of brand new employees and they will not get the support they need.
🤔 Why a wide span is not simply “better”
Wide spans look cheaper — fewer managers on the payroll. But each manager now has more people to supervise, so each employee gets less attention, less feedback and less training. That is fine for experienced, self-motivated staff doing routine work. It is risky in a hospital, a construction site or a business full of trainees, where mistakes are expensive. The right span depends on how skilled the staff are and how serious a mistake would be.
WORKED EXAMPLE
A firm has 1 managing director, 4 directors, each director supervises 4 middle managers, and each middle manager supervises 5 workers. Find the total number of employees and the levels of hierarchy. Then find the effect of removing the middle managers.
Step 1: work down the levelsmiddle managers = 4 × 4 = 16workers = 16 × 5 = 80Step 2: add them up1 + 4 + 16 + 80 = 101 employees, in 4 levelsStep 3: now delayer — remove the 16 middle managers1 + 4 + 80 = 85 employees, in 3 levelseach director now supervises 80 ÷ 4 = 20 workersSpan widens from 4 to 20; one level disappearsAt $45 000 each, the saving is 16 × 45 000 = $720 000 a year — but 20 direct reports is a lot for one person to supervise properly.
Delayering means removing a level of management, usually to cut costs and speed up decisions. The trade-off is wider spans, heavier workloads for the survivors, and fewer promotion steps for everyone below.
Who decides? Centralised and decentralised
Structure is not only about who reports to whom. It is also about where decisions get made.
Feature
Centralised
Decentralised
Who decides
Senior management at head office make most decisions.
Authority is delegated down to branches, departments or teams.
Speed
Slower — requests travel up and answers travel back down.
Faster — the person facing the problem can act.
Consistency
Strong. Every branch does things the same way, which protects the brand.
Weaker. Branches may drift apart in quality or price.
Motivation
Lower. Staff follow instructions rather than use judgement.
Higher. Real responsibility tends to motivate people.
Best when
The business is small, in crisis, or depends on a uniform customer experience.
The business is large, spread across regions, or needs to react quickly to local customers.
Watch for the word “consistency” in a case study. A fast food chain that decentralised its recipes would stop being a chain. That single point can carry a whole evaluation paragraph.
WORKED EXAMPLE
A supermarket chain lets each store manager set staffing levels and order local produce, but keeps pricing and marketing at head office. Explain this choice. [4 marks]
The decentralised part
Store managers know their own customers and rota problems, so decisions on staffing and local produce are faster and better informed than head office guessing from another city.
The centralised part
Pricing and marketing stay central because customers expect the same price and the same brand in every store. Letting stores set prices would damage trust and buying power with suppliers.
A mixed structure: local speed where it helps, central control where consistency mattersMost real businesses sit somewhere on the line between the two, not at one end.
💡 Exam tip
Count carefully. Levels of hierarchy include the bottom row of workers. Span of control counts only direct reports.
Link span and levels every time. Saying “a wider span means fewer levels” shows you understand the relationship, not just the definitions.
Use “it depends” properly. The right span depends on staff experience, the complexity of the task and the cost of a mistake.
Delegation is not the same as abdication. The manager keeps responsibility. Examiners like that point.
Centralisation is not always bad. In a crisis, or in a small firm, one decision-maker is quicker and clearer.
Bring in Topic 2.1. Restructuring changes headcount, so it belongs in a workforce planning answer too.
⚠ Common mix-ups
Chain of command is not span of control. Down the page versus across it.
“Narrow span” does not mean a small business. It means each manager supervises few people, which usually makes the business taller.
Delegation is not decentralisation. Delegation is one manager passing one task down. Decentralisation is a structural policy across the whole firm.
Levels of hierarchy are not the number of managers. They are the number of rows on the chart.
Bureaucracy is not the same as hierarchy. Every hierarchy has levels; bureaucracy is when those levels plus the rules start slowing everything down.
Delayering saves salaries but not automatically money. Redundancy payments come first, and the remaining managers may need retraining.
Up next: Reading Different Organisation Charts — tall, flat, by function, by product and by region, and how to spot which one a case study is describing.
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