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Business Management · Communicating strategy; culture and structure in decision making; strategy case studies

Organisational Structure and Decision Making for IAI Actuarial

Updated 11 October 2026 · Fact-checked

Organisational structure is how a firm groups people and spreads authority. Functional, divisional, matrix and flat structures each trade off speed, control, expertise and accountability. To answer an exam question, identify the structure, link it to who decides and how fast, then judge it against the firm's situation.

Understand Organisational Structure and Decision Making

An organisational structure is the formal pattern of reporting lines, roles and decision rights in a firm. It answers three questions: who reports to whom, who can decide what, and how work is divided.

In a functional structure, people are grouped by specialism, such as underwriting, claims, actuarial, finance and sales. Expertise is deep and costs are shared. But each function looks inward, and cross-function decisions rise to the top, which can slow them down. It suits a single product or a small firm.

In a divisional structure, the firm is split by product, market or region, for example life, general and health divisions. Each division holds most of the functions it needs. Decisions are closer to the customer and each division is accountable for its own results. The cost is duplicated roles, weaker sharing of expertise and possible rivalry between divisions.

A matrix structure overlays two lines of authority, for example a product line and a function. A person has two bosses. It helps with complex projects and shares expertise, but it can cause conflict, slow decisions and unclear accountability. A flat structure has few management layers and wide spans of control. Decisions are fast and communication is direct, but managers can be overloaded and career steps are limited.

A separate idea is centralised versus decentralised decision making. Centralised means key decisions sit at the top, which gives consistency and tight control. Decentralised means they are pushed down, which gives speed and local knowledge. In an insurer, pricing philosophy, risk appetite and capital are usually central. Claims handling and local distribution are often decentralised. No structure is best in itself. The right one depends on strategy, size, risk, regulation and the skills available.

Key rules to remember

Span of control
Span of control = number of direct reports per manager
A wide span gives fewer layers and a flatter structure. A narrow span gives tighter supervision but more layers.
Structure fit rule
Best structure = the one that fits strategy, size, environment and risk
This is a judgement rule, not a calculation. Always justify with the case facts.
Decision trade-off
Centralised: more control and consistency, less speed. Decentralised: more speed and local fit, less control.
Use as a frame for any structure question. It is a general tendency, not always true.
Matrix reporting
Matrix = functional line + product (or project) line, dual reporting
State both lines of authority when you describe a matrix.

How to solve Organisational Structure and Decision Making questions

Use the same sequence for any question on structure and decision making, whether it is multiple choice or a written case.

  1. 1Identify the structure in the case: functional, divisional, matrix, flat or a hybrid. Quote the clue, such as grouping by product or two reporting lines.
  2. 2State who holds decision rights: the top, the middle or the front line.
  3. 3Link structure to speed and quality of decisions. Speed depends on layers and approvals. Quality depends on expertise and local knowledge.
  4. 4Cover control and accountability: who is answerable for results, and where conflicts or duplication arise.
  5. 5Match to context: strategy, firm size, product complexity, regulation and risk. Insurers need strong control over capital and pricing.
  6. 6Weigh advantages against disadvantages and reach a clear view.
  7. 7Recommend a change or safeguard, such as clear decision rights, a central risk function or escalation rules.
  8. 8Tie the answer back to the scenario and the people named in it.

Quickest way: Structure, Speed, Control, Fit

When to use it: Use for multiple-choice questions and for planning a written answer in the first minute of a short case.

  1. Name the structure from the grouping or reporting clue.
  2. Write one point on speed and one on control.
  3. Add one point on fit with the firm's situation.
  4. Give a verdict in one sentence.

Common mistakes in Organisational Structure and Decision Making

  • Listing advantages and disadvantages with no link to the case.

    Students memorise textbook lists.

    Fix: Use at least two facts from the scenario, such as the firm's size, products or regions, in every answer.

  • Confusing functional with divisional structure.

    Both split the firm into units.

    Fix: Functional groups by what people do. Divisional groups by what the unit sells or where it operates.

  • Saying a matrix structure is always best or always bad.

    Students overstate one side of the trade-off.

    Fix: Say it suits complex, multi-product work if roles are clear, and fails when dual authority is unmanaged.

  • Treating flat as automatically faster and better.

    Fewer layers sounds efficient.

    Fix: Mention wide spans, manager overload and weaker control, which matter in a regulated insurer.

  • Mixing up structure with decision-making style.

    Centralisation and structure type are taught close together.

    Fix: Treat them separately. A divisional firm can still centralise pricing or capital decisions.

  • Ending without a recommendation.

    Students run out of time after describing.

    Fix: Reserve the last minutes for a one or two line verdict that answers the question asked.

Worked examples

Example 1

An Indian insurer has separate life, general and health divisions, each with its own underwriting, claims and sales teams. The CEO notices that actuarial and risk skills are duplicated and that customers holding policies in two divisions are served twice. Explain the effect of this structure on decision making and suggest one improvement. (6 marks)

Show the solution
  1. Identify: this is a divisional structure, grouped by product, with functions repeated in each division.
  2. Speed: each division can decide on its own products, pricing and claims without waiting for head office, so decisions are quicker and closer to customers.
  3. Quality: divisional managers know their product well, so decisions are well informed. But expertise is spread thin and duplicated.
  4. Control: accountability for results is clear by division. The risk is rivalry and inconsistent standards, and no one owns the cross-selling customer.
  5. Fit: the structure suits distinct products, but the insurer needs group-wide control of capital and risk.
  6. Improvement: centralise shared functions such as actuarial, risk and customer data, and keep product decisions in the divisions.

Answer: The divisional structure gives fast, well-informed product decisions and clear accountability. It causes duplication and poor customer coordination. Centralising shared services such as actuarial and risk, while leaving product decisions with the divisions, would keep the speed and cut the duplication.

Example 2

A multiple-choice question asks: which is the main disadvantage of a matrix structure? Options: A. Lack of specialist knowledge. B. Unclear authority because staff report to two managers. C. Too many management layers. D. No accountability for profit in any unit. Choose the correct answer and explain.

Show the solution
  1. Recall that a matrix overlays two reporting lines, for example function and product.
  2. Test A: matrix actually shares specialist knowledge, so A is not its main weakness.
  3. Test C: layers are a feature of tall hierarchies. A matrix does not mainly add layers.
  4. Test D: accountability can be blurred in a matrix, but it is not absent. D overstates it.
  5. Test B: dual reporting leads to conflicting instructions and unclear authority. This is the classic weakness.

Answer: B. Dual reporting creates unclear authority and possible conflict between managers.

Exam tips

  • Always anchor your answer in the case facts. Generic lists earn few marks in the written section.
  • Use the pairs speed and control, expertise and duplication, flexibility and clarity as your frame.
  • In a multiple-choice question, look for words like always or never. Structure answers are usually trade-offs.
  • For insurers, mention regulation and risk. Capital, pricing and risk appetite are usually kept central.
  • Finish with a clear recommendation. The question often asks you to evaluate.

Practice questions from Communicating strategy; culture and structure in decision making; strategy case studies

Organisational Structure and Decision Making in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Organisational Structure and Decision Making: frequently asked questions

What is the difference between functional and divisional structure?

A functional structure groups people by specialism, such as claims or finance. A divisional structure groups them by product, market or region, with each division holding most of the functions it needs. Functional gives expertise and economies. Divisional gives focus and clearer accountability.

What are the advantages and disadvantages of a matrix structure?

A matrix shares expertise across projects and products and supports coordination in complex work. Its disadvantages are dual reporting, possible conflict, slower decisions and unclear accountability. It works best when roles and decision rights are clearly defined.

Is centralised or decentralised decision making better in an insurer?

Neither is always better. Insurers usually centralise capital, risk appetite and pricing policy for control and consistency. They often decentralise claims handling and local sales for speed and local knowledge.

How should I write a structure answer in the CB3 written section?

Name the structure, explain its effect on speed, quality and control, and link each point to the case. Then weigh the points and give a recommendation. Keep paragraphs short so the marker can see each point.