Strategic Business Leader · Environmental issues

Industry Life Cycle and Competitor Analysis for ACCA SBL

Updated 11 October 2026 · Fact-checked

The industry life cycle describes how an industry moves through introduction, growth, shake-out, maturity and decline, and each stage calls for different strategies. Competitor analysis examines rivals' objectives, resources, strategies and strategic groups. In SBL, you identify the stage, link it to the scenario's evidence, and recommend a strategy that fits.

Understand Industry Life Cycle and Competitor Analysis

An industry life cycle is a model of how demand and competition change over time. Most industries move through stages: introduction, growth, shake-out, maturity and decline. The model is a guide, not a law. Stages vary in length, and some industries are renewed by innovation instead of declining.

Each stage changes the competitive picture. In introduction, sales are low, costs are high, and few firms compete. In growth, demand rises fast and new entrants arrive. In shake-out, growth slows and weaker firms exit or merge. In maturity, demand is steady, rivalry is intense and firms compete on price, cost and differentiation. In decline, demand falls, capacity is excess, and firms harvest, divest or find a niche.

Competitor analysis asks who you really compete with and how they will behave. Look at each rival's objectives, current strategy, assumptions, and resources and capabilities. These give you the rival's likely response to your moves. Porter calls this a competitor response profile.

Strategic groups are sets of firms in an industry that follow similar strategies or have similar characteristics, for example price level, product range, geographic reach or channel. Mapping them on two axes shows the main rivals, gaps in the market and mobility barriers that stop firms moving from one group to another. Firms in the same group are the closest competitors.

In SBL, the models are tools, not the answer. You use them to judge what the organisation should do next, and you must tie each point to the case facts.

Key rules to remember

Industry life cycle stages: Introduction → Growth → Shake-out → Maturity → Decline; Describes a typical pattern. Not every industry follows it in order or at the same speed.
Competitor response profile: Objectives + Current strategy + Assumptions + Capabilities → Likely response; Use this to predict how a rival will react to your move.
Strategic group map: Choose two strategic dimensions → Plot firms → Draw groups → Identify gaps and mobility barriers; Pick dimensions that really separate firms in the case, such as price and geographic scope.
Stage and strategy link: Stage → Demand and rivalry pattern → Fitting strategy; For example, growth favours investment and market share, while decline favours harvesting, divestment or niche focus.

How to solve Industry Life Cycle and Competitor Analysis questions

Use this method for any question on industry stage or competitors. Always link analysis to the case and end with a recommendation.

1Read the requirement and note the verb, such as assess, evaluate or recommend, and who the answer is for.
2Find evidence of the industry stage in the scenario: sales growth, number of entrants, price pressure, mergers, capacity and innovation.
3Name the stage and justify it with two or three case facts. Say if the evidence is mixed.
4State what that stage means for competition, cost, investment and risk in this industry.
5Identify the key competitors and, if useful, group them by strategy. Note the closest rivals and any gaps or mobility barriers.
6Assess rivals' objectives, strengths and likely responses using only case evidence.
7Recommend a strategy that fits the stage and the organisation's capabilities, and explain the risks.
8Write in the requested format and show professional skills by weighing evidence and stating limits of the models.

Quickest way: Stage, evidence, rival, move

When to use it: Use this when time is short and you need a structured answer in a few minutes.

Write the stage in one word, then list two case facts that prove it.
Write one line on what the stage means for competition and costs.
List the main rivals and the one or two that matter most, with the reason.
Write the recommended move and one risk.
Check each point refers to the company name or a figure from the case.

Common mistakes in Industry Life Cycle and Competitor Analysis

Listing the stages with textbook definitions and no case evidence.
Students memorise the model and treat it as the answer.
Fix: Name the stage, then quote at least two facts from the scenario that show it.
Assuming every industry moves through the stages in order.
The diagram looks like a fixed path.
Fix: State that the model is a guide. Mention that innovation or new demand can extend or restart a stage.
Choosing strategic group dimensions that do not separate firms.
Students pick generic axes without checking the case.
Fix: Choose dimensions that show real differences in the scenario, such as price, quality, range or reach.
Describing competitors but not predicting how they will respond.
Students stop at description.
Fix: Use objectives, strategy and resources to say what each rival is likely to do and what it means for the client.
Recommending a strategy that ignores the stage.
Students apply a favourite model such as growth by acquisition to every case.
Fix: Check the recommendation against the stage. Mature or declining markets suit different moves from growth markets.
Confusing the industry life cycle with the product life cycle or organisational life cycle.
The stages have similar names.
Fix: Say which one applies. Industry stage concerns the whole market, product stage concerns one product, and organisational stage concerns the firm's growth.

Worked examples

Example 1

A scenario describes a market for electric scooters. Global sales have grown fast for five years, many new firms have entered, prices are falling and two small firms have just been acquired. As an adviser, assess the stage of the industry and its implication for strategy at Zenro, an established entrant.

Show the solution

Identify stage evidence: rapid growth and many entrants suggest growth. Falling prices and acquisitions suggest the start of shake-out.
Conclude that the industry is late growth moving towards shake-out. Note the mixed evidence.
Implication: rivalry will rise, weaker firms will exit, and scale and cost will matter more.
Recommend that Zenro invests in capacity and brand while controlling costs, and considers acquiring struggling rivals.
Note a risk: heavy investment is dangerous if growth slows sooner than expected.

Answer: The industry is in late growth moving into shake-out. Zenro should build scale, protect its cost position and consider selective acquisitions, while watching the risk of over-investment if demand slows.

Example 2

Four firms in a regional bank market are described. A and B are low-price, online-only and national. C and D are high-service, branch-based and regional. A new entrant, Nivi, plans to offer premium service online nationally. Use strategic group analysis to advise Nivi.

Show the solution

Choose dimensions: price and service level on one axis, and channel and geographic reach on the other.
Group the firms: A and B form a low-price online national group. C and D form a high-service branch-based regional group.
Position Nivi: premium service online and national, which does not match either group.
Identify the gap: no firm offers premium service online across the country, so direct rivalry may be lower at first.
Assess mobility barriers: C and D would need heavy investment in digital platforms. A and B would need to build service quality and trust.
Advise: Nivi can target the gap, but must show premium service is valued and that customers will pay for it. It should watch for rivals moving into the space.

Answer: Nivi would sit in a gap between two groups. Mobility barriers give it some protection, but it needs evidence of demand for premium online service and should monitor rival responses.

Exam tips

Always name the stage and quote case facts to prove it. Marks go to application, not recall.
If the evidence is mixed, say so and explain which stage is most likely. This shows scepticism.
For competitor analysis, predict likely responses and say what the client should do about them.
Draw a simple strategic group map only if it adds value, and explain the axes in words. A list of groups with reasons also earns marks.
End each answer with a recommendation, a risk and a limitation of the model.

Practice questions from Environmental issues

Industry Life Cycle and Competitor Analysis in other exams

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

Industry Life Cycle and Competitor Analysis: frequently asked questions

What are the stages of the industry life cycle?

The usual stages are introduction, growth, shake-out, maturity and decline. Each has a typical pattern of demand, competition and profit. In SBL you must show which stage the case industry is in and why.

What is a strategic group?

A strategic group is a set of firms in the same industry that follow similar strategies or share similar characteristics. Firms in the same group are usually the closest competitors. Mobility barriers make it hard to move between groups.

How is competitor analysis used in SBL answers?

You assess rivals' objectives, strategies, resources and likely responses, then link this to the client's position. The aim is to support a recommendation, not to describe rivals for their own sake.

Does every industry follow the life cycle?

No. The model is a general guide. Some industries skip stages, last longer in one stage, or are renewed by innovation. Good answers say this and rely on case evidence.