Strategic Management and Corporate Finance · Managing the Multi-Business Firm and Analyzing Strategic Edge

Value Chain Analysis: Primary and Support Activities

Updated 11 October 2026 · Fact-checked

Value chain analysis, proposed by Michael Porter, breaks a firm into the activities it performs to create a product or service. It splits them into primary and support activities. You study the cost and value of each activity to find where the firm can lower cost or differentiate better than rivals.

Understand Value Chain Analysis

A firm does not earn a profit from its products alone. It earns it from the many activities it performs to make and sell them. Value chain analysis looks at each of these activities separately, so you can see where value is created and where cost is wasted.

Porter divides activities into two groups. Primary activities directly create and deliver the product: inbound logistics, operations, outbound logistics, marketing and sales, and service. Support activities help the primary ones work: firm infrastructure, human resource management, technology development and procurement.

The idea behind it: a customer pays a price. The firm's activities cost something. The difference is the margin. A firm gains an edge if it performs activities at lower cost than rivals (cost advantage), or performs them in a way the customer values and will pay more for (differentiation advantage).

Think of a Pune-based two-wheeler maker. Its edge may come from cheap, steady parts supply (procurement), a lean assembly line (operations), or a strong dealer service network (service). Each is a link in the chain. Weakness in one link can cancel strength in the others.

Value chain analysis looks inside the firm. It is also linked to the firm's wider value system, which includes suppliers, distributors and buyers. Its link to the resource-based view is that the activities it exposes are where a firm's valuable capabilities sit.

Key rules to remember

Margin in the value chain: Margin = Total value (price customers pay) − Total cost of all value activities; Porter's idea: a firm is profitable when the value it creates exceeds the cost of performing its activities.
Primary activities (5): Inbound logistics → Operations → Outbound logistics → Marketing and sales → Service; These are directly involved in creating, selling and supporting the product. Learn the order.
Support activities (4): Firm infrastructure + Human resource management + Technology development + Procurement; They support all primary activities and the chain as a whole. Infrastructure covers general management, planning, finance, legal and quality systems.
Sources of advantage: Cost advantage = performing activities at lower cost; Differentiation advantage = performing them uniquely so buyers pay a premium; Link the two sources to Porter's generic strategies when writing your answer.

How to solve Value Chain Analysis questions

Use this method for any question that asks you to analyse a firm's value chain or explain how it creates an edge.

1Define value chain analysis in one or two lines and name Porter as the source.
2List the primary activities and the support activities of the firm in the case, mapping facts from the case to each activity.
3For each activity, say what the firm does and how it affects cost or customer value.
4Identify the activities that are strengths and those that are weak, using facts from the case.
5Decide whether the edge is cost leadership, differentiation, or both, and say which activities drive it.
6Look at linkages between activities, for example how better procurement lowers operations cost.
7Recommend action: cut cost in some activities, strengthen others, outsource or redesign.
8Conclude in one line on how the firm can sustain its advantage.

Quickest way: Five plus four, then cost or value

When to use it: Use it when time is short and the question is a short case or a direct 'explain' question.

Write the five primary activities in order, then the four support activities, in one line each.
Attach one fact from the case or one example to each activity that matters.
Mark each as cost lever or value lever.
Write the conclusion: the edge is cost, differentiation, or both.
Add one line on linkages or on the difference from the supply chain if the question hints at it.

Common mistakes in Value Chain Analysis

Putting procurement or HR in the primary activities.
These feel like core functions of a business, so students treat them as direct activities.
Fix: Remember that procurement, technology, HR and infrastructure are the four support activities. Only the five logistics-to-service activities are primary.
Listing the activities without applying them to the case.
Students memorise the diagram and write it out as theory.
Fix: Tie every activity to a fact from the case and state its effect on cost or value.
Confusing value chain with supply chain.
Both use the idea of a flow of activities.
Fix: The value chain is a firm's internal activities viewed for cost and value creation. The supply chain is the network of suppliers, manufacturers and distributors that moves goods to the customer, focusing on flow and efficiency.
Ignoring linkages between activities.
Students treat each activity as separate.
Fix: Show at least one linkage, for example better inbound quality control reducing rework in operations.
Stopping at analysis with no conclusion on advantage.
Students forget the purpose of the tool.
Fix: End by stating whether the firm gains cost or differentiation advantage and how it can improve.
Treating service as only after-sales complaints.
The word suggests a narrow meaning.
Fix: Service includes installation, training, repair and spare parts, all of which add customer value after the sale.

Worked examples

Example 1

Name and explain the primary and support activities in Porter's value chain. Give an example of each primary activity for a packaged-food company such as an Indian biscuit manufacturer.

Show the solution

State that Porter's value chain splits a firm's activities into primary and support activities.
Inbound logistics: receiving, storing and handling inputs, such as wheat flour, sugar and packaging stored in a controlled warehouse.
Operations: converting inputs into the final product, such as mixing, baking and packing biscuits.
Outbound logistics: storing and distributing finished goods, such as sending cartons to distributors and retailers.
Marketing and sales: making buyers aware and enabling purchase, such as advertising, pricing and trade schemes.
Service: support after sale, such as handling quality complaints and replacing damaged stock.
Support activities: procurement of inputs, technology development such as better baking processes, human resource management such as training of plant staff, and firm infrastructure such as finance, planning and quality systems.

Answer: There are five primary activities (inbound logistics, operations, outbound logistics, marketing and sales, service) and four support activities (procurement, technology development, human resource management, firm infrastructure). The biscuit examples above show how each applies.

Example 2

Ganga Appliances makes water purifiers in Gujarat. Its component costs are high because it buys in small lots from many vendors. Its factory is efficient and its service engineers are well trained. Use value chain analysis to advise the firm.

Show the solution

Map the facts: procurement is weak (small lots, many vendors, high cost). Operations is a strength. Service is a strength.
Procurement is a support activity that affects the cost of every unit. Weakness here raises cost even though operations are efficient.
Advice on procurement: consolidate vendors, place larger or long-term orders, and negotiate volume discounts. This lowers cost without hurting quality.
Operations: keep the efficient factory and share its practices across lines to protect the cost position.
Service: trained engineers give a differentiation edge through reliability and quick repair. Market this strength and consider paid service contracts.
Linkage: better procurement of quality parts may also reduce defects, which cuts service calls and lowers service cost.
Conclusion: the firm can aim for both lower cost and differentiation by fixing procurement and building on service.

Answer: Ganga Appliances should fix procurement by consolidating vendors and buying in volume, protect its operations efficiency, and use its strong service as a differentiator. This lowers cost and strengthens the premium it can charge.

Exam tips

Learn the diagram order of the five primary activities and the four support activities. Examiners often test which group an activity belongs to.
In case questions, quote facts from the case against each activity. Marks go to application, not definitions.
Always finish with the source of advantage: cost, differentiation, or both.
If the question mentions the difference from the supply chain, answer in one short paragraph with scope and focus as the points of contrast.
Add linkages where you can. It shows depth and takes only a line.

Practice questions from Managing the Multi-Business Firm and Analyzing Strategic Edge

Value Chain Analysis in other exams

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

Value Chain Analysis: frequently asked questions

What is the difference between value chain and supply chain?

The value chain looks at a firm's own activities to see where value and cost arise. The supply chain is the network of suppliers, makers and distributors that moves a product to the customer. The first is about creating advantage, the second about flow and efficiency.

What are the primary and support activities in Porter's value chain?

The primary activities are inbound logistics, operations, outbound logistics, marketing and sales, and service. The support activities are firm infrastructure, human resource management, technology development and procurement.

How does a firm use value chain analysis to gain a cost advantage?

It finds activities that are costly or wasteful and redesigns, outsources or improves them. It also looks at linkages, since better work in one activity can lower cost in another. The aim is to perform activities at a lower cost than rivals.

How is value chain analysis linked to differentiation?

A firm differentiates by performing activities in ways that buyers value, such as faster delivery, better quality or strong after-sales service. The analysis shows which activities can create that value and whether buyers will pay a premium for it.