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Porter's Five Forces Model: analysing industry structure

Author: Jim Riley  Last updated: Sunday 23 September, 2012

Overview of the Five Forces Model

Porter identified five factors that act together to determine the nature of competition within an industry.  These are the:

  • Threat of new entrants to a market
  • Bargaining power of suppliers
  • Bargaining power of customers (“buyers”)
  • Threat of substitute products
  • Degree of competitive rivalry

Porters Five Forces

He identified that high or low industry profits (e.g. soft drinks v airlines) are associated with the following characteristics:

Porter Five Forces

Let’s look at each one of the five forces in a little more detail to explain how they work.

Threat of new entrants to an industry

  • If new entrants move into an industry they will gain market share & rivalry will intensify
  • The position of existing firms is stronger if there are barriers to entering the market
  • If barriers to entry are low then the threat of new entrants will be high, and vice versa

Barriers to entry are, therefore, very important in determining the threat of new entrants.  An industry can have one or more barriers.  The following are common examples of successful barriers:

Barrier

Notes

Investment cost

High cost will deter entry
High capital requirements might mean that only large businesses can compete

Economies of scale available to existing firms

Lower unit costs make it difficult for smaller newcomers to break into the market and compete effectively

Regulatory and legal restrictions

Each restriction can act as a barrier to entry
E.g. patents provide the patent holder with protection, at least in the short run

Product differentiation (including branding)

Existing products with strong USPs and/or brand increase customer loyalty and make it difficult for newcomers to gain market share

Access to suppliers and distribution channels

A lack of access will make it difficult for newcomers to enter the market

Retaliation by established products

E.g. the threat of price war will act to discourage new entrants
But note that competition law outlaws actions like predatory pricing

What makes an industry easy or difficult to enter?  The following table helps summarise the issues you should consider:

Easy to Enter

Difficult to Enter

Common technology
Access to distribution channels
Low capital requirements
No need to have high capacity and output
Absence of strong brands and customer loyalty

Patented or proprietary know-how
Well-established brands
Restricted distribution channels
High capital requirements
Need to achieve economies of scale for acceptable unit costs

Bargaining power of suppliers

If a firm’s suppliers have bargaining power they will:

  • Exercise that power
  • Sell their products at a higher price
  • Squeeze industry profits

If the supplier forces up the price paid for inputs, profits will be reduced. It follows that the more powerful the customer (buyer), the lower the price that can be achieved by buying from them.
Suppliers find themselves in a powerful position when:

  • There are only a few large suppliers
  • The resource they supply is scarce
  • The cost of switching to an alternative supplier is high 
  • The product is easy to distinguish and loyal customers are reluctant to switch
  • The supplier can threaten to integrate vertically
  • The customer is small and unimportant
  • There are no or few substitute resources available

Just how much power the supplier has is determined by factors such as:

Factor

Note

Uniqueness of the input supplied

If the resource is essential to the buying firm and no close substitutes are available, suppliers are in a powerful position

Number and size of firms supplying the resources

A few large suppliers can exert more power over market prices that many smaller suppliers each with a small market share

Competition for the input from other industries

If there is great competition, the supplier will be in a stronger position

Cost of switching to alternative sources

A business may be “locked in” to using inputs from particular suppliers – e.g. if certain components or raw materials are designed into their production processes.  To change the supplier may mean changing a significant part of production

Bargaining power of customers

Powerful customers are able to exert pressure to drive down prices, or increase the required quality for the same price, and therefore reduce profits in an industry.

A great example in the UK currently is the dominant grocery supermarkets which are able exert great power over supply firms.  You can see a great video about this issue here.

Several factors determine the bargaining power of customers, including:

Factor

Note

Number of customers

The smaller the number of customers, the greater their power

Their size of their orders

The larger the volume, the greater the bargaining power of customers

Number of firms supplying the product

The smaller the number of alternative suppliers, the less opportunity customers have for shopping around

The threat of integrating backwards

If customers pose a threat of integrating backwards they will enjoy increased power

The cost of switching

Customers that are tied into using a supplier’s products (e.g. key components) are less likely to switch because there would be costs involved

Customers tend to enjoy strong bargaining power when:

  • There are only a few of them
  • The customer purchases a significant proportion of output of an industry
  • They possess a credible backward integration threat – that is they threaten to buy the producing firm or its rivals
  • They can choose from a wide range of supply firms
  • They find it easy and inexpensive to switch to alternative suppliers

Threat of substitute products

A substitute product can be regarded as something that meets the same need

Substitute products are produced in a different industry –but crucially satisfy the same customer need.  If there are many credible substitutes to a firm’s product, they will limit the price that can be charged and will reduce industry profits.

As an example, consider the many substitutes that consumers now have to buying a newspaper for their news:

Porters Five Forces

The extent of the threat depends upon

  • The extent to which the price and performance of the substitute can match the industry’s product
  • The willingness of customers to switch
  • Customer loyalty and switching costs

If there is a threat from a rival product the firm will have to improve the performance of their products by reducing costs and therefore prices and by differentiation.

Degree of competitive rivalry

If there is intense rivalry in an industry, it will encourage businesses to engage in

  • Price wars (competitive price reductions),
  • Investment in innovation & new products
  • Intensive promotion (sales promotion and higher spending on advertising)

All these activities are likely to increase costs and lower profits.

Several factors determine the degree of competitive rivalry; the main ones are:

Factor

Note

Number of competitors in the market

Competitive rivalry will be higher in an industry with many current and potential competitors

Market size and growth prospects

Competition is always most intense in stagnating markets

Product differentiation and brand loyalty

The greater the customer loyalty the less intense the competition
The lower the degree of product differentiation the greater the intensity of price competition

The power of buyers and the availability of substitutes

If buyers are strong and/or if close substitutes are available, there will be more intense competitive rivalry

Capacity utilisation

The existence of spare capacity will increase the intensity of competition

The cost structure of the industry

Where fixed costs are a high percentage of costs then profits will be very dependent on volume
As a result there will be intense competition over market shares

Exit barriers

If it is difficult or expensive to exit an industry, firms will remain thus adding to the intensity of competition 


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