It means that how the bargaining power of suppliers, bargaining power of buyers, threat of new competitors and threat of substitutes would affect the competition of different competitors in that particular similar sector and based on different industry sizes. All companies in the industry are different and impact differently (Johnson et al 2009). Some companies are large in size and capital, while some are small or medium and therefore their sector structures are not the same (Johnson et al 2009). For example, in the banking sector there are retail banks, corporate banks and Western syndicates. The effect could be discovered by conducting industrial analysis and then companies could have the strategies to continue to exist in the market (Johnson et al