Substitute:-
The existence of products outside of the realm of the common product boundaries increases the propensity of customers to switch to alternatives. For example, tap water might be considered a substitute for Coke, whereas Pepsi is a competitor's similar product. Increased marketing for drinking tap water might "shrink the pie" for both Coke and Pepsi, whereas increased Pepsi advertising would likely "grow the pie" (increase consumption of all soft drinks), albeit while giving Pepsi a larger slice at Coke's expense. Another example is the substitute of traditional phone with a smart phone.
Buyer power:-
The bargaining power of customers is also described as the market of outputs: the ability of customers to put the firm under pressure, which also affects the customer's sensitivity to price changes. Firms can take measures to reduce buyer power, such as implementing a loyalty program. The buyer power is high if the buyer has many alternatives. The buyer power is low if they act independently e.g. If a large number of customers will act with each other and ask to make prices low the company will have no other choice because of large number of customers pressure.
Competitive Rivalry:-
A starting point to analysing the industry is to look at competitive rivalry. This term describes the intensity of competition between existing players (companies) in an industry If entry to an industry is easy then competitive rivalry will likely to be high.If it is easy for customers to move to substitute products for example from coke to water then again rivalry will be high.
Suppliers Power:-
The bargaining power of suppliers is also described as the market of inputs. Suppliers of raw materials, components, labor, and services (such as expertise) to the firm can be a source of power over the firm when there are few substitutes. If you are making biscuits and there is only one person who sells flour, you have no alternative but to buy it from them. Suppliers may refuse to work with the firm or charge excessively high prices for unique resources.