It is a decision-making technique, also known as 80/20 rule. It is used for quality control and defect resolution. It explains a few factors that can be responsible for big problems. It is named as 80/20 rule, because as per this rule, 80 % of effects in the system, arises from 20 % causes.
Business analysis is the set of tasks and techniques used to work as communication among stakeholders in order to understand the structure, policies, and operations of an organization, and to recommend solutions that enable the organization to achieve its goals.
Revenue can most easily be thought of as the top line of an income statement or profit and loss statement. Revenue is the total amount of income generated by the sale of goods or services related to the company's primary operations. If the company is a shoe retailer, the money it makes from selling shoes before accounting for any expenses is its revenue.