Introduction:
The private sector is a crucial component of the economy that drives growth and development. It comprises businesses that are owned and operated by individuals or groups of individuals for profit-making purposes. The performance of businesses in the private sector is measured by several metrics.

Financial Metrics:
One of the primary ways to measure the performance of businesses in the private sector is through financial metrics. Financial metrics include revenue, profits, return on investment, and cash flow. These metrics provide insight into the financial health of the business and its ability to generate profits.

Market Share:
Market share is another critical metric used to measure the performance of businesses in the private sector. Market share measures the percentage of total sales within a particular market that a company holds. A higher market share indicates that a company is more successful in capturing a larger portion of the market.

Customer Satisfaction:
Customer satisfaction is essential for the long-term success of businesses in the private sector. It is measured by customer feedback, surveys, and reviews. High customer satisfaction indicates that a business is delivering quality products or services that meet customers' needs and expectations.

Employee Satisfaction:
Employee satisfaction is another important metric used to measure the performance of businesses in the private sector. It is measured through employee engagement surveys, turnover rates, and employee retention rates. High employee satisfaction indicates that a business is providing a positive work environment and treating its employees well.

Corporate Social Responsibility:
Corporate social responsibility (CSR) is becoming an increasingly important metric used to measure the performance of businesses in the private sector. CSR measures a company's commitment to sustainability, social issues, and ethical practices. A strong CSR program can enhance a company's reputation and improve its overall performance.

Conclusion:
The performance of businesses in the private sector is measured by various metrics, including financial metrics, market share, customer satisfaction, employee satisfaction, and corporate social responsibility. By measuring these metrics, businesses can assess their performance, identify areas for improvement, and make informed decisions to achieve their goals.

Profitability is the method to measure the performance of the business in the 'private sector'.