The effect of an effective audit committee during different stages of the life cycle on the company's performance

The main purpose of this research is to investigate the effect of an effective audit committee on the company's performance during different stages of the company's life cycle. To check the performance, 4 criteria of added value of the market, Q-Tobin, return on capital, and return on assets have been used, and to show the index of effective audit committee, coverage analysis and three indicators of number, independence, and experience members have been used (statistics and the probability level of the Comeau and Bartlett tests confirm that coverage analysis can be used). According to the life cycle of the company, the selected statistical sample was divided into 5 categories: introduction, growth, decline, stagnation, and maturity, and 88 companies were used in the period from 2018 to 2022 to test the hypotheses. The results of the research show that an effective audit committee has a positive effect on the company's performance, and this effect is significant when the market value added performance index is used. But, the impact of the effective audit committee on performance was determined to be different according to the different stages of the life cycle, which is always positive.