The internal analysis of Celanese, Dow Chemicals, Eastman Chemicals, and APD reveals their strengths and weaknesses. Celanese has a varied range of brands, which can be leveraged to enhance profitability. Conducting the internal analysis allows the management to know the competitiveness of the company, enabling it to grip available market opportunities. The analysis provides information about the companies' strength and weaknesses, which can be used in expanding the size of the company.