If you upgrade the quality process of your corporations, they will produce higher quality products. If the quality of the products is for example 10% higher, you may try to sell them at a higher price, for example 5% higher. This will still make them about 5% more attractive than standard quality products. This is a way to increase the revenue of your corporations and improve your competitive advantage. On your corporation page you can purchase quality upgrades. They carry a high price but most times it makes good business sense. Keep upgrading your corporations and their profitability will increase. Private corporations can be upgraded 125 times and if pricing is correctly set, will be very profitable.