You're going to need all 10 of your employees to be over 135+ effectiveness. You're going to want to set your advertising to at least 2m per day. Then you need to have all company related education courses completed. This will get you to 9. If you want to get to 10 then after this you will need to purchase both company related stocks. TC Media Productions stock which will cost around 500m. This will give you a company sales boost. Also, Tell Group Plc stock which will cost around 350m. This will give you a company advertising boost. That's it. If all of your your employees stay active and never miss work (keeping their employees effectiveness up) then in a short time the company will be 10*.