You start out lossing money when you try to get your product out there. Sales are just starting. You begin to become popular or get noticed by they public.
When your product or products begin to become more and more popular with the public . When people see this product everywhere they go. You sales from the previous season start to double and the triple and keep steadily growing
When your product or company has reached its maximum patiential
When your product it being over looked. It has become out dated or some quicker more efficient product has came into the market. and your sells start to fall.