Most businesses use intermediaries like distributors and dealers to sell their products through distribution channels. This allows businesses to achieve greater sales efficiency by leveraging the specialists, contacts, experience, and scale of intermediaries. Successful channels require all members, like Toyota and its dealers, to fulfill dependent roles and cooperate to compete against other manufacturers' channels. Channel conflicts can occur between firms within the same level (horizontal) or between levels of the same channel (vertical). Properly specifying each member's role and managing conflicts helps ensure good channel performance.