Communication in business involves transferring information from one part of the business to another to create an outcome or change. There are formal communication channels that are established and agreed upon as well as informal "grapevine" channels. The communication process involves a sender, a channel or medium to transfer the message through, and a receiver. Common communication methods are verbal, written, electronic, and visual. The appropriate communication medium depends on factors like the need for a record, the number of people that need to reach, confidentiality, and cost. Barriers to successful communication can include the ability of the sender to understand the message, the content and method of communication, skills of the receiver, organizational factors, cultural attitudes, and technical capabilities.