Explanation:

Channel richness refers to the amount of information that can be transmitted by a given communication channel. In business communication, selection of the right channel of communication depends on the richness offered by a channel. For example, notice boards are informal, phone calls are personal and face-to-face meetings are the most personal modes of communication in a business setting. Consider a manager who wants to inform the staff of a general policy (say, additions to the employee medical insurance); he can use emails to transmit the information. If however, the information is more complicated, say resolving a matter regarding delay in salary, the information can be exchanged with the Human Resources department over the phone. If the information is more complicated still, say the manager needs to fire someone or organize an event at short-notice, a face-to-face meeting is required to convey the message. Thus, the selection of a rich channel (as per the requirement) is critical to business communication.