1. Nature of message
The means of communication depends upon the nature of message; urgent, confidential, private and important messages should be distinguished from ordinary routine,open and less important messages and the means of communication are to be chosen accordingly.
The cost of sending a message is also to be considered while selecting a mode of communication. The result obtained should justify the expenditure.
If the record of the communication is important, it should be written otherwise oral communication is sufficient.
The mode of communication to be chosen depends on whether the message is to be sent to a nearby place or somewhere at a long distance.
5. Scale of organisation
Means of communication in large scale business is different from that in the small-scale in small business most communication is oral while in large business it is written.
6. Supporting technology
Both the sender and the receiver must have supporting technological communication tool to make communication through a particular medium. Suppose A sends an email to B. To get the email B should have a personal computer. Again to get a fax message one should posses a fax machine. Therefore while selecting a means of communication, one has to consider whether supporting technological tool is available at the other end.
Selection of the means of communication is to be made keeping in view the urgency of the communication. Time availabe is the main factor here. Higher cost maybe justified for sending the message in time.
If the message to be communicated is secret ir confidential, such means are required to be adopted that can maintain secrecy. A telephone call can be overhead, an email or fax may not be appropriate, on an office memo may be less confidential in such cases face to face talking may solve the problem.
The sender has to be careful about the safety of the message. He/she to decide weather the message would be sent by ordinary post or by registered post through carrier or messenger etc.
The relationship between the sender and the recipient may be a decisive factor in the choice of the means of communication. Message of private naturecmay require personal contact whereas formal relationship demands official and convectional mode of communication.