This report summarizes a study of the role of redundancy in communication. The investigation was carried out principally in terms of an n-dimension model of message space to determine an intuitively clear method of comparing the significance of redundancy in reducing error rates in a communication link with the contribu?tion realized through the use of long messages and delay.nThe study clearly indicates that the cost of communications including the cost of terminal coding and decoding equipment is not necessarily optimized when the channel capacity is used at highest efficiency, but a trade of channel capacity (in the use of redundancy) for improved reliability, i. e. , accuracy, may often be justified.
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