The Shannon-Weaver model of communication is a mathematical theory of communication that explains communication in terms of five basic components: a source, a transmitter, a channel, a receiver, and noise. It was initially published in the 1948 paper "A Mathematical Theory of Communication" by Claude Shannon and Warren Weaver. The model aims to provide a formal representation of the basic elements and relations involved in the process of communication. The model deals with various concepts like information source, transmitter, noise, channel, message, receiver, channel, information destination, encode, and decode. The model is specially designed to develop effective communication between the sender and receiver and to find factors that affect the communication process called "noise".

The Shannon-Weaver model has several advantages for communication planning. First, it provides a simple and clear way to identify and analyze the key components and factors of any communication process. It helps to clarify the roles and responsibilities of the sender and the receiver and to evaluate the effectiveness and efficiency of the transmission and reception of the message. However, the model has some limitations and drawbacks for communication planning. First, it assumes that communication is a linear and one-way process that does not involve any feedback or interaction between the sender and the receiver. It does not account for the dynamic and complex nature of communication, where meanings are co-constructed and negotiated through dialogue and feedback loops.

In summary, the Shannon-Weaver model of communication is a linear model that provides a framework for analyzing how messages are sent and received. It is one of the earliest and most influential models of communication and has been widely adopted in various fields, including information theory, organizational analysis, and psychology.