Communication can best be summarized as the transmission of a message from a sender to a receiver in an understandable manner. The importance of effective communication is immeasurable in the world of business and in personal life. From a business perspective, effective communication is an absolute must, because it commonly accounts for the difference between success and failure or profit and loss. It has become clear that effective business communication is critical to the successful operation of modern enterprise. Every business person needs to understand the fundamentals of effective communication.

Currently, companies in the United States and abroad are working toward the realization of total quality management. Effective communication is the most critical component of total quality management. The manner in which individuals perceive and talk to each other at work about different issues is a major determinant of the business success. It has been proven that poor communication reduces quality, weakens productivity, and eventually leads to anger and a lack of trust among individuals within the organization.

The communication process is made up of four key components. Those components include encoding, medium of transmission, decoding, and feedback. There are also two other factors in the process, and those two factors are present in the form of the sender and the receiver. The communication process begins with the sender and ends with the receiver.

The sender is an individual, group, or organization who initiates the communication. This source is initially responsible for the success of the message. The sender's experiences, attitudes, knowledge, skill, perceptions, and culture influence the message. "The written words, spoken words, and nonverbal language selected are paramount in ensuring the receiver interprets the message as intended by the sender" (Burnett & Dollar, 1989). All communication begins with the sender.

The first step the sender is faced with involves the encoding process. In order to convey meaning, the sender must begin encoding, which means translating information into a message in the form of symbols that represent ideas or concepts. This process translates the ideas or concepts into the coded message that will be communicated. The symbols can take on numerous forms such as, languages, words, or gestures. These symbols are used to encode ideas into messages that others can understand.

When encoding a message, the sender has to begin by deciding what he/she wants to transmit. This decision by the sender is based on what he/she believes about the receivers' knowledge and assumptions, along with what additional information he/she wants the receiver to have. It is important for the sender to improve encoding their message, is to mentally visualize the communication from the receivers' point of view.

To begin transmitting the message, the sender uses some kind of channel (also called a medium). The channel is the means used to convey the message. Most channels are either oral or written, but currently visual channels are becoming more common as technology expands. Common channels include the telephone and a variety of written forms such as memos, letters, and reports. The effectiveness of the various channels fluctuates depending on the characteristics of the communication. For example, when immediate feedback is necessary, oral communication channels are more effective because any uncertainties can be cleared up on the spot. In a situation where the message must be delivered to more than a small group of people, written channels are often more effective. Although in many cases, both oral and written channels should be used by one supplements the other.

If a sender relays a message through an inappropriate channel, its message may not reach the right receivers. That is why senders need to keep in mind that selecting the appropriate channel will greatly assist in the effectiveness of the receiver's understanding. The sender's decision to utilize either an oral or a written channel for communicating a message is influenced by several factors. The sender should ask him or herself different questions, so that they can select the appropriate channel. Is the message urgent? Is immediate feedback needed? Is documentation or a permanent record required? Is the content complicated, controversial, or private? Is the message going to someone inside or outside the organization? What oral and written communication skills does the receiver possess? Once the sender has answered all of these questions, they will be able to choose an effective channel.

After the appropriate channel or channels are selected, the message enters the decoding stage of the communication process. Decoding is conducted by the receiver. Once the message is received and examined, the stimulus is sent to the brain for interpreting, in order to assign some type of meaning to it. It is this processing stage that constitutes decoding. The receiver begins to interpret the symbols sent by the sender, translating the message to their own set of experiences in order to make the symbols meaningful. Successful communication takes place when the receiver correctly interprets the sender's message.

The receiver is the individual or individuals to whom the message is directed. The extent to which this person comprehends the message will depend on a number of factors, which include the following: how much the individual or individuals know about the topic, their receptivity to the message, and the relationship and trust that exists between sender and receiver. All interpretations by the receiver are influenced by their experiences, attitudes, knowledge, skills, perceptions, and culture. It is similar to the sender's relationship with encoding.

Feedback is the final link in the chain of the communication process. After receiving a message, the receiver responds in some way and signals that response to the sender. The signal may take the form of a spoken comment, a long sigh, a written message, a smile or some other action. "Even a lack of response, is in a sense, a form of response" (Bovee & Thill, 1992). Without feedback, the sender cannot confirm that the receiver has interpreted the message correctly.

Feedback is a key component in the communication process because it allows the sender to evaluate the effectiveness of the message. Feedback ultimately provides an opportunity for the sender to take corrective action to clarify a misunderstood message. "Feedback plays an important role by indicating significant communication barriers" differences in background, different interpretations of words, and differing emotional reactions" (Bovee & Thill, 1992).

The communication process is the perfect guide toward achieving effective communication. When followed properly, the process can usually assure that the sender's message will be understood by the receiver. Although the communication process seems simple, it in essence is not. Certain barriers present themselves throughout the process. Those barriers are factors that have a negative impact on the communication process. Some common barriers include the use of an inappropriate medium (channel), incorrect grammar, inflammatory words, words that conflict with body language, and technical jargon. Noise is also another common barrier. Noise can occur during any stage of the process. Noise can take many forms, including a radio playing in the background, another person trying to enter your conversation, and any other distractions that prevent the receiver from paying attention.

Successful and effective communication within an organization stems from the implementation of the communication process. All members within an organization will improve their communication skills if they follow the communication process, and stay away from the different barriers. It has been proven that individuals that understand the communication process will blossom into more effective communicators, and effective communicators have a greater opportunity for becoming a success.

Communication is a process that allows organisms to exchange information by several methods. Communication requires that all parties understand a common language that is exchanged with each other. Exchange requires feedback. The word communication is also used in the context where little or no feedback is expected such as broadcasting, or where the feedback may be delayed as the sender or receiver use different methods, technologies, timing and means for feedback.

There are auditory means, such as speaking, singing and sometimes tone of voice, and nonverbal, physical means, such as body language, sign language, paralanguage, touch, eye contact, or the use of writing.

Communication happens at many levels (even for one single action), in many different ways, and for most beings, as well as certain machines. Several, if not all, fields of study dedicate a portion of attention to communication, so when speaking about communication it is very important to be sure about what aspects of communication on is speaking about. Definitions of communication range widely, some recognizing that animals can communicate with each other as well as human beings, and some are narrower, only including human beings within the parameters of human symbolic interaction.

Between parties, communication includes acts that confer knowledge and experiences, give advice and commands, and ask questions. These acts may take many forms, in one of the various manners of communication. The form depends on the abilities of the group communicating. Together, communication content and form make messages that are sent towards a destination. The target can be oneself, another person or being, another entity (such as a corporation or group of beings).

Depending on the focus (who, what, in which form, to whom, to which effect), there exist various classifications. Some of those systematical questions are elaborated in Communication Theory.

There is much discussion in the academic world of communication as to what actually constitutes communication. Currently, many definitions of communication are used in order to conceptualize the process by which people navigate and assign meaning.

Other commentators suggest that a ritual process of communication exists, one not artificially divorceable from a particular history and social context.

Communication stands so deeply rooted in human behaviours and the structures of society that scholars have difficulty thinking of it while excluding social or behavioral events. Because communication theory remains a relatively young field of inquiry and integrates itself with other disciplines such as philosophy, psychology, and sociology, one probably cannot yet expect a consensus conceptualization of communication across disciplines.

Currently, there is no paradigm from which communication scholars may work. One of the issues facing scholars is the possibility that establishing a communication meta-theory will negate their research and stifle the broad body of knowledge in which communication functions.

Communication as a named and unified discipline has a history of contestation that goes back to the Socratic dialogues, in many ways making it the first and most contestatory of all early sciences and philosophies. Aristotle first addressed the problem of communication and attempted to wok out a theory of it in The Rhetoric. He was primarily focused on the art of persuasion.

Humanistic and rhetorical viewpoints and theories dominated the discipline prior to the twentieth century, when more scientific methodologies and insights from psychology, sociology, linguistics and advertising began to influence communication thought and practice.

Seeking to define "communication" as a static word or unified discipline may not be as important as understanding communication as a family of resemblances with a plurality of definitions as Ludwig Wittgenstein had put forth.

1) Mechanistic: This view considers communication to be a perfect transaction of a message from the sender to the receiver. (As seen in the diagram above)

2) Psychological: This view considers communication as the act of sending a message to a receiver, and the feelings and thoughts of the receiver upon interpreting the message.

3) Social Constructionist (Symbolic Interactionist): This view considers communication to be the product of the interactants sharing and creating meaning.

4) Systemic: This view considers communication to be the new messages created via "through-put", or what happens as the message is being interpreted and re-interpreted as it travels through people.

Inspection of a particular theory on this level will provide a framework on the nature of communication as seen within the confines of that theory.

Theories can also be studied and organized according to the ontological, epistemological, and axiological framework imposed by the theorist.

Ontology essentially poses the question of what, exactly, it is the theorist is examining. One must consider the very nature of reality. The answer usually falls in one of three realms depending on whether the theorist sees the phenomena through the lens of a realist, nominalist, or social constructionist. Realist perspective views the world objectively, believing that there is a world outside of our own experience and cognitions. Nominalists see the world subjectively, claiming that everything outside of one's cognitions is simply names and labels. Social constuctionists straddle the fence between objective and subjective reality, claiming that reality is what we create together.

Epistemology is an examination of how the theorist studies the chosen phenomena. In studying epistemology, objective knowledge is said to be the result of a systematic look at the casual relationships of phenomena. This knowledge is usually attained through use of the scientific method. Scholars often think that empirical evidence collected in an objective manner is most likely to reflect truth in the findings. Theories of this lilk are usually created to predict a phenomenon. Subjective theory holds that understanding is based on situated knowledge, typically found using interpretative methodology such as ethnography and interviews. Subjective theories are typically developed to explain or understand phenomena in the social world.

Axiology is concerned with what values drive a theorist to develop a theory. Theorists must be mindful of potential biases so that they will not influence or skew their findings (Miller, 21 – 23).

A discipline gets defined in large part by its theoretical structure. Communication studies often borrow from other social sciences. This theoretical variation makes it difficult to come to terms with the field as a whole. That said, some common taxonomies exist that serve to divide up the range of communication research. Two common mappings involve contexts and assumptions.

Many authors and researchers divide communication by what they sometimes called "contexts" or "levels", but which more often represent institutional histories. The study of communication in the US, while occurring within departments of psychology, sociology, linguistics, and anthropology (among others), were generally developed from schools of rhetoric and from schools of journalism. While many of these have become "departments of communication", they often retain their historical roots, adhering largely to theories from speech communication in the former case, and from mass media in the latter. The great divide between speech communication and mass communication becomes complicated by a number of smaller sub-areas of communication research, including intercultural and international communication, small group communication, communication technology, policy and legal studies of communication, telecommunication, and work done under a variety of other labels. Some of these departments take a largely social-scientific perspective, others tend more heavily toward the humanities, and still others gear themselves more toward production and professional preparation.

These "levels" of communication provide some way of grouping communication theories, but inevitably, some theories and concepts leak from one area to another, or fail to find a home at all.

Another way of dividing up the communication field emphasizes the assumptions that undergird particular theories, models, and approaches. While this approach also tends to have as its basis institutional division, theories within each of the seven "traditions" of communication theory that Robert Craig suggests tend to reinforce one another, and retain the same ground epistemological and axiological assumptions. His traditions include:

Crain finds each of these clearly defined against the others, and remaining cohesive approaches to describing communicative behaviour. As a taxonomic aid, these labels help to organize theory by its assumptions, and help researchers to understand why some theories may seem incommensurable.

While communication theorists very commonly use these two approaches, it seems that they decentralize the place of language and machines as communicative technologies. The idea (as argued by Vygotsky) of communication theory. It finds some representation in the Toronto School of Communication Theory (alternatively sometimes called medium theory) as represented by the work of Innis, McLuhan, and others. It seems that the ways in which individuals and groups use the technologies of communication – and in some cases are used by them – remain central to what communication researchers do. The ideas that surround this, and in particular, the place of persuasion remain constant across both the "traditions" and "levels" of communication theory.