What Are The 7 C's Of Business Communication?

The communication is the tool to transfer your idea from one person to another. In business communication there are some principle areas as follows;
• Completeness
• Correctness
• Conciseness
• Clarity
• Concreteness
• Consideration
• Courtesy
Your question is about conciseness. Its main purpose is to pass message in fewest possible words in order to save time without scarifying the other C qualities. It emphasize on words. In conciseness you have to eliminate the unnecessary words and make the clear idea about the message.

To follow the conciseness you have to shorten the wordy expressions, write only relevant statements, avoid repetition, and give few examples and words. Example,
Take wordy sentences opposite to concise one.

Wordy: we will let you know about the picnic.

Concise: we will inform you about picnic.

Concise writing is doesn't mean short only but it has to be precise, straight forward and relevant to the topic. There some basic steps to write concise documents or letters.

1. Focus on message-avoid useless information and lengthy explanations.
2. Be clear –avoid long phrases.
3. Use plain language-use simple and straight language tools.
4. Stay simple-do not use trees you will lose your path in the forest.
5. Illustrate, don't explain-in figure, pictures cases.
6. use active voice.

The essential elements of good business communication have not changed. Following are the seven "C's" of
a good business letter:
COMPLETE
1. Have you given all the facts?
2. Have you covered the essentials?
3. Have you answered all his/her questions?
4. Did you PLAN what you said?
COURTEOUS
1. Will it win good will?
2. Have you used positive, "pleasant-toned" words?
3. Have you used "I appreciate," "please", and "thank you" somewhere in your message?
4. Would you enjoy reading what you have said?
CONSIDERATE: The YOU-Attitude
1. Have you put the client first?
2. Have you floodlighted his/her interests?
3. Have you walked in his/her moccasins?
4. Have you talked his/her language?
CLEAR
1. Have you used familiar words, short sentences?
2. Have you presented only one idea in each sentence?
3. Have you avoided "business" and technical terms?
4. Have you used the reader's language?
CONCISE
1. Have you plunged right into the subject of the message?
2. Have you avoided rehashing the reader's letter?
3. Have you said enough, but just enough?
4. Have you avoided needless "filler" words and phrase?
CONCRETE
1. Have you given the crisp details the client needs?
2. Have you made the details razor and needle-sharp?
3. Have you flashed word pictures, made facts vivid?
CORRECT
1. Have you checked all facts for correctness?
2. Have you spelled the reader's name correctly?
3. Have you verified all numbers and amounts?
4. Is the appearance of the letter effective? Is it clean, well-spaced?
5. Have you checked your spelling, punctuation, grammar, etc.?

Will it win good will?
2. Have you used positive, "pleasant-toned" words?
3. Have you used "I appreciate," "please", and "thank you" somewhere in your message?
4. Would you enjoy reading what you have said?
CONSIDERATE: The YOU-Attitude
1. Have you put the client first?
2. Have you floodlighted his/her interests?
3. Have you walked in his/her moccasins?
4. Have you talked his/her language

A concise message saves time and expense for both receiver and sender. Conciseness is saying what you have to say in the fewest possible words without sacrificing C qualities. By eliminating the unnecessary word.s,we help make important ideas stand out

I don't know the 7 c's about the business letter but I know what a business letter is and if you are looking for one you can find it here.