ABCD

A= accurate
B= brief
C= clear
D= direct

 

Accurate means free from error or defect; consistent with a standard, rule, or model; precise; exact (see http://dictionary.reference.com/browse/accurate).

Brief means short in duration, extent, or length (see http://www.merriam-webster.com/dictionary/brief). Brief also means lasting or taking a short time; of short duration (see http://dictionary.reference.com/browse/brief)

Clear means to free from confusion, doubt, or ambiguity; make plain or intelligible (see http://www.thefreedictionary.com/clear).

Direct means straightforward in means or manner or behavior or language or action (see http://www.thefreedictionary.com/direct).

  

Hume, M (2012) states:

Assertive people have a natural "ABCD" way of getting their points across; they're Accurate, Brief, Clear, and Direct. You know where you stand with them.
Article Source: http://EzineArticles.com/6956998

http://ezinearticles.com/?Great-Leadership-Requires-Inspiration,-IX&id=6956998

Malmfors, B., Garnsworthy, P. & Grossman, M., “Science Communication: A brief guide”, wrote,

“Science communication means sharing knowledge and it is important that the audience grasp the message and understand what is said. The ABC of written or oral communication is that it should be accurate, brief and clear!”

http://agtr.ilri.cgiar.org/Documents/Compendia/Compendium_SciCom.pdf