The focus of the following quote seems to be on newspaper articles. However, every observation and conclusion that Peter Drucker stresses with regard to the processes of writing and editing, directly relate to the same processes when any genre is concerned.
“Every first-rate editor I have ever heard of reads, edits and rewrites every word that goes into his publication . . . Good editors are not ‘permissive’; they do not let their colleagues do ‘their thing’; they make sure that everybody does the ‘paper’s thing.’ A good, let alone a great editor is an obsessive autocrat with a whim of iron, who rewrites and rewrites, cuts and slashes, until every piece is exactly the way he thinks it should have been done.” ~ Peter Drucker (1909-2005)