It depends on the type of content we are producing. For example, a typical blog article would include the following list of actions (in this order): topic research, keyword research, content brief, article outline, content writing, creation of custom graphics, content editing and SEO optimization.
All of our clients have the option to be as involved in the process as they want to be. Some like to review finished articles while others like to give feedback on content briefs and article outlines as well.