Once you have your list of requirements (i.e., who needs to know what), you can assess their competence. If you discover a person is competent at a required task, indicate so on a checklist or matrix...and directly to that person.
If there is room for improvement, I suggest working with the individual (or the team, if applicable) on developing an action plan to gain the necessary skill set. Something like 30-, 60-, 90-, 120-day plan.
At the same time, you'll also need to determine how much additional training will cost. The company may not want to send everyone on a course that is off-site. One thing I've seen done is a group 'book study'. Everyone reads the same book and a person is selected, at random, each week to report on the chapter that was to have been read. The group then discusses if they agree, if they can do/implement, etc.