Steps that help people act on a good idea

Perhaps a reader can tell me the originator of the metrics below. Regardless of their source, these observations and percentages ring true. Managers of law departments would do better if they followed the advice suggested.
• 10 percent of people who hear a good idea will do something about it
• 25 percent will do something with it if they think hard about it
• 40 percent will do something with it if they prepare a plan
• 50 percent will do something with it if they add times to the plan
• 60 percent will do something with it if another person is asked to be involved
• 90 percent will do something with it if there is a date set to follow up with the other person