Know How, Know What and Know When
Tacit knowledge is an essential part of the "profound knowledge" as referred by Deming
. It let us manage "know how" with "know what" and "know when".
If your know "what" you can say that you have diagnosed the topic well, but if you also know "when", means that you are able to foresee the results and reactions of the system, so you are a real champion in that topic.
By the way, real champions are capable to learn on their topic from any situation, even from people who have less or none knowledge on the subject. This is a huge benefit from solid tacit knowledge.