Codification of tacit knowledge is difficult and sometimes outright impossible. There will often be a resulting knowledge loss [20], [21]. Often, it is much more reasonable to simply externalize the sources of tacit knowledge rather than the knowledge itself [21] This means that often it is better for experts to externalize what they know rather than how they know it. The main role of KM then becomes making sure that experts can be found so that tacit knowledge can be passed on through practice, mentoring, and networking (socialization), and that the firm supports and encourages the networking that is necessary for these functions to occur.