“…Crucial, because it is essential to preserve this competitive resource as the intellectual and know-how capital, and to pass it on to the new generations of experts. This invisible, internal, not formalised and no longer conscious part of knowledge is often directly shared between apprentices and experienced fellows through socialization practices (Nonaka & Takeuchi, 1995) such as professional craft mentoring on the work field (Argyris & Schon, 1974;Castéra, 2008;Cushion, Armour, & Jones, 2003;Furlong & Maynard, 1995;Schön, 1983;Zanting, Verloop, & Vermunt, 2003), or within communities of practice (Wenger & Snyder, 2000;Wenger, 1998). However, the current societal context of the baby-boomer generation's mass-retiring makes less and less possible those types of relationships and training settings.…”