In the organizational setting, mentoring usually "requires unequal knowledge", but the process of mentorship can differ. Bullis describes the mentoring process in the forms of phase models. Initially, the "mentee proves himself or herself worthy of the mentor's time and energy". Then cultivation occurs which includes the actual "coaching...a strong interpersonal bond between mentor and mentee develops". Next, under the phase of separation, "the mentee experiences more autonomy". Ultimately, there is more of equality in the relationship, termed by Bullis as Redefinition.