PDU stands for Professional Development Unit. You will typically earn one PDU for every one hour spent in a planned, structured learning experience or activity. Fractions of PDUs may be reported in 0.25 increments following one full hour. When attending conferences, one claim is made for the whole event, although you still need to keep records of the sessions actually attended.

PDU activities completed prior to obtaining certification are not accepted toward the renewal requirements.In addition to attending formal training courses, workshops, conferences and seminars; PDUs may also be earned by participating in voluntary work (eg on a PMI committee), by self directed study, professional activities and by presenting papers at conferences, etc.