An IDP is prepared by schools, colleges or local authorities working with the child, their parents or the young person, as well as professionals (such as health professionals).
Caiff CDU ei baratoi gan ysgolion, colegau neu awdurdodau lleol sy’n gweithio gyda’r plentyn, ei rieni neu’r person ifanc, yn ogystal â gweithwyr proffesiynol (fel gweithwyr iechyd proffesiynol).