You can add a validation idem just the way you would add a e-learning course, an automatic email, a webinar or a face-to-face training.
Validation allows the program referent (or program manager) to confirm that a core concept has been thoroughly assimilated before going any further into the program. For instance, you can add a validation item after a face-to-face training to make sure that your trainees have validated the "management" skill.
Validation can be integrated as any other program element :
Once you've added the validation step, you can go into more details about the skill to be assimilated :