When I was studying to become a Clinical Supervisor, my favourite module asked us to create a model of supervision that worked for us.
I enjoyed creating this model, and it is the model that underpins and informs my practice. I believe it encompasses many of the aspects required in supervision - the pastoral care, the challenge of one's practice, the administrative aspects, the relationships between client-therapist and therapist-supervisor, the stages of learning of the therapist and level of expertise of the supervisor, and so on.
I compiled these from existing theories, which I will describe briefly in this hour, and explain why I find these important for a thorough and complete supervision model.
I've created blog posts, videos, and images about this. Do have a look at the resources page for more on this content.