We haven't found any SAGE journal articles on this topic yet. In the meantime, you might find some helpful resources in the literature about completing a qualitative dissertation.  

You might see Completing Your Qualitative Dissertation, Third Edition, by Linda D. Bloomberg and Marie F. Volpe, SAGE Publications (2016).

There is a chapter called "Dissertation Advisors and Committees" in A Practical Guide to the Qualitative Dissertation by Sari Knopp Biklen and Ronnie Casella, published by the Teachers College Press (2007).