Methodology Disaster?

After I printed my confirmation paper, I got so nervous to hand it in. Hence, I did not do it today. What made me crazy was methodology part. One of my supervisors, RF, commented, "What is a 'multiple-holistic' case study design?" He wondered if it was rather a 'single-enbedded' design.

Noooooooo, I disagree! I hope I am right!!

Let's look at an example of a multiple-holistic design. According to Yin (2003, p.46):

A common example [of a multiple-holistic design] is a study of school innovations(such as the use of new curricula, reagganged school schedules, or new educational technology), in which individual schools adopt some innovation. Each school is the subject of an individual case study, but the study as a whole covers several schools and in this way uses a multiple-case design.

In my case, each organisation is the subject of an individual case study, but the study as a whole covers several organisations which adopt a particular management concept called X.

What's wrong with this? Anyway, his question indicates that I need a strong justification!!

Reference:
Yin, R. (2003). Case study research: Design and methods (3rd ed.). Thousand Oaks, CA: Sage.