The publishing house I work for has plans to publish a multivolume book (about 15 volumes with 700-800 pages each). We've been discussing about indexing strategy, but haven't decide anything yet. I would like to know which approach is the best. All suggestions are very welcome

- All materials will be prepared in MS Word's .doc format and delivered to me
- I'm using Kile for preparing books
I think that each book will have index at it's end (not in separate book for index only). Since I don't expect that anyone I'll be working with on this project use LaTeX, .doc is starting point so some kind of conversion will be necessary. I also expect that I'm not the one who will be preparing index but some student and in that case it will most likely be done in MS Word. Any advice?
Thanks