Definition of "movable partitions"

I am interested in an answer to this as well.

I honestly haven't gone through that calculation with that level of granularity, but it seems to make sense that doors wouldn't count as movable partitions (just thinking about it from a design and specification standpoint). Certainly worth trying that way as an initial design submittal to see what happens. 

Because this parameter is associated with the Furniture Reflectance strategy (Option 2F), I have always believed this is referring to open office systems furniture partitions.  It would mean that there is a value to having a "medium" to "light" color  on the system partitions presumably to allow for better reflectance in cubicles as well as in the overall space, thus potentially lowering the need for higher wattages of ambient light and providing less visual contrast & less eye fatigue.  That said, if the cubicles have doors (as some do), I would think they would need to be documented.