Thinking about modules. The structure could be a series of modular tiles - or have a modular system in place for bath-room attachments. This method is more product based and I don't really want to go there as it is less about discovering solutions along the way but moreover applying a formula to solve all design problems. It's not necessarily the best way to design.
Cover Tiles are a modular system that makes visible the plumbing behind the bathroom's many different components. They have included taps and even the shower head into the tile design.
I consider this to be a beautiful representation of how the function, or workings of the bathroom, can inform the aesthetic qualities of it.
