Configuration problems -- "I'd like the fizzbiggle thingy with quanger III options and a blue prelz in red. Will that fit through my door and how much will it cost?".

http://en.wikipedia.org/wiki/Xcon

http://cri-dist.univ-paris1.fr/diaz/publications/PL/rcis11.p...

http://cri-dist.univ-paris1.fr/diaz/publications/PL/rsse14.p...