Benjamin Leveque
Title:
Optimizing diversity

Abstract:
We consider a problem originating in the optimization of the
 diversity of industrial production.  Companies have to determine the
 semi-finished products that they stock in order to be able to
 assemble any possible finished product in at most a given number of
 operations.  The goal is to reduce the size of the stock for
 decreasing stockage costs. We do not know about any previous result
 concerning the underlying combinatorial problem.  We propose a
 simple construction providing a feasible solution, and conjecture
 its optimality; we then raise some other questions related to a
 possible proof of this conjecture. The questions are answered and
 the conjecture is proved in some cases that occur to be interesting.