  We study the allocation strategies for redundant components in the
load-sharing series/parallel systems. We show that under the specified
assumptions, the allocation of a redundant component to the stochastically
weakest (strongest) component of a series (parallel) system is the best
strategy to achieve its maximal reliability. The results have been studied
under cumulative exposure model and for a general scenario as well. They have a
clear intuitive meaning, however, the corresponding additional assumptions are
not obvious, which can be seem from the proofs of our theorems
