Existence of invariant series consecutive-k-out-of-n:G systems

A consecutive-k-out-of-n:G line has an invariant optimal assignment if k/spl les/n/spl les/2k. This paper studies a system consisting of consecutive-k/sub i/-out-of-n/sub i/:G lines with k/sub i//spl les/n/sub i//spl les/2k/sub i/, completely characterizes the existence of an invariant optimal assignment.