On Stochastic Comparison Between Two Coherent Systems
  Stochastic orders are very useful tool to compare the lifetimes of two coherent systems. We show that, under certain conditions, a coherent system of used components performs better (worse) than a used coherent system with respect to different stochastic orders. Some results on stochastic comparison between a coherent system of inactive components and an inactive coherent system are also discussed. 
Nil Kamal Hazra and Asok K. Nanda
stat.AP