Optimality of Sequential Quality Control via Stochastic Orders
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In recent years, stochastic orders in general and stochastic convexity in particular have been demonstrated as playing a central role in the optimal design and control of stochastic systems (refer to the wide-ranging applications presented in a recent monograph by Shaked and Shanthikumar ; also, refer to Shaked and Shanthikumar  and Shanthikumar and Yao , among many others). A somewhat less known but equally useful property, stochastic submodularity, and its many applications have been illustrated in Chang and Yao  and in Chang, Shanthikumar, and Yao .
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