To the Editor

Christian Larsen

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To the Editor

机译：致编辑

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Ozkaya et al. [7] present a new policy, denoted a (Q, S, T) policy, for the stochastic joint replenishment problem. They do a thorough mathematical derivation of the cost performance of this policy, as well as an extensive numerical study. Based on this numerical study, their conclusion is that in many cases this new policy performs better than existing ones proposed for the stochastic joint replenishment problem, like the P(s,S) policy, proposed and analyzed by Viswanathan [8], and the Q(s,S) policy, proposed by Viswanathan [8], and analyzed by Nielsen and Larsen [6], Br0nmo [2] (Br0nmo's maiden name is Nielsen), Johansen and Thorstenson [3] and Larsen [5]. This letter alerts that there are numerical mistakes in Ozkaya et al. [7]. As Ozkaya et al. [7] do not state a very precise description of their algorithm and most often do not specify the computed optimal policy variables, it is somewhat hard for an outsider to replicate their numerical study, except for a few tables therein which this letter accordingly will focus on.

机译：Ozkaya等。 [7]提出了一种针对随机联合补给问题的新政策，称为（Q，S，T）政策。他们对该政策的成本绩效进行了彻底的数学推导，并进行了广泛的数值研究。根据此数值研究，他们的结论是，在许多情况下，该新政策的执行要比针对随机联合补给问题的现有建议（例如由Viswanathan [8]提出和分析的P（s，S）政策）表现更好。 Q（s，S）策略由Viswanathan [8]提出，并由Nielsen和Larsen [6]，Br0nmo [2]（Br0nmo的娘家姓是Nielsen），Johansen和Thorstenson [3]和Larsen [5]分析。这封信提醒您，Ozkaya等人存在数字错误。 [7]。如Ozkaya等。 [7]没有对它们的算法进行非常精确的描述，并且通常不指定计算出的最优策略变量，对于局外人来说，很难复制其数值研究，除了其中一些表相应地着眼于此字母。上。

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《Naval Research Logistics》 |2011年第4期|p.410|共1页
作者
Christian Larsen;
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Centre for Operations Research Applications in Logistics Department of Business Studies Aarhus School of Business Aarhus University Fuglesangs Alle 4 DK-8210 Aarhus V Denmark;

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