<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0186-1042</journal-id>
<journal-title><![CDATA[Contaduría y administración]]></journal-title>
<abbrev-journal-title><![CDATA[Contad. Adm]]></abbrev-journal-title>
<issn>0186-1042</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Contaduría y Administración]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0186-10422015000400864</article-id>
<article-id pub-id-type="doi">10.1016/j.cya.2015.07.003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cálculo del punto de reorden cuando el tiempo de entrega y la demanda están correlacionados]]></article-title>
<article-title xml:lang="en"><![CDATA[Calculation of reorder point when lead time and demand are correlated]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Izar Landeta]]></surname>
<given-names><![CDATA[Juan Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ynzunza Cortés]]></surname>
<given-names><![CDATA[Carmen Berenice]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zermeño Pérez]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Tecnológica de Querétaro División Industrial ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<volume>60</volume>
<numero>4</numero>
<fpage>864</fpage>
<lpage>873</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0186-10422015000400864&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0186-10422015000400864&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0186-10422015000400864&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Este trabajo presenta un estudio comparativo del cálculo del punto de reorden cuando la demanda diaria de artículos es independiente del tiempo de entrega o cuando ambas variables están correlacionadas. El estudio se hace para un artículo con demanda y tiempo de entrega normal. Para el caso ilustrativo no ha habido diferencia significativa del punto de reorden calculado con ambos métodos, lo cual se debe a que la correlación entre ambas variables ha sido baja. Si el coeficiente de correlación toma valores altos negativos o positivos, entonces las diferencias del punto de reorden calculado con los 2 métodos son significativas. Estas diferencias también dependen del nivel de servicio manejado. Si el coeficiente de correlación es positivo, la metodología tradicional subestima el punto de reorden, y lo sobreestima en caso de que la correlación entre la demanda y el tiempo de entrega sea negativa. Por esto se recomienda que antes de estimar el punto de reorden, se calcule el coeficiente de correlación entre ambas variables y se apliquen las fórmulas de Wang en caso de que el coeficiente resulte entre &#8722;0.5 y &#8722;1 o entre 0.5 y 1. Si el nivel de servicio se incrementa, el punto de reorden también lo hace, requiriéndose un inventario mayor.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[This paper presents a comparative study of calculating the reorder point when the daily demand for goods is independent of lead time or when both variables are correlated. The study is done for an article with normal demand and lead time. For the illustrative case there has not been significant difference of reorder point calculated with both methods, which is due to the low correlation between the 2 variables. If correlation coefficient takes negative or positive high values, then the differences in calculated reorder point with the two methods are significant. These differences also depend on the service level managed. If the correlation coefficient is positive, the traditional methodology underestimates the reorder point and it overestimates if the correlation between demand and delivery time is negative. Therefore it is recommended that before estimating the reorder point, to calculate the correlation coefficient between the 2 variables and apply the Wang equations if the coefficient falls between &#8722;0.5 and &#8722;1 or between 0.5 and 1. If the service level increases, the reorder point so does, requiring a larger inventory.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Tiempo de entrega]]></kwd>
<kwd lng="es"><![CDATA[Demanda]]></kwd>
<kwd lng="es"><![CDATA[Coeficiente de correlación]]></kwd>
<kwd lng="es"><![CDATA[Punto de reorden]]></kwd>
<kwd lng="es"><![CDATA[Distribución normal]]></kwd>
<kwd lng="en"><![CDATA[Lead time]]></kwd>
<kwd lng="en"><![CDATA[Demand]]></kwd>
<kwd lng="en"><![CDATA[Correlation coefficient]]></kwd>
<kwd lng="en"><![CDATA[Reorder point]]></kwd>
<kwd lng="en"><![CDATA[Normal distribution]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The best of inventory]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barry]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Multichannel Merchant]]></source>
<year>2007</year>
<volume>3</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-45</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Safety stock determination with serially correlated demand in a periodic-review inventory system]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Charnes]]></surname>
<given-names><![CDATA[J.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Marmorstein]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Zinn]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Journal of Operational Research Society]]></source>
<year>1995</year>
<volume>46</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>1006-13</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The new role of inventories in business: Real world changes and research consequences]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chikan]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[International Journal of Production Economics]]></source>
<year>2007</year>
<volume>108</volume>
<page-range>54-62</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The effect of lead time uncertainty on safety stocks]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chopra]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Reinhardt]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Dada]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Decision Sciences]]></source>
<year>2004</year>
<volume>35</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-24</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Determining safety stock in the presence of stochastic lead time and demand]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Eppen]]></surname>
<given-names><![CDATA[G.D.]]></given-names>
</name>
<name>
<surname><![CDATA[Martin]]></surname>
<given-names><![CDATA[R.K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Management Science]]></source>
<year>1988</year>
<volume>34</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>1380-90</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Safety stock determination with correlated demands and arbitrary lead times]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fotopoulos]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[M.C.]]></given-names>
</name>
</person-group>
<source><![CDATA[European Journal of Operational Research]]></source>
<year>1988</year>
<volume>35</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>172-81</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Multistage safety stock planning with item demands correlated across products and through time]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Inderfurth]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Production and Operations Management]]></source>
<year>1995</year>
<volume>4</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>127-44</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Izar-Landeta]]></surname>
<given-names><![CDATA[J.M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Investigación de Operaciones]]></source>
<year>2012</year>
<edition>2.ª ed</edition>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Editorial Trillas]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pardo-Merino]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ruiz-Díaz]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
</person-group>
<source><![CDATA[SPSS 11 Guía para el análisis de datos]]></source>
<year>2002</year>
<publisher-loc><![CDATA[Madrid ]]></publisher-loc>
<publisher-name><![CDATA[McGraw Hill/Interamericana de España]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Computation of reorder levels when the demands are correlated and the lead time random]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ray]]></surname>
<given-names><![CDATA[W.D.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Journal of Operational Research Society]]></source>
<year>1981</year>
<volume>32</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>27-34</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Inventory management: An overview Canadian publications, practical applications and suggestions for future research]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silver]]></surname>
<given-names><![CDATA[E.A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Information Systems and Operations Research]]></source>
<year>2008</year>
<volume>46</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>15-28</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The effect of lead time uncertainty in a simple stochastic inventory model]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Song]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Management Science]]></source>
<year>1994</year>
<volume>40</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>603-13</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Taha]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Investigación de Operaciones]]></source>
<year>2004</year>
<edition>7.a ed</edition>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Pearson Prentice Hall]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Robustness of the normal approximation of lead time demand in a distribution setting]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tyworth]]></surname>
<given-names><![CDATA[J.E.]]></given-names>
</name>
<name>
<surname><![CDATA[O¿Neill]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Naval Research Logistics]]></source>
<year>1997</year>
<volume>44</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>165-86</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[sizing inventory when lead time and demand are correlated]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Zinn]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Croxton]]></surname>
<given-names><![CDATA[K.L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Production and Operations Management]]></source>
<year>2010</year>
<volume>19</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>480-4</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
