Challenges in service network expansion: An application in donated breastmilk banking in South Africa

A lexicographic maximin approach to the selective assessment routing problem

“…Equity has been considered in numerous application areas of humanitarian supply chains. According to Young and Isaac (1995) as cited in Cao et al (2016), the equity measures based on a different theory of justice can be categorized into three classes: "(i) Aristotle's proportional equity principle, where the resources are allocated in proportion to the beneficiaries' needs, (ii) classical utilitarianism, where the main aim is to maximize the total welfare of the whole system, and (iii) the Rawlsian maximin or difference principle, which refers to maximizing the welfare of the worst-off beneficiaries in the system" (Cao et al, 2016, 34). In this paper, we focus on the last class of measures within the context of humanitarian operations.…”

A lexicographic maximin approach to the selective assessment routing problem

“…There are various approaches for expressing equity in the literature. According to Young and Isaac (1995) as cited in Cao et al (2016), the equity measures based on a different theory of justice can be categorized into three classes: "(i) Aristotle's proportional equity principle, where the resources are allocated in proportion to the beneficiaries' needs, (ii) classical utilitarianism, where the main aim is to maximize the total welfare of the whole system, and (iii) the Rawlsian maximin or difference principle, which refers to maximizing the welfare of the worst-off beneficiaries in the system" (Cao et al 2016, 34). There are also other equity measures in the literature such as the Gini coefficient adopted from economics literature (e.g., Gutjahr and Fischer 2018;Eisenhandler and Tzur 2019;Mostajabdaveh et al 2019), lexicographical goal programming formulation (e.g., Ortuño et al 2011), the deprivation cost concept (e.g., Holguín-Veras et al 2013).…”

“…The max-min (or min-max) approach is one of the widely applied measures to address equity in humanitarian relief operations, such as maximizing the minimum satisfied demand in relief distribution (e.g., Tzeng et al 2007;Vitoriano et al 2011;Ransikarbum and Mason 2016;Cao et al 2016) or minimizing the maximum arrival time of critical supplies (e.g., Campbell et al 2008;Nolz et al 2010). A big flaw of this approach is that all solutions with the same max-min value, which might lead to significantly different solutions, are considered equivalent.…”

Placement Optimization in Refugee Resettlement

“…The refugee resettlement decision environment includes refugees as well as local communities, non-profit organizations, donors, and federal, state and local governments. Hence, similar to other humanitarian operations problems, placement optimization also diverges from the traditional stance of optimizing a single financial metric, and may consider alternative objectives such as those based on equity (see, e.g., Besiou and Van Wassenhove 2020, Cao et al 2016, Ç elik et al 2012). Refugee resettlement is perhaps most differentiated by its particular exposure and sensitivity to shifting political climates and attitudes, both domestic and abroad.…”