The minimum<i>p</i>-envy location problem: a new model for equitable distribution of emergency resources

Chanta, Sunarin; Mayorga, Marı́a E.; Kurz, Mary E.; McLay, Laura A.

doi:10.1080/19488300.2011.609522

Cited by 78 publications

(35 citation statements)

References 31 publications

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“…(), Chanta et al. () proposed the minimum p ‐envy location model, relaxing the strict and ordinal preference assumptions made originally in Espejo et al. (), and including backup servers.…”

Section: Review Of Related Literaturementioning

confidence: 99%

“…Espejo et al (2009) introduced the envy criteria, which measures the difference between pairs of customers (thus, is a measure of equity). Based on Espejo et al (2009), Chanta et al (2011 proposed the minimum p-envy location model, relaxing the strict and ordinal preference assumptions made originally in Espejo et al (2009), and including backup servers. Most of the equity considerations in location problems have been devoted to reducing disparities among customers, but they are not the only players in the system.…”

Section: Review Of Related Literaturementioning

confidence: 99%

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Identifying trade‐offs in equity and efficiency for simultaneously optimizing location and multipriority dispatch of ambulances

Enayati

Mayorga

Toro-Díaz

et al. 2018

Int Trans Operational Res

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The role of emergency medical service (EMS) systems is to provide acute care and possibly transportation to health care facilities to patients experiencing medical emergencies. Since EMS is a public service, it is natural for the community to expect equitable service from these systems; however, there is not a unique agreement on how to measure equity. Most EMS planning literature focuses solely on measures of efficiency, such as minimizing average response time. Solutions based on optimizing efficiency measures alone can be unacceptable when they are achieved at the expense of some players. Such trade‐offs can be more crucial when it comes to high‐priority emergencies. We provide a multicriteria optimization approach aimed at identifying good solutions for several equity and efficiency measures together, based on a joint modeling approach for location and dispatching policy decisions, while considering multiple levels of call priority. We apply our approach to a real‐world data set. We show that the joint approach provides better solutions than using the common assignment of the closest available ambulance, in particular for the equity criteria. We quantify the trade‐offs between different performance measures, and provide Pareto‐efficient solutions. The proposed joint optimization approach can be used to gain insight about the implicit balance between common efficiency measures and discussed equity criteria, hence providing better information to policy makers and EMS system administrators.

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Section: Review Of Related Literaturementioning

confidence: 99%

Section: Review Of Related Literaturementioning

confidence: 99%

Identifying trade‐offs in equity and efficiency for simultaneously optimizing location and multipriority dispatch of ambulances

Enayati

Mayorga

Toro-Díaz

et al. 2018

Int Trans Operational Res

Self Cite

View full text Add to dashboard Cite

show abstract

“…Some studies that consider equity as an objective areChanta et al (2011) (determining locations of ambulance dispatch facilities for equitable access by demand zones);Meng and Yang (2002) (optimizing road network expansion for equitable benefits received by people);Mazumdar et al (1991) (equitable assignment of performance in a multiuser telecommunications network);Wang et al (2007) (equitable water rights allocation between countries); andVossen et al (2003) (equitable allocation of national air space) Marsh and Schilling (1994). focus on the equity objective for facility location problems, defining equity as the case where -each group receives its fair-share of the effect of the facility siting decisions.‖…”

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confidence: 99%

Modeling for the equitable and effective distribution of donated food under capacity constraints

et al. 2015

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Mathematical models are presented and analyzed to facilitate a food bank's equitable and effective distribution of donated food among the population at risk for hunger. Typically exceeding the donated supply, demand is proportional to the poverty population within the food bank's service area. The food bank seeks to ensure a perfectly equitable distribution of food, i.e., each county in the service area should receive a food allocation that is exactly proportional to the county's demand such that no county is at a disadvantage compared to any other county. This objective often conflicts with the goal of maximizing effectiveness by minimizing the amount of undistributed food. Deterministic network-flow models are developed to minimize the amount of undistributed food while maintaining a user-specified upper bound on the absolute deviation of each county from a perfectly equitable distribution. An extension of this model identifies optimal policies for the allocation of additional receiving capacity to counties in the service area. A numerical study using data from a large North Carolina food bank illustrates the uses of the models.A probabilistic sensitivity analysis reveals the effect on the models' optimal solutions arising from uncertainty in the receiving capacities of the counties in the service area.

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“…Furthermore they are close to reality when systems have all advanced life support vehicles (ALS) and treat all real emergency calls equally (which is often the case). Furthermore, allowing for multiple vehicles at stations does not tend to increase coverage, and when it does, may result in inequitable (from the point of the customer) solutions, Chanta et al [30], and McLay et al [31]. We also assume that there is a zero-length patient queue.…”

Section: Ems System With Nested-compliance Policymentioning

confidence: 97%

A nested-compliance table policy for emergency medical service systems under relocation

Sudtachat

Mayorga

McLay

2016

Omega

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The minimump-envy location problem: a new model for equitable distribution of emergency resources

Cited by 78 publications

References 31 publications

Identifying trade‐offs in equity and efficiency for simultaneously optimizing location and multipriority dispatch of ambulances

Identifying trade‐offs in equity and efficiency for simultaneously optimizing location and multipriority dispatch of ambulances

Modeling for the equitable and effective distribution of donated food under capacity constraints

A nested-compliance table policy for emergency medical service systems under relocation

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