Table 1 Comparison of key... | Emerald Publishing

Table 1

Comparison of key characteristics of previous vaccine network models

	Group 1 - No outreach locations			Group 2 - outreach locations
	1. Chen et al. (2014) A planning model for the WHO-EPI …	2. Lim (2016) Improving the design and operation …	3. Yang et al. (2021) Optimizing vaccine distribution networks …	4. Lim et al. (2016) Coverage models to determine outreach …		5. Mofrad (2016) Optimizing vaccine clinic operations …	6. Yang and Rajgopal (2019) Outreach strategies for vaccine distribution …
Objective
Maximize coverage	Maximize coverage				Maximize coverage
Minimize costs		Minimize costs	Minimize costs			Minimize costs	Minimize costs
Decisions
Open locations		Open hub	Open hub		Open outreach	Open outreach and clinic	Open outreach and clinic
Flow between nodes	Flow between nodes	Vehicle types and number	Vehicle types and number
Vehicle types	Vehicle types	Vehicle types	Vehicle types			Vehicle types and outreaches
Storage types	Storage types	Storage types	Storage types
Inventory levels	Inventory levels	Inventory levels	Inventory levels
Outreach routes						Number of outreach trips	Number of outreach trips
Capacity			Variable device capacity
Network structure
Central distribution	Central distribution	Central distribution	Central distribution
Hubs	Hubs	Hubs (variable)	Hubs (variable)
Clinics	Clinics	Clinics	Clinics		Clinics	Clinics (variable)	Clinics (variable)
Outreaches					Outreaches	Outreaches (variable)	Outreaches (variable)
Demand
Fixed exogenous	Fixed	Fixed
Stochastic			Stochastic			Stochastic	Stochastic
Causal (distance)					Causal (distance)
Product
Single vaccine		Single vaccine	Single vaccine		Single vaccine	Single vaccine	Single vaccine
Multiple vaccines	Multiple vaccines
Period
Single period					Single period	Single period	Single period
Multiple periods	Multiple periods	Multiple periods	Multiple periods
Constraints
Capacity on facilities	Capacity on facilities	Capacity on facilities	Variable capacity
Capacity on vehicles	Capacity on vehicles	Capacity on vehicles	Capacity on vehicles			Capacity on vehicles	Capacity on vehicles
Others			Single trip delivery		Dist. max outreach to fixed HC	Daily trips to one dest	Max travel time to multiple dest
						Patient and outreach max travel dist	Patient max travel dist

	Group 1 - No outreach locations			Group 2 - outreach locations
	1. Chen et al. (2014) A planning model for the WHO-EPI …	2. Lim (2016) Improving the design and operation …	3. Yang et al. (2021) Optimizing vaccine distribution networks …	4. Lim et al. (2016) Coverage models to determine outreach …		5. Mofrad (2016) Optimizing vaccine clinic operations …	6. Yang and Rajgopal (2019) Outreach strategies for vaccine distribution …
Objective
Maximize coverage	Maximize coverage				Maximize coverage
Minimize costs		Minimize costs	Minimize costs			Minimize costs	Minimize costs
Decisions
Open locations		Open hub	Open hub		Open outreach	Open outreach and clinic	Open outreach and clinic
Flow between nodes	Flow between nodes	Vehicle types and number	Vehicle types and number
Vehicle types	Vehicle types	Vehicle types	Vehicle types			Vehicle types and outreaches
Storage types	Storage types	Storage types	Storage types
Inventory levels	Inventory levels	Inventory levels	Inventory levels
Outreach routes						Number of outreach trips	Number of outreach trips
Capacity			Variable device capacity
Network structure
Central distribution	Central distribution	Central distribution	Central distribution
Hubs	Hubs	Hubs (variable)	Hubs (variable)
Clinics	Clinics	Clinics	Clinics		Clinics	Clinics (variable)	Clinics (variable)
Outreaches					Outreaches	Outreaches (variable)	Outreaches (variable)
Demand
Fixed exogenous	Fixed	Fixed
Stochastic			Stochastic			Stochastic	Stochastic
Causal (distance)					Causal (distance)
Product
Single vaccine		Single vaccine	Single vaccine		Single vaccine	Single vaccine	Single vaccine
Multiple vaccines	Multiple vaccines
Period
Single period					Single period	Single period	Single period
Multiple periods	Multiple periods	Multiple periods	Multiple periods
Constraints
Capacity on facilities	Capacity on facilities	Capacity on facilities	Variable capacity
Capacity on vehicles	Capacity on vehicles	Capacity on vehicles	Capacity on vehicles			Capacity on vehicles	Capacity on vehicles
Others			Single trip delivery		Dist. max outreach to fixed HC	Daily trips to one dest	Max travel time to multiple dest
						Patient and outreach max travel dist	Patient max travel dist

[ViewLarge]