Hybrid Set Covering and Dynamic Modular Covering Location Problem: Application to an Emergency Humanitarian Logistics Problem
Abstract
:1. Introduction
- In this paper, we try to benefit from the coverage concept of SCLP to locate the facilities (with the aim of providing access to the facilities for all demand points) and MCLP to locate the service providing units (with the aim of maximizing the coverage of demand nodes by the modules respecting the limited number of modules) in an integrated model.
- The integrated model is capable of improving the service quality and exploiting the limited number of modules in a better way compared to the non-integrated approach.
- Studying covering location problems in different decision levels as strategic and tactical decisions is not conducted before in the literature.
- In spite of the modeling advantage of modularity in providing multi-level facilities, it has received very limited attention in covering location problems. In this study, modular capacitated MCLP is developed to assign the service providing units to the facilities.
- A threat case study as an application of the developed hybrid model is studied, and other variants for possible hybridization models are presented and compared through numerical examples.
2. Literature Review
3. SCLP and MCLP
4. Hybrid Covering Location Problem Formulation
- Location, number, and establishment time of facilities is strategic periods during the planning horizon.
- Type and number of each module assigned to the located facilities in tactical periods of each strategic period during the planning horizon.
- Percentage of the allocate demand of points to the assigned modules in tactical periods of each strategic period during the planning horizon.
- The problem is studied in a multi-period framework. The total planning horizon is classified into two types of periods as the strategic periods and tactical periods. Each strategic period is composed of several tactical periods with different kinds of decisions to be made.
- The facilities are supposed to be a piece of land or site, equipped with some initial infrastructures. The locations of these facilities are going to be decided only in strategic periods using the coverage concept of SCLP to determine the minimum number of facilities to be located with the aim of covering all demand points. Once a facility is opened in a strategic period, it cannot be closed and should continue its operation in future periods. In addition, the facilities are supposed to be capacitated, and the number of facilities can be expanded in response to the demand variation in the upcoming strategic periods.
- We suppose that there are different kinds of service providing units, namely the modules of facilities that are limited in terms of numbers and capacities. These modules can move to the facilities and should be assigned to the facilities in tactical periods. The optimal decisions of the module assignment to the facilities are supposed to obey the coverage concept provided with multi-period modular MCLP. The arrangement of modules in facilities can be varied in different tactical periods according to the points’ demand fluctuation in order to maximize the amount of total covered demands.
- Each module comes in different sizes. It can be chosen from different sizes to increase the service quality offered to demand points to overcome the service shortages or having idle units.
- The modules are portable, and they can be transferred among the facilities when there is more request in another facility. The transferability is an important specification of modularity design that yields to flexibility in the system and reduces costs. The portability of most modules helps to provide a good level of service to demand points without having to provide more modules.
- It is supposed that covering the demand points by the modules obeys the gradual coverage concept using a partial coverage function. In a gradual coverage function, the demand points inside the full coverage radius can be covered completely, but by increasing the coverage radius, the amount of coverage decreases and the points outside the partial coverage radius are supposed not to be covered.
Indices: | |
index of candidate facility locations; | |
index of demand points; | |
index of modules; | |
index of sizes; | |
index of strategic time periods; | |
index of tactical time periods; | |
Sets: | |
Set of candidate facility locations; | |
Set of demand points; | |
Set of modules; | |
Set of sizes; | |
Set of strategic time periods; | |
Set of tactical time periods in strategic period ; | |
Parameters: | |
Demand of point for service of module in strategic period and tactical period . | |
Number of available modules for module at each period. | |
Distance between facility and demand point . | |
Maximum service distance at strategic period . | |
Coverage level provided by facility to demand point | |
Partial coverage function, where . | |
Full coverage distance | |
Partial coverage distance | |
Binary parameter which is 1 if 0, otherwise. | |
Cost of locating a facility at facility location . | |
Capacity of each module per each size. | |
The th size for module | |
Capacity of facility . | |
Earned income from providing service of module to demand point in strategic period and tactical period | |
Decision variables: | |
1 if a facility is located at in strategic period , 0 otherwise. | |
1 if the th size of module is assigned to facility in strategic period and tactical period , 0 otherwise. | |
The percentage of demand point allocated to the module of facility in strategic period and tactical period . |
5. Comparison with Other Models
5.1. MCLP-MCLP
5.2. MCLP-SCLP
5.3. SCLP-SCLP
6. Experimental Tests
6.1. Case Study: Application of HCLP in Humanitarian Logistic Services
6.2. Numerical Results
6.3. Model Validation and Comparison Results
7. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Paper | Model S,M,H | Period S,M | Coverage Type B,G,C | Facility Type S,M | Data Modeling D,S,F,R | Capacity Constraint C,N,M | Decision Levels S,T,O |
---|---|---|---|---|---|---|---|
Toregas et al. [18] | S | S | B | S | D | N | S |
Rajagopalan et al. [9] | S | M | B | S | D | N | S |
Eiselt and Marianov [51] | S | S | G | S | D | N | S |
Berman et al. [52] | S | S | G | M | D | N | S |
Church and ReVelle [26] | M | S | B | S | D | N | S |
Bagherinejad et al. [53] | M | S | G,C | S | D | N | S |
Farahani et al. [54] | M | S | B | M | D | N | S |
Coco et al. [30] | M | S | B | S | R | N | S |
Yin and Mu [49] | M | S | B | M | D | C | S |
Berman et al. [42] | M | S | G,C | S | D | N | S |
Vatsa and Jayaswal [8] | M | M | B | S | S | C | S |
Alizadeh Nishi [50] | M | M | G | M | D | C | S |
Zhang et al. [45] | M,S | S | B | S | F | N | S |
Erdemir et al. [44] | M,S | S | B | M | D | N | S |
Proposed HCLP | H | M | G | M | D | C,M | S,T |
Problem Data | Operating Facilities in R1, R2, and R3 | Coverage % | MZ | MY | Obj | Time |
---|---|---|---|---|---|---|
: U (30, 50) : U (200k, 300k) : U (70k, 90k) : U (4M, 6M) | R1: Amagasaki, Izumi, Kakogawa, Kawanishi, Kishiwada, Nara, Sakai, Suita, Takatsuki, Wakayama, Yao. R2: Aomori, Iwaki, Morioka, Sendai. R3: Atsugi, Funabashi, Hino, Hitachinaka, Kawaguchi, Maebashi, Nagareyama, Noda, Odawara, Oyama, Saitama. | R1: 86.8% R2: 99.6% R3: 43.3% | 51.6 | 33.9 | 256M | 165 |
: U (30, 50) : U (20k, 30k) : U (70k, 90k) : U (4M, 6M) | R1: Amagasaki, Kakogawa, Kishiwada, Nara, Sakai, Suita, Takatsuki. R2: Aomori, Fukushima, Hachinohe, Iwaki, Koriyama, Morioka, Sendai. R3: Atsugi, Funabashi, Hino, Hitachinaka, Kawaguchi, Maebashi, Odawara, Oyama, Saitama. | R1: 8.6% R2: 37.5% R3: 4.3% | 50.6 | 39.9 | 22M | 71 |
: U (30, 50) : U (20k, 30k) : U (100k, 150k) : U (4M, 6M) | R1: Amagasaki, Izumi, Kakogawa, Kishiwada, Nara, Sakai, Suita, Takatsuki, Wakayama, Yao. R2: Aomori, Iwaki, Morioka, Sendai. R3: Atsugi, Funabashi, Hino, Hitachinaka, Kawaguchi, Maebashi, Nagareyama, Odawara, Oyama, Saitama. | R1: 86.7% R2: 99.6% R3: 43.3% | 51.3 | 33.9 | 250M | 330 |
: U (30, 50) : U (20k, 30k) : U (100k, 150k) : U (4M, 6M) | R1: Akashi, Amagasaki, Higashiosaka, Himeji, Hirakata, Ibaraki, Itami, Izumi, Kakogawa, Kawanishi, Kishiwada, Kobe, Kyoto, Nara, Neyagawa, Nishinomiya, Okayama, Osaka, Otsu, Sakai, Suita, Takarazuka, Takatsuki, Toyonaka, Uji, Wakayama, Yao. R2: Aomori, Fukushima, Hachinohe, Iwaki, Koriyama, Morioka, Sendai. R3: Ageo, Atsugi, Chiba, Chigasaki, Chofu, Fucho, Fujisawa, Funabashi, Hachioji, Hino, Hiratsuka, Hitachinaka, Ichihara, Ichikawa, Isesaki, Kamakura, Kashiwa, Kasukabe, Kawagoe, Kawaguchi, Kawasaki, Kodaira, Koshigaya, Kuki, Kumagaya, Machida, Maebashi, Matsudo, Mitaka, Mito, Nagareyama, Narashino, Niiza, Nishitokyo, Noda, Odawara, Ota, Oyama, Sagamihara, Saitama, Sakura, Sayama, Soka, Tachikawa, Takasaki,Tochigi, Tokyo,Tsukuba, Urayasu, Utsunomiya,Yachiyo. | R1: 39.5% R2: 47.6% R3: 33.9% | 93 | 35.1 | 140M | 1046 |
Demand Scenario | Obj | Coverage % | Time | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
50 | Low | 3 | 2 | 2 | 2 | U (4, 7) | U (150, 250) | U (500, 1000) | U (400, 800) | 3042.1 | 86% | 4 |
High | 3 | 2 | 2 | 2 | U (4, 7) | U (150, 250) | U (500, 1000) | U (400, 800) | 4359.5 | 65% | 3 | |
100 | Low | 3 | 3 | 2 | 3 | U (7, 10) | U (200, 250) | U (1000, 1500) | U (400, 800) | 17,251.2 | 84% | 213 |
High | 3 | 3 | 2 | 3 | U (7, 10) | U (200, 250) | U (1000, 1500) | U (400, 800) | 21,936.2 | 62% | 249 | |
150 | Low | 3 | 3 | 3 | 3 | U (10, 15) | U (200, 250) | U (1500, 2000) | U (400, 800) | 41,056.5 | 86% | 1013 |
High | 3 | 3 | 3 | 3 | U (10, 15) | U (200, 250) | U (1500, 2000) | U (400, 800) | 50,697.4 | 62% | 1073 | |
200 | Low | 3 | 3 | 4 | 3 | U (15, 20) | U (300, 350) | U (1000, 1500) | U (400, 800) | 25,134.5 | 30% | 1029 |
High | 3 | 3 | 4 | 3 | U (15, 20) | U (300, 350) | U (1000, 1500) | U (400, 800) | 26,740 | 22% | 1072 | |
250 | Low | 3 | 4 | 4 | 3 | U (20, 30) | U (300, 350) | U (1000, 1500) | U (400, 800) | 24,545.6 | 21.9% | 2169 |
High | 3 | 4 | 4 | 3 | U (20, 30) | U (300, 350) | U (1000, 1500) | U (400, 800) | 27,159.4 | 14.1% | 1479 | |
Low | 3 | 4 | 4 | 3 | U (20, 30) | U (300, 350) | U (1500, 2000) | U (400, 800) | 28,235 | 24% | 1203 | |
High | 3 | 4 | 4 | 3 | U (20, 30) | U (300, 350) | U (1500, 2000) | U (400, 800) | 31,482.5 | 16% | 1355 | |
Low | 3 | 4 | 4 | 3 | U (20, 30) | U (300, 350) | U (2000, 3000) | U (400, 800) | 28,235 | 24% | 1169 | |
High | 3 | 4 | 4 | 3 | U (20, 30) | U (300, 350) | U (2000, 3000) | U (400, 800) | 31,482.5 | 16% | 1399 | |
Low | 3 | 4 | 4 | 3 | U (20, 30) | U (350, 450) | U (1000, 1500) | U (400, 800) | 25,744.6 | 22.6% | 1343 | |
High | 3 | 4 | 4 | 3 | U (20, 30) | U (350, 450) | U (1000, 1500) | U (400, 800) | 28,396 | 14.6% | 1111 |
Demand Scenario | Obj | Coverage % | Time | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
50 | Low | 4 | 2 | 2 | 2 | U (4, 7) | U (150, 250) | U (400, 800) | U (400, 800) | 715.1 | 82% | 6 |
High | 4 | 2 | 2 | 2 | U (4, 7) | U (150, 250) | U (400, 800) | U (400, 800) | 2660.9 | 76% | 5 | |
100 | Low | 4 | 3 | 2 | 3 | U (7, 10) | U (200, 250) | U (1000, 1500) | U (400, 800) | 13,751.9 | 68% | 82 |
High | 4 | 3 | 2 | 3 | U (7, 10) | U (200, 250) | U (1000, 1500) | U (400, 800) | 18,627.9 | 62% | 126 | |
150 | Low | 4 | 3 | 3 | 3 | U (10, 15) | U (200, 250) | U (1500, 2000) | U (400, 800) | 49,496.5 | 83% | 499 |
High | 4 | 3 | 3 | 3 | U (10, 15) | U (200, 250) | U (1500, 2000) | U (400, 800) | 60,916.8 | 76% | 672 | |
200 | Low | 4 | 3 | 4 | 3 | U (15, 20) | U (200, 250) | U (1500, 2000) | U (400, 800) | 66,291.6 | 55% | 1083 |
High | 4 | 3 | 4 | 3 | U (15, 20) | U (200, 250) | U (1500, 2000) | U (400, 800) | 77,956.4 | 46% | 1076 | |
250 | Low | 4 | 4 | 4 | 3 | U (20, 30) | U (300, 450) | U (1500, 2000) | U (400, 800) | 63,323.5 | 52% | 1115 |
High | 4 | 4 | 4 | 3 | U (20, 30) | U (300, 450) | U (1500, 2000) | U (400, 800) | 76,925 | 43% | 1757 |
50 High | 100 High | 150 High | 200 High | |||||
---|---|---|---|---|---|---|---|---|
Hybrid | Con. | Hybrid | Con. | Hybrid | Con. | Hybrid | Con. | |
Obj | 4359 | 1276 | 21,936 | 10,956 | 50,697 | 10,126 | 26,740 | 9689 |
Facility cost | 5258 | 2470 | 5025 | 2559 | 11,230 | 2470 | 11,712 | 2409 |
Coverage % | 65.7% | 25.6% | 61.9% | 31% | 62% | 12.8% | 22% | 0.7% |
Total modules | 58/66 | 28/66 | 120/126 | 72/126 | 304/306 | 108/306 | 216/621 | 144/621 |
Demand Scenario | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
% | Z | Y | T | % | Z | Y | T | % | Z | Y | T | % | Z | Y | T | |||
50 | Low | 3 | 86 | 3.3 | 4.3 | 6 | 79 | 3 | 3.8 | 2 | 82 | 3 | 5.5 | 4 | 0 | 3 | 4.6 | 0.8 |
4 | - | - | - | - | 89 | 3.3 | 4.2 | 7 | 91 | 4 | 6 | 11 | ||||||
High | 3 | 65 | 3.6 | 4.3 | 2 | 53 | 3 | 3.8 | 2 | 59 | 3 | 5.6 | 2 | 0 | 3 | 4.2 | 0.7 | |
4 | - | - | - | - | 61 | 3.3 | 4.3 | 4 | 74 | 4 | 7 | 11 | ||||||
100 | Low | 3 | 84 | 3.6 | 6.5 | 213 | 75 | 3 | 5.3 | 219 | Inf | 41 | 100 | 197 | 1006 | |||
4 | - | - | - | - | 82 | 4 | 6 | 904 | Inf | |||||||||
High | 3 | 62 | 3.6 | 6.6 | 255 | 50 | 3 | 5.3 | 268 | Inf | 42 | 100 | 197 | 1006 | ||||
4 | - | - | - | - | 59 | 4 | 6.3 | 180 | Inf | - | - | - | - | |||||
150 | Low | 8 | 86 | 8 | 10.7 | 10,013 | RE | NS | 39 | 150 | 301 | 1015 | ||||||
High | 7 | 62 | 7.6 | 11.2 | 10,473 | RE | NS | 40 | 150 | 301 | 1019 | |||||||
200 | Low | 7 | 30 | 7 | 6 | 1064 | RE | NS | 44 | 200 | 399 | 1051 | ||||||
High | 7 | 22 | 7 | 6 | 1050 | RE | NS | 44 | 200 | 399 | 1052 | |||||||
250 | Low | 22 | 22 | 22 | 5.3 | 1583 | RE | NS | 40 | 250 | 499 | 1094 | ||||||
High | 22 | 14 | 22 | 5.3 | 1505 | RE | NS | 40 | 250 | 499 | 1103 |
Demand Scenario | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
% | Z | Y | T | % | Z | Y | T | % | Z | Y | T | % | Z | Y | T | |||
50 | Low | 4 | 82 | 4.5 | 5.2 | 6 | 82 | 3.5 | 4.7 | 10 | NS | 0 | 5 | 7.5 | 1 | |||
5 | - | - | - | - | 89 | 4.5 | 5 | 8 | 76 | 5 | 8.1 | 3 | - | - | - | - | ||
High | 4 | 76 | 4.5 | 5.5 | 3 | 76 | 3.5 | 5.4 | 10 | NS | 0 | 5 | 7.25 | 2 | ||||
5 | - | - | - | - | 82 | 4.5 | 5 | 11 | 70 | 5 | 8.5 | 3 | - | - | - | - | ||
100 | Low | 5 | 68 | 5.5 | 6.3 | 84 | 63 | 3.7 | 5.2 | 98 | 25 | 5 | 11.4 | 397 | 21 | 6 | 12.9 | 292 |
6 | - | - | - | - | 68 | 4.5 | 6.3 | 100 | 27 | 6 | 11 | 584 | - | - | - | - | ||
High | 5 | 62 | 5.7 | 6.5 | 53 | 61 | 4.2 | 6.6 | 45 | NS | 30 | 7 | 15.8 | 485 | ||||
6 | - | - | - | - | 60 | 4.2 | 6.1 | 32 | NS | - | - | - | - | |||||
150 | Low | 7 | 83 | 7.5 | 10 | 499 | 76 | 5.7 | 8.5 | 1020 | NS | 28 | 21.7 | 26.4 | 1023 | |||
8 | - | - | - | - | 72 | 4.7 | 8.1 | 1015 | NS | - | - | - | - | |||||
High | 7 | 76 | 8 | 10.1 | 672 | 62 | 4.7 | 8.5 | 1025 | NS | 28 | 150 | 301 | 1029 | ||||
8 | - | - | - | - | 48 | 3.7 | 6.3 | 1022 | 22 | 8 | 24 | 1020 | - | - | - | - | ||
200 | Low | 14 | 55 | 14 | 11.6 | 1083 | RE | NS | 30 | 200 | 399 | 1062 | ||||||
High | 14 | 46 | 14 | 11.7 | 1076 | RE | NS | 31 | 200 | 399 | 1094 | |||||||
250 | Low | 21 | 52 | 21.7 | 15.1 | 1115 | RE | NS | 27 | 250 | 500 | 1131 | ||||||
High | 21 | 43 | 21.7 | 15.1 | 1757 | RE | NS | RE |
Problem | Number of Constraints | Example |
---|---|---|
HCLP | ||
MCLP-MCLP | ||
MCLP-SCLP | ||
SCLP-SCLP |
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Share and Cite
Alizadeh, R.; Nishi, T. Hybrid Set Covering and Dynamic Modular Covering Location Problem: Application to an Emergency Humanitarian Logistics Problem. Appl. Sci. 2020, 10, 7110. https://doi.org/10.3390/app10207110
Alizadeh R, Nishi T. Hybrid Set Covering and Dynamic Modular Covering Location Problem: Application to an Emergency Humanitarian Logistics Problem. Applied Sciences. 2020; 10(20):7110. https://doi.org/10.3390/app10207110
Chicago/Turabian StyleAlizadeh, Roghayyeh, and Tatsushi Nishi. 2020. "Hybrid Set Covering and Dynamic Modular Covering Location Problem: Application to an Emergency Humanitarian Logistics Problem" Applied Sciences 10, no. 20: 7110. https://doi.org/10.3390/app10207110