| First level decision
Number of facilities {facility nodes} | Second level decision Facility node: assigned node(s) | Third level decision Minimum capacity (number of units) | Service unit# | Average response time per request (≤) | Average travel time per request (min.) | | Assigned facility node | Route: request# (earliest arrival time) | Sum of response time (min.) to requests |
| 4
, , , | :
( = 1, 2, 3, 4) | 4 | Unit :
( = 1, 2, 3, 4) | Unit i: i 1 (0) (5)
(i = 1, 2, 3, 4) | Unit : 0 + 5 = 5
( = 1, 2, …, 4) | 2.5 | 0 |
| | 2 , | : , | 2 | Unit 1: | Unit 1:
11 (0)12 (5)21 (25)22 (30) | Unit 1:
0 + 5 + 25 + 30 = 60 |
15 | 3.75 | | : , | Unit 2: | Unit 2:
31 (0)32 (5)41 (25)42 (30) | Unit 2:
0 + 5 + 25 + 30 = 60 |
| | 1 | : (all nodes) | 4 | Unit :
( = 1, 2, 3, 4) | Unit 1: 11 (0) 12 (5)
Unit 2: 21 (15)22 (20)
Unit 3: 31 (15)32 (20)
Unit 4: 41 (15)42 (20) | Unit 1: 0 + 5
Unit :
15 + 20 = 35
( = 2, 3, 4) |
13.75 | 5.625 |
|
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