# Stochastic Server Location Problem on SSLP SIPLib

Source: [Stochastic Server Location Problem on SSLP SIPLib](<https://www.sota2.com/research/sota/stochastic-server-location-problem-on-sslp-siplib>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2026-02-26T05:45:53.557Z

Evaluation of algorithms solving the Stochastic Server Location Problem (SSLP) using the SIPLib dataset, focusing on solution quality (Gap to Optimal) and computational efficiency (Solving Time).

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

| Scope | Recorded value |
| --- | --- |
| Task | Stochastic Server Location Problem |
| Dataset (including any stated split) | SSLP SIPLib |
| Metric | Gap to Optimal |
| Unit | PERCENT |
| Direction | Lower is better |
| Results loaded | 30 of 30 |
| Coverage | All results currently returned for this benchmark |

Evaluation settings may differ between results. The original papers and recorded configurations are needed to establish comparability. A shared metric name alone does not establish an identical protocol.

## Metrics

- [Gap to Optimal](<https://www.sota2.com/research/sota/stochastic-server-location-problem-on-sslp-siplib.md?metric=Gap%20to%20Optimal>): Lower is better; unit: PERCENT.

- [Solving Time (s)](<https://www.sota2.com/research/sota/stochastic-server-location-problem-on-sslp-siplib.md?metric=Solving%20Time%20(s)>): Lower is better; unit: TIME.

## Recorded results

| Method | Gap to Optimal | Result date | Report paper |
| --- | --- | --- | --- |
| NN-E | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-P | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| EF | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-E | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-P | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| EF | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-E | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-P | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| EF | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-E | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-P | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-E | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-P | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| EF | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| EF | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| EF | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-E | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| EF | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-E | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| EF | 0 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-E | 0.46 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-E | 0.53 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-P | 1.4 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-E | 1.57 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-P | 2.15 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-P | 16.51 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-P | 18.23 | Not recorded | 68fa59ac1e209131ce9b937f |
| NN-P | 19.59 | Not recorded | 68fa59ac1e209131ce9b937f |
| EF | 28.64 | Not recorded | 68fa59ac1e209131ce9b937f |
| EF | 51.24 | Not recorded | 68fa59ac1e209131ce9b937f |

### NN-E

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e19.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_50"}. This record does not assert independent reproduction.

### NN-P

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e1a.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_50"}. This record does not assert independent reproduction.

### EF

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e1b.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_50"}. This record does not assert independent reproduction.

### NN-E

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e1c.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_100"}. This record does not assert independent reproduction.

### NN-P

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e1d.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_100"}. This record does not assert independent reproduction.

### EF

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e1e.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_100"}. This record does not assert independent reproduction.

### NN-E

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e1f.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_500"}. This record does not assert independent reproduction.

### NN-P

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e20.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_500"}. This record does not assert independent reproduction.

### EF

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e21.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_500"}. This record does not assert independent reproduction.

### NN-E

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e22.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_1000"}. This record does not assert independent reproduction.

### NN-P

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e23.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_1000"}. This record does not assert independent reproduction.

### NN-E

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e25.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_2000"}. This record does not assert independent reproduction.

### NN-P

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e26.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_2000"}. This record does not assert independent reproduction.

### EF

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e2a.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

Recorded evaluation configuration: {"Instance":"SSLP\_15\_45\_5"}. This record does not assert independent reproduction.

### EF

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e2d.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

Recorded evaluation configuration: {"Instance":"SSLP\_15\_45\_10"}. This record does not assert independent reproduction.

### EF

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e30.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

Recorded evaluation configuration: {"Instance":"SSLP\_15\_45\_15"}. This record does not assert independent reproduction.

### NN-E

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e31.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_5\_25\_50"}. This record does not assert independent reproduction.

### EF

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e33.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

Recorded evaluation configuration: {"Instance":"SSLP\_5\_25\_50"}. This record does not assert independent reproduction.

### NN-E

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e34.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_5\_25\_100"}. This record does not assert independent reproduction.

### EF

Gap to Optimal: 0. Result ID: 698ba7d47a967eddb7705e36.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

Recorded evaluation configuration: {"Instance":"SSLP\_5\_25\_100"}. This record does not assert independent reproduction.

### NN-E

Gap to Optimal: 0.46. Result ID: 698ba7d47a967eddb7705e28.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_15\_45\_5"}. This record does not assert independent reproduction.

### NN-E

Gap to Optimal: 0.53. Result ID: 698ba7d47a967eddb7705e2e.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_15\_45\_15"}. This record does not assert independent reproduction.

### NN-P

Gap to Optimal: 1.4. Result ID: 698ba7d47a967eddb7705e35.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_5\_25\_100"}. This record does not assert independent reproduction.

### NN-E

Gap to Optimal: 1.57. Result ID: 698ba7d47a967eddb7705e2b.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_15\_45\_10"}. This record does not assert independent reproduction.

### NN-P

Gap to Optimal: 2.15. Result ID: 698ba7d47a967eddb7705e32.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_5\_25\_50"}. This record does not assert independent reproduction.

### NN-P

Gap to Optimal: 16.51. Result ID: 698ba7d47a967eddb7705e2f.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_15\_45\_15"}. This record does not assert independent reproduction.

### NN-P

Gap to Optimal: 18.23. Result ID: 698ba7d47a967eddb7705e2c.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_15\_45\_10"}. This record does not assert independent reproduction.

### NN-P

Gap to Optimal: 19.59. Result ID: 698ba7d47a967eddb7705e29.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

[Implementation](<https://github.com/khalil-research/Neur2SP>)

Recorded evaluation configuration: {"Instance":"SSLP\_15\_45\_5"}. This record does not assert independent reproduction.

### EF

Gap to Optimal: 28.64. Result ID: 698ba7d47a967eddb7705e24.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_1000"}. This record does not assert independent reproduction.

### EF

Gap to Optimal: 51.24. Result ID: 698ba7d47a967eddb7705e27.

[Reporting paper](<https://www.sota2.com/research/paper/68fa59ac1e209131ce9b937f.md>)

Recorded evaluation configuration: {"Instance":"SSLP\_10\_50\_2000"}. This record does not assert independent reproduction.

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