Rerouting under chokepoint closure
Shipping network models find least-cost alternative routes when a chokepoint closes, and estimate added distance, time and capacity needed at alternative ports.
GCRI · Perdagangan dan Sumber Daya Strategis
Optimisasi untuk perdagangan dan pasokan
Optimisation and operations research decide how to route, stock and diversify supply under cost and risk. In this field they design rerouting, size strategic stocks and choose sourcing portfolios that hold up across disruption scenarios.
01Daftar
Optimisation for trade and supply on the record.
Catatan metodeMetode STEM
- MetodeOptimisasi dan riset operasi
- PengelolaIlmu Sistem dan Pemodelan
- Diterapkan diPerdagangan dan Sumber Daya Strategis
- Data3 inputs
- Pemeriksaan3 langkah validasi
- Halaman kanonisSTEM Commons
02Permohonan
What optimisation and operations research does here.
Optimisation and operations research develop mathematical methods for allocating resources and making decisions under constraints. They support planning and logistics in complex, interconnected sistem. In trade, resources and supply chains and industry and robotics, optimisation supports prepositioning of supplies, network investment and recovery sequencing. Robust formulations help choose options that perform acceptably across many scenarios. The canonical description is on STEM Commons.
Strategic stock sizing
Stock levels for essential inputs are set by comparing holding costs with expected kekurangan costs across disruption scenarios.
Sourcing portfolio design
Supplier mixes are optimised for cost and resilience, showing how much diversification reduces exposure for a given price premium.
03Simulator
Guncangan melalui ekonomi masukan-keluaran.
A loss of output in one sector propagates through the technical coefficients to its suppliers and customers, and recovers at the rate you set; the coefficients are teaching values, not national accounts. Teaching model with stated illustrative values, not a prediction.
Kendali
- Sektor yang terkena pertama (urutan dalam daftar)
- 0
- Ukuran guncangan
- 30% dari keluarannya
- Durasi guncangan
- 30 hari
- Laju pemulihan
- 0,08 per hari
- Hari yang disimulasikan
- 180 hari
Pembacaan
- Keluaran yang hilang selama simulasi
- 0.61% of a year’s output
- Total terhadap langsung (pengganda)
- 1.62 times
- Sektor lain yang paling terdampak
- Layanan
- Puncak ketidakberfungsiannya
- 3.9%
Angka, metode, dan sumber
| Sektor | Puncak ketidakberfungsian (%) | Bobot keluaran (%) |
|---|---|---|
| Pertanian | 30.85 | 14.6 |
| Energi | 2.83 | 16.5 |
| Manufaktur | 0.50 | 19.5 |
| Transportasi dan pelabuhan | 0.34 | 12.0 |
| Perdagangan | 0.23 | 19.8 |
| Layanan | 3.91 | 17.6 |
Metode
- Analisis masukan-keluaran Leontief (1936); Miller and Blair (2009), Input-Output Analysis, Cambridge University Press
- Model masukan-keluaran ketidakberfungsian Haimes and Jiang (2001), Journal of Infrastructure Systems 7
- Ketidakberfungsian dinamis dan pemulihan Lian dan Haimes (2006), Systems Engineering 9
- Kipas ketidakpastian (Monte Carlo parameter) Spiegelhalter, Pearson and Short (2011), Visualising uncertainty about the future, Science 333
- Sensitivitas satu per satu (tornado) Saltelli and others (2008), Global Sensitivity Analysis: The Primer, Wiley
Data
The model runs on the teaching values set by the controls. To calibrate it for a place, read it against these admitted layers and series, which this page’s map can draw:
- Pelabuhan laut Natural Earth
- Titik sempit maritim Nexus (selat dan terusan bernama pada koordinat terbitannya)
- Jalur kereta api Natural Earth
- Jalan utama Natural Earth
Di seluruh enam pilar, dipimpin oleh Nexus Consortium
- Eksperimen Laboratorium
- Tertanam di Perdagangan dan Sumber Daya Strategis di Foundry
- Diuji pada Perdagangan dan Sumber Daya Strategis di Universe
- Dikodifikasi dalam Industri, Perdagangan, dan Rantai Pasok di Standards
- Diterbitkan di Perdagangan dan Sumber Daya Strategis di Reports
- Diajarkan di Fakultas Keuangan dan Ekonomi di Academy
04Data
Apa yang digunakan metode ini.
Datasets and records used by optimisation and operations research on this platform, with the role each plays and the label its values carry. Sources are listed in register sumber.
| Data | Peran | Label |
|---|---|---|
| Shipping routes and port capacities | Network constraints | ESTIMASI |
| Disruption scenarios | Ketidakpastian | DIMODELKAN |
| Input costs and demand | Tujuan | TERAMATI |
05Metode dan bukti
How optimisation for trade and supply is modelled, measured and tested.
Model, asumsi, data, dan ketidakpastiannya, dalam bentuk yang akan diperiksa ilmuwan atau insinyur. Strukturnya mengikuti metode yang dipublikasikan. Nilai yang digambar bersifat ilustratif, bukan temuan.
Model sistem
The couplings between the systems in optimisation for trade and supply: signs of influence, a reinforcing and a balancing loop, and cross-links where stress jumps.
Prinsip panduan FAIR · GO FAIR dan FORCE11W3C PROV · World Wide Web ConsortiumPanduan penanganan ketidakpastian secara konsisten · IPCCCEOS Analysis Ready Data · Committee on Earth Observation Satellites
06Validasi
Cara hasil diperiksa.
Solutions are checked for feasibility, tested through simulation and compared with historical decisions. Analisis sensitivitas examines how results change with parameters.
| Pemeriksaan | Cara pelaksanaannya |
|---|---|
| Out-of-sample scenarios | Solutions are tested on scenarios not used to choose them |
| Operator review | Route and capacity constraints are checked with logistics operators |
| Trade-off reporting | Cost and resilience trade-offs are shown as a frontier |
Optimal solutions can be fragile when assumptions are wrong. Objectives may omit values that are hard to quantify.
07Keterkaitan
Topik yang bertumpu pada metode ini.
08Pengelolaan
Siapa yang memelihara metode ini.
Ilmu Sistem dan Pemodelan stewards optimisation and operations research for the Consortium and reviews how it is applied across platforms.
09Terhubung
Ke mana halaman ini mengarah di seluruh Konsorsium.
10Pertanyaan
Tanya jawab.
What are the limits of optimisation and operations research in this field?
Optimal solutions can be fragile when assumptions are wrong. Objectives may omit values that are hard to quantify.
Bagaimana hasil diperiksa?
Solutions are checked for feasibility, tested through simulation and compared with historical decisions. Sensitivity analysis examines how results change with parameters.
Apakah nilai di halaman ini nyata?
The data names, roles and checks are real descriptions of practice. The canvas shows a design of the method’s use, not a run; no result is reported here.
Di mana lagi metode ini diterapkan?
Observatory Halaman metode kanonis mencantumkan setiap platform yang menerapkannya.
LaporanBerkontribusi
Kontribusikan bukti dari halaman ini.
Laporan is the Consortium’s quarterly publication. What you know about this subject can become evidence, a case or a correction in the next edition, credited to you and published under CC BY 4.0 where it is your own work.
GCRIPerdagangan dan Sumber Daya StrategisSistem StrategisSkenario dan Uji Tekanan
- SurelGerbang GW-GCRIKirim dari halaman iniBukti, koreksi, kasus, metode, tinjauan, terjemahan, atau masukan profil. Kiriman tiba dengan label halaman ini, sehingga editor pemiliknya menerimanya.
- ZenodoDeposit terbukaDeposit dan ajukan ke komunitasTerbitkan catatan Anda sendiri di Zenodo dengan ORCID iD Anda, lalu ajukan ke komunitas Reports di sana. Kurator meninjaunya; DOI tetap milik Anda.
- LaporanGCRILihat semua cara berkontribusiJenis kontribusi, cara masing-masing ditinjau, kredit yang Anda terima, lisensinya, dan apa yang tidak pernah diterima.
Jangan pernah mengirim data pribadi, rincian infrastruktur sensitif, atau apa pun yang tidak berhak Anda bagikan. Kontribusi ditinjau sebelum digunakan. Mengirimkannya tidak memberikan hak kepenulisan atau editorial, dan sponsor tidak pernah membeli sebuah temuan.
Perdagangan dan Sumber Daya Strategis
Bawa metode, dataset, atau pertanyaan.
Informasi dan pertanyaan sudah terbuka hari ini. Sebuah pertanyaan menerima nomor referensi dan menyebutkan langkah berikutnya; lamaran, pembayaran, alokasi komputasi, dan pendaftaran hanya dibuka ketika tim, ketentuan, dan kapasitas tinjauannya tersedia.
Hukum
Dokumen hukum.
Peta, data, dan gambar di situs ini ditampilkan untuk konteks dan informasi umum. Semua itu bukan nasihat, prakiraan, atau peringatan; batasan informasinya dijelaskan dalam Penafian dan Pemberitahuan Data.