Bringing the Power of LocalSolver to R: a Real-Life Case-Study
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A presentation I conducted at EARL 2014 in London.
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Bringing the Power of LocalSolver to R: a Real-Life Case-Study
- 1. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl Optimization with R Bringing the Power of LocalSolver to R: a Real-Life Case-Study
- 2. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl Diversity challenges at WLOG Solutions • finance, logistics, production, telecoms, publicIndustries: • on-site, near shore, off shoreDelivery models: • consulting, solution implementation, trainingContract types: • data fusion, prediction, visualization, simulation, optimizationAnalytical problems:
- 3. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl
- 4. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl One size does not fit all Software ecosystems: R, SAS, Python, JavaScript, PHP, Java, C++, … Optimization: LocalSolver, Gurobi, IBM (ILOG), Sicstus, ECLiPSe, COIN-OR, GLPK
- 5. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl Optimization tool heaven for R • Seamless to wrap into R processing workflow • Separation of model and data specification • High level definition of optimization task • Swiss army knife (we would love to get a free lunch ) • Reliable support and continued development • Free and open-source
- 6. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl LOCALSOLVER PACKAGE
- 7. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl localsolver package architecture Solution presentation GNU R (e.g. shiny app) Solving LocalSolver engine Model building LSP language Data preparation GNU R
- 8. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl LocalSolver engine Innovative math modeling language New generation hybrid solver
- 9. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl Why localsolver package? Current optimization packages • Many tools for one task • Low level API • Low performance • Restricted modelling approach localsolver package • One tool for many tasks • High-level API • High performance • Wide range of applications • What we got: • Shorter projects • Simpler to debug • Lower delivery costs
- 10. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl Solving k-medoids: a comparison Rglpk • 45 LOC • 1 hour including „stupid” bugs • Need to populate constraint matrix from R’s data structures • No high-level math modelling language localsolver • 18 LOC • 15 minutes spent mostly inventing model • Staying with R’s data structures • Flexible high-level math modelling language http://rsnippets.blogspot.com/2014/07/comparing-localsolver-with-rglpk-on-k.html
- 11. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl LOGISTIC NETWORK PLANNING FOR POULTRY MEAT PRODUCER
- 12. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl Poultry meat logistic network planning problem Factories 3 locations Warehouses 18 locations 3 different sizes Customers 3000 locations Products 2 types (fresh, processed) thousands of SKUs Choose optimal locations and capacities of warehouses
- 13. Wit Jakuczun, PhD – CEO at WLOG Solutions wit.jakuczun@wlogsolutions.pl THANK YOU!
Editor's Notes
- Tego nie łapię – toolbox?
- Jakie story za tym slajdem? Ja bym jednak pokazał, że analityka bez optymalizacji nie jest pełna.
- Ostatnie to nie do końca bo LocalSolver jest proprietrary
- O Innovation24 nie warto wspomnieć?
- Jakaś fajniesza prezentacja?
- Te ni