Seminar on November 24, 2017

Applications of OR in Borusan Group Companies
Onur Can Saka
Borusan R&D

Abstract
We discuss several OR-related applied projects that have been carried out within Borusan Group, concentrating on two recent studies from logistics and steel production industries in more detail:

Routing and Scheduling in Road Transport Operations
The aim of this study is to develop a methodology to optimize the daily planning of road transport operations of a third-party logistics provider. The problem is represented on a time-space network and time windows are imposed on both pick-ups and deliveries, while synchronization requirements arise at cross-docks. We propose a construction algorithm that generates routes considering predefined rules for distinct vehicle types. The resulting set of routes is then inserted into a comprehensive mixed-integer linear programming model to find the least-cost assignment of orders to routes and vehicles satisfying problem constraints. We test and validate our model using real-life data of the company. We propose a matheuristic algorithm for solving larger instances.

Scheduling with Soft Deadlines for the Finishing Lines of a Steel Coil Producer
We propose a large neighborhood search heuristic for single-machine scheduling problem in the finishing lines of a steel coil producer. Jobs to be scheduled may have priorities and deadlines. Deadlines are not strict and any violation is penalized in the objective function. The goal of the study is to increase the efficiency of production by reducing setup times and costs. We compare results of our heuristic against manual schedules currently used by the company and report significant improvements on specific key performance indicators.

Short Bio
Onur Can Saka currently works as Optimization and Data Analytics Unit Manager at Borusan R&D, where he has led over 20 applied projects in various areas of operations research for the last two years. He is also a PhD candidate in Industrial Engineering and Operations Management at Koç University. Onur received his B.S. degree in Industrial Engineering from Middle East Technical University in 2010. He completed a joint Master’s program in 2013, earning two M.S. degrees; one in Operations Management and Logistics from Eindhoven University of Technology, and one in Industrial Engineering from Middle East Technical University. He began his professional career in 2012 as a Business Analyst at Arçelik. From 2014 to 2016, he worked for PlusOneMinusOne Software & Consulting, where he was involved in the development of routing and workforce optimization products as a Senior Operations Research Analyst. He joined Borusan R&D in early 2016. Onur’s areas of research interest include freight transportation and logistics optimization, green vehicle routing problems, production scheduling and simulation.

Venue
Friday, November 24, 2017 at 4.00 pm in IE03