Christian Hass
 |
Christian Hass |
Contact Information
| M.Sc. Christian Hass | |
| E-Mail: | This email address is being protected from spambots. You need JavaScript enabled to view it. |
| Phone: | +49 (0) 89 289 - 17508 |
| Fax: | +49 (0) 89 289 - 17535 |
| Office: | Room 01.10.053 Boltzmannstr 3 85748 Munich, Germany |
| Hours: | by arrangement |
Biography
Christian Hass studied Information Systems at the TU München (TUM) where he received his Bachelor of Science and later on his Master of Science. In his Master Thesis he analysed and benchmarked linear (LP) solvers for the combinatorial allocation problem.
Since September 2008 Christian is working as a research assistant at the Chair of Decision Sciences & Systems (DSS) of the TU München.
Fields of Interest
- Linear Optimization
- Combinatorial Auctions
- Software Engineering
Research Project
- Auction Design in Markets with Economies of Scale and Scope (HP Labs Palo Alto)
- Combinatorial auctions have been used in procurement markets with economies of scope. But Preference elicitation becomes prohibitive even for small instances of multi-unit combinatorial auctions, as suppliers cannot be expected to enumerate a sufficient number of bids that would allow an auctioneer to find the efficient allocation. Auction design for markets with economies of scale and scope are much less well understood. They require more compact and yet expressive bidding languages, and supplier selection typically is a hard computational problem.
We proposed an adequate bidding language to express the characteristics of a supplier’s production function in markets with economies of scale and scope. Now our research focuses on efficient feedback calculation and mechanism design to investigate equilibrium strategies for iterative procurement auctions.
- Combinatorial auctions have been used in procurement markets with economies of scope. But Preference elicitation becomes prohibitive even for small instances of multi-unit combinatorial auctions, as suppliers cannot be expected to enumerate a sufficient number of bids that would allow an auctioneer to find the efficient allocation. Auction design for markets with economies of scale and scope are much less well understood. They require more compact and yet expressive bidding languages, and supplier selection typically is a hard computational problem.
- Field Workforce Scheduling (Joint work with Ioannis Petrakis)
- Mobile phone operators need to plan and schedule field force personnel for maintenance and repair tasks on mobile phone base stations across the country on a daily basis. Tasks have different priorities, deadlines, required skills and arise dynamically throughout the day.
We implemented a framework and developed a number of heuristics for the assignment of spacial distributed tasks to field force engineers. We were able to compare and optimize the algorithms with data sets of a large European mobile phone company.
- Mobile phone operators need to plan and schedule field force personnel for maintenance and repair tasks on mobile phone base stations across the country on a daily basis. Tasks have different priorities, deadlines, required skills and arise dynamically throughout the day.
- THESEUS / TEXO
- THESEUS is a research program initiated by the German Federal Ministry of Economy and Technology (BMWi), with the goal of developing a new Internet-based infrastructure in order to better use and utilize the knowledge available on the Internet. To this end, application-oriented basic technologies and technical standards are to be developed and tested under the umbrella of THESEUS. The expected results are novel products, tools, services, and business models for the World Wide Web, as well as for the service and knowledge society of tomorrow. THESEUS is the German project with the highest public founding, including enterprises like SAP and Siemens, and a number of academic institutions.
The aim of the TEXO application scenario within THESEUS is to provide businesses with an infrastructure for new web-based applications and services, on the basis of service oriented architecture (SOA). This infrastructure will be independent of any individual company and provide a flexible, semantic-driven interface between service providers and their customers.
Christian's work in TEXO addressed the integration of combinatorial auctions.
- THESEUS is a research program initiated by the German Federal Ministry of Economy and Technology (BMWi), with the goal of developing a new Internet-based infrastructure in order to better use and utilize the knowledge available on the Internet. To this end, application-oriented basic technologies and technical standards are to be developed and tested under the umbrella of THESEUS. The expected results are novel products, tools, services, and business models for the World Wide Web, as well as for the service and knowledge society of tomorrow. THESEUS is the German project with the highest public founding, including enterprises like SAP and Siemens, and a number of academic institutions.
Selected Publications
I. Petrakis, C. Hass, and M. Bichler. On the impact of real-time information on field service scheduling. Decision Support Systems, 53:282-293, 2012. [ link | pdf ]
Supervision
| ongoing | Sensitivity Analysis for the Supplier Quantity Selection Problem |
| ongoing | Heuristics on solving the Supplier Quantity Selection Problem |
| finished | Implementation and analysis of Construction Heuristics for solving the Supplier Quantity Selection Problem |
| finished | Optimizing tired bids for approximating cost functions with a given number of tiers |
| ongoing | GUI Design und Frontend-Entwicklung mit Java / Adobe Flex |
| finished | Visuelle Bietunterstützung in Volume Discount Auktionen |
| finished | Datenbank-Analyse und Visualisierung zur Bewertung von Bankgeschäften |
| finished | Development of a webservice for managing combinatorial auctions and a reference implementation for bidding agents (DA) |
| finished | Development of a SOA-based multi-agent system for automatic execution of combinatorial auctions (SEP) |
| finished | Asset Management Simulations Software (MT) |
Teaching
| WS 11/12 | Übung zu Business Analytics - Supervision |
| SS11 | Übung zu Decision Support System, Elitestudiengang Finance and Information Management (FIM), Elitenetzwerk Bayern - Supervision |
| WS 10/11 | Übung zu Business Analytics - Supervision |
| SS 10 | Übung zu Decision Support System, Elitestudiengang Finance and Information Management (FIM), Elitenetzwerk Bayern - Supervision |
| WS 09/10 | Übung zu Business Analytics - Supervision |
| SS 09 | Übung zu Decision Support System, Elitestudiengang Finance and Information Management (FIM), Elitenetzwerk Bayern - Supervision |
| WS 08/09 | Übung zu Business Analytics - Supervision |