• No results found

Application of the work

µ = the expected value of 

4. NUMERICAL STUDY & RESULTS

5.1 Application of the work

In this thesis, the necessary steps for constructing an analytical model to decide on the optimum tagging decision were discussed. We firstly considered four different cases of tagging levels which are item-level tagging, case-level tagging, pallet-level tagging and no tagging. After defining the profit functions and taking the expectations of profit functions, we derived the equations that give us the optimum order quantity and maximum expected profit values for each cases. To analyse the problem more deeply we defined a continuous tagging level decision variable. After representing the parameters, which we consider as the inputs of our model, as the function of the lately defined tagging level decision variable, we are able to decide

on the packing size of the units as well.We checked the outcomes of our model with

numerical studies and the results are as follows: tagging level decision is affected by the relative price of RFID tags, the existent rates of misplacement and shrinkage errors, the improved rates of misplacement and shrinkage errors through RFID deployment and the variance of demand. The optimum tagging level moves to lower

level of tagging while the concavity degree of θ(y) and β(y) get higher. On the other

hand if the concavity degree of L(y) increases, optimum tagging level moves to high level of tagging.

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APPENDICES

APPENDIX A.1

Figure A. 2 : Different RFID Reader Systems

Figure A. 3 : Basic Components of an RFID System

VITA

Evşen Korkmaz was born in Niğde, in 1983. After graduating from Sinop Anatolian

High School in 2000, she started her university education at the department of Industrial Engineering at Istanbul Technical University. She received her bachelor degree of science in 2005 and at the same year she was accepted to the master programme of Industrial Engineering at Istanbul Technical University, Institute of Science and Technology. Since 2005, she is working as a research assistant at the department of Industrial Engineering.

Publications:

 Korkmaz E. and Tan T., 2007: Deciding on the Level of RFID Tagging on Inventories. INFORMS Annual

Meeting 2007 (The Institute for Operations Research and the Management Sciences), 4-7 November, Seattle, USA.

 Korkmaz E. and Üstündağ A., 2007: Standards, Security & Privacy Issues about Radio Frequency Identification (RFID). Proceedings of 1st RFID Eurasia Conference, 5-6 September, İstanbul, pp. 332-342.  Korkmaz E. and Üstündağ A., 2006: Standards, Security & Privacy Issues about Radio Frequency Identification (RFID). Proceedings of 4th International Logistics Congress, 29-30 November-01 December, İzmir, pp. 353-361

 Tinç K., Korkmaz E. and Altay A., 2007. Courier Choice Comparison in Companies Perspective, 22nd

European Conference on Operational Research (EURO XXII), 8-11 July, Prague, pp. 69.

 Altay A., Korkmaz E. and Tinç K., 2007: Distribution Center Choice Using AHP and Simulation in Courier Sector, 22nd European Conference on Operational Research (EURO XXII), 8-11 July, Prague, pp. 253.  Altay A, Korkmaz E. and Topçu Y. İ., 2006: An Integrated Model for Supplier Selection in the Steel Industry,

Proceedings of 4th International Logistics Congress, 29-30 November-01 December, İzmir, pp. 623-631.  Korkmaz E. ve Üstündağ A., 2006: Radyo Frekanslı Tanıma Teknolojisinin (RFID) Endüstriyel Kontrol Sistemlerine Entegrasyonu, VI. Üretim Araştırmaları Sempozyumu Bildiriler Kitabı, 22-23 Eylül, İstanbul, pp. 501-509.

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