MATTER: International Journal of Science and Technology ISSN 2454-5880 1 Demir et al., 2016 Volume 2 Issue 1, pp. 01-19 Year of Publication: 2016 DOI- http://dx.doi.org/10.20319/Mijst.2016.s21.0119 This paper can be cited as: Demir, H. I., Cil, I., Uygun, O., Simsir, F., & Kokcam, A. H. (2016). Process Planning and Weighted Scheduling with WNOPPT Weighted Due-Date Assignment Using Hybrid Search for Weighted Customers. MATTER: International Journal of Science and Technology, 2(1), 01-19. This work is licensed under the Creative Commons Attribution-Non Commercial 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. PROCESS PLANNING AND WEIGHTED SCHEDULING WITH WNOPPT WEIGHTED DUE-DATE ASSIGNMENT USING HYBRID SEARCH FOR WEIGHTED CUSTOMERS Halil Ibrahim Demir Industrial Engineering Department, Sakarya University, Sakarya, Turkey hidemir@sakarya.edu.tr Ibrahim Cil Industrial Engineering Department, Sakarya University, Sakarya, Turkey icil@sakarya.edu.tr Ozer Uygun Industrial Engineering Department, Sakarya University, Sakarya, Turkey ouygun@sakarya.edu.tr Fuat Simsir Industrial Engineering Department, Karabuk University, Karabuk, Turkey fuatsimsir@karabuk.edu.tr Abdullah Hulusi Kokcam Industrial Engineering Department, Sakarya University, Sakarya, Turkey akokcam@sakarya.edu.tr