List of Articles Cost Open Access Article Abstract Page Full-Text 1 - Discrete Time Analysis of Multi-Server Queueing System with Multiple Working Vacations and Reneging of Customers Vijaya Laxmi Pikkala Wondewosen Kassahun 20.1001.1.22286225.2019.9.1.1.4 Open Access Article Abstract Page Full-Text 2 - ‘BALANCING AND SEQUENCING’ VERSUS ‘ONLY BALANCING’ IN MIXED MODEL U-LINE ASSEMBLY SYSTEMS: AN ECONOMIC ANALYSIS Masoud Rabbani Zohreh Zahedian-Tejenaki Farnoush Otrody Amir Farshbaf-Geranmyeh Open Access Article Abstract Page Full-Text 3 - ANALYSIS OF DISCRETE-TIME MACHINE REPAIR PROBLEM WITH TWO REMOVABLE SERVERS UNDER TRIADIC POLICY Veena Goswami P. Vijaya Laxmi Open Access Article Abstract Page Full-Text 4 - COST AND ALLOCATIVE EFFICIENCY IN BUYER-SUPPLIER S. Mamizadeh-Chatghayeh Open Access Article Abstract Page Full-Text 5 - ON (A,C,B) POLICY QUEUE WITH CHANGE OVER TIMES UNDER BERNOULLI SCHEDULE VACATION INTERRUPTION Vijaya Laxmi Pikkala Seleshi Demie