alphanumeric Alphanumeric Journal 2148-2225 Bahadır Fatih YILDIRIM 10.17093/alphanumeric.659121 Operation Yöneylem A Different Approach to Nurse Scheduling Problem: Lagrangian Relaxation https://orcid.org/0000-0002-9569-8178 Öztürkoğlu Yücel YAŞAR ÜNİVERSİTESİ 12 31 2020 8 2 237 248 12 16 2019 09 24 2020 Copyright © 2013, Alphanumeric Journal 2013 Alphanumeric Journal

The problem of nurse scheduling is categorized in a Np-Hard complexity as it is inherently composed of many limitations and assumptions. As the number of nurses and the number of days increase, finding the solution of the problem becomes quite difficult. Therefore, this paper propose both an integer-programming model and a Lagrangian relaxation approach for solving nurse-scheduling problem. Numerical results show that while the developed mathematical model works on small-scale problems, Lagrangian relaxation method finds better results for large scale scheduling problem with much smaller duality gap in a reasonable computational time.

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