Preemption in multi-mode Resource-constrained project scheduling problem Zahra Zare* Department of Industrial Engineering Najafabad Branch, Islamic Azad University, Isfahan, Iran Postal Code: 71767-13763, Unit 3, No 142, 6 Alley, South Bahonar St., Shiraz, Iran Abdulreza Naddaf Department of Management Shiraz University, Shiraz, Iran Maysam Ashrafzadeh Department of Industrial Engineering Najaf...