Methods of Valuing Construction Variation in Lump Sum Contract from the Public Client’s PerspectiveZainab Mohmad Zainordin, Nurul Asra Abd Rahman, Shaza Rina Sahamir and Zul Khafiz Mohd KhalidMATEC Web Conf., 266 (2019) 03023DOI: https://doi.org/10.1051/matecconf/201926603023