U-shaped line balancing model with an uncertainty time on some tasks

U-shaped Assembly Line (UAL) applies the just-in-time principle which decreases the waste in the operations. This paper presents the UAL model which bases on an uncertain task time. It consists of eight certain tasks and three uncertain tasks. The objective function of the model is the minimum number of workstations. The model formulates on a zero-one integer linear programming. The distribution of the uncertain tasks assume discrete. The procedure of the UAL model is run by INTLINPROG toolbox on MATLAB R2014a. The solution of the uncertain tasks is the earliest finish duration. The earliest finish tasks which assign along the UAL line affect the minimum workstations.