In modern technological industrial era, the typical manufacturing plant consists of a large number of diversified activities interconnected as a unit with required communication facilities. The manufacturing plant layout area consists of various activity cells such as design office, manufacturing shops, assembly and inspection departments, administration and security locations etc., The fundamental goal of facility layout problem is to minimize the material flow costs by positioning the cells within stipulated area. The orientation and spatial coordinates of each cell is specified by FLP design and the orientation of each cell may be in horizontal or vertical position. In this paper, the manufacturing plant layouthas been designed by using Computerized Relative Allocation of Facilities Technique (CRAFT). JAVA programme has been developed to design the optimum plant layout by considering STEP file as input for developing an optimum plant layout. © 2014 Published by Elsevier Ltd.