Chien [5] categorized the eleven steps of SLP into four parts that are data input, procedure’s process, output results
and evaluation process. He also modified SLP to use this procedure for different shapes and hexagons. By using this
modified SLP, departments can be divided into sub departments. Additionally, SLP is a powerful approach and at
the same time is easy to use [6]. Ermin et al. [7] developed the overall factory layout in spite of limitation in size, position
and unit relationship. Improving the plant layout using SLP method will decrease the material flow considerably [8].