Facility layout planning (FLP) is an important stage for optimal design of manufacturing systems. A major approach is to define an evaluation index based on distance and find a layout which minimizes it. Temporal efficiency is not considered in this stage but in later stages. The resultant temporal efficiency may not be optimal enough, since decision and optimization in those stages are performed under the fixed layout. For this reason, the authors have developed FLP methods considering temporal efficiency. Those methods provide the optimal layout plan for a fixed production scenario. However, production environments change dynamically in actual manufacturing, and the layout plan is no longer optimal after the changes. In this paper, the conventional method is enhanced considering robustness against the changes.