Abstract
After 2011 Tohoku Earthquake, all enterprises in Japan must save energy continually. Especially, to save energy while keeping the production quality and the production volume is required in the manufacturing. This paper describes a visualization technique to analyze causalities among the productivity indices and energy for improving energy efficiency of factory equipment. As the result of the visualization in our factory, our proposed technique could successfully improve the energy efficiency on a molding machine, a press machine and compressors without a negative effect to the productivity that means production volume and supply pressure.