2018 年 84 巻 868 号 p. 18-00133
In Japan, the Law Concerning the Rational Use of Energy (Energy Saving Law) has been revised to regulate the annual average of specific energy consumption at 1%. In December 2015, the United Nations Climate Change Conference (COP21) culminated in the Paris Agreement, which demanded global efforts to reduce greenhouse gas emissions. To solve these problems, industries have been becoming more important to evaluate and reduce energy consumption when designing, operating, and improving manufacturing systems. Therefore production management methods concurrently considering productivity and energy consumption are needed. Recently, production facilities which have an energy-saving idle state such as machining’s and industrial robots have been proposed and begin to be introduced. These facilities have two types of idle state such as an energy-saving idle state and a normal idle state. In the normal idle state, the facilities are possible to immediately start up to produce. In the energy-saving idle state, the facilities need a period to start to produce. Within keeping the energy-saving idle state, the amount of the energy consumption becomes a low level because auxiliary machines that support the facility behaviors are temporally stopped. However production management methods in a production line such as a decision support in each facility to operate the normal state to the energy-saving idle state does not propose. In this research, we propose a decision support method to operate production facility with the energy-saving idle state in production lines. We carried out a case study that is a production line which consists of three facilities.
