Replacement problem - Torikaemondai (English spelling) replacement problem

Japanese: 取替問題 - とりかえもんだい（英語表記）replacement problem

This refers to problems that arise when replacing an object (for example, problems that determine the most efficient time or method of replacement), and is one of the research subjects of operations research. Replacement problems come in a variety of sizes, such as replacing products on display in a retail store, deciding when to discontinue a research topic (topic replacement), replacing the person in charge of a certain job, replacing machine parts that are prone to breaking down, and replacing equipment that deteriorates over time, but it usually refers to problems of replacing machine parts or equipment. This section will discuss problems of replacing machine parts and equipment below.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

対象物を取り替える際の問題(たとえば最も効率的な取替時期や取替方法を求める問題)をいい，オペレーションズリサーチの研究対象の一つ。取替問題の中には，小売店における陳列商品の取替え，研究テーマの打切り時期の決定(テーマの取替え)，ある仕事の担当者の取替え，故障しやすい機械部品の取替え，しだいに劣化する設備の取替えなど大小さまざまの問題があるが，普通は機械部品や設備の取替問題を指す。本項目では以下で機械部品や設備の取替問題について述べる。

出典　株式会社平凡社世界大百科事典第２版について　情報

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