問31
頻出度★★☆
リーン生産方式による業務改善の観点であるムリ, ムラ, ムダのうち, ムダに当たるものとして, 最も適切なものはどれか。
令和8年度 ITパスポート試験 問31
This question's explanation and your answers so far.
解説
問 31
Incorrectア
Work whose deliverable quality varies by the person in charge because it depends on individuals represents variation or unevenness in the result; it corresponds not to Muda but to Mura (unevenness).
Incorrectイ
Reckless plans or work standards that impose a load beyond the organization's capability are an excessive burden exceeding capacity; they correspond not to Muda but to Muri (overburden).
- ウ
正解 The correct answer is ウ. In lean production (the Toyota Production System), Muda (waste) refers to motions or work that only consume resources and time without creating any added value. The waiting and excessive processing in option ウ both spend effort and resources without raising the product's value, and they are typical examples of the Toyota Production System's seven wastes (such as waiting and over-processing). Therefore, actions that create no added value most appropriately correspond to Muda.
Incorrectエ
Work that places a burden on a part of the body for a long time and risks harming health forces an excessive load on people; it corresponds not to Muda but to Muri (overburden).
ここがポイント
- Distinguishing Muri, Mura, and Muda (the 3Ms): Muri is an excessive load beyond capability, Mura is variation or unevenness, and Muda is consumption that creates no added value; tell them apart by their definitions.
- Muda corresponds to the Toyota Production System's seven wastes (such as waiting, over-processing, and inventory); the criterion for judging it is that it consumes resources without creating value.
用語