問28
頻出度★★☆
コンカレントエンジニアリングの目的として, 適切なものはどれか。
平成26年度 春期 ITパスポート試験 問28
This question's explanation and your answers so far.
解説
問 28
- ア
正解 The correct answer is ア, Shortening the development period. Concurrent engineering is a development approach in which the stages of product development, such as planning, design, prototyping, production engineering, manufacturing, and procurement, are not passed serially from one stage to the next in a waterfall-like manner after the previous stage finishes. Instead, the departments involved work as a single team from the very beginning, share design information, and carry out whatever work can be done in parallel at the same time. For example, without waiting for the design to be finalized, the production engineering department starts studying dies and production lines based on information from the design still in progress, and the procurement department starts preparing parts orders. Because the stages overlap, the overall lead time becomes shorter, and problems of manufacturability or of parts procurement can be found early at the design stage, so rework discovered in later stages is also reduced. Shortening the development lead time and bringing the product to market sooner is the primary purpose of adopting concurrent engineering. Therefore ア, which states shortening the development period, is appropriate.
Incorrectイ
Improving the performance of the product being developed is wrong. The performance of a product is determined by the technologies and materials adopted and by the content of the design itself. Merely changing the way work proceeds so that stages run in parallel does not by itself raise performance. Concurrent engineering is a method that targets the way development is carried out, that is, the process, and it is not a design technique for raising the functions and performance of the product.
Incorrectウ
Improving the quality of the product being developed is wrong. Because the manufacturing department and others take part from the design stage, difficulties in making the product and defects can be found early, so an improvement in quality can indeed be expected as a result. However, that is a secondary effect of working in parallel, and it cannot be said to state the purpose of the method most appropriately. Approaches whose main aim is to build quality itself into the product are handled by other methods such as QC activities and quality function deployment.
Incorrectエ
Improving the yield rate of the production process is wrong. The yield rate is the proportion of good products obtained relative to the raw materials put in or the quantity started, and raising it is the theme of activities that aim to improve the production process and its process capability after mass production has begun, such as process control, QC activities, and improvements in production engineering. What concurrent engineering targets is not the yield of the mass production process but the duration of the entire development process up to putting the product on the market.
ここがポイント
- Concurrent engineering means carrying out stages such as design, prototyping, production preparation, and manufacturing in parallel with a cross-functional team sharing information, so as to shorten the development lead time, that is the development period, and bring the product to market sooner. Remember it in contrast with traditional development that proceeds serially.
- Distinguishing similar terms: shortening the development period leads to concurrent engineering; building product quality in from customer requirements leads to quality function deployment (QFD); improving the yield rate and defect rate of the mass production process leads to QC activities or process improvement. Judge by whether the purpose is the period, the quality, or the yield.
用語