QC7つ道具、新QC7つ道具(QC seven tools_ New seven tools for QC)




(1) QC7つ道具; QC seven tools
    / パレート図; Pareto diagram
    / 特性要因図; cause and effect diagram, characteristic diagram, Ishikawa diagram
    / チェックシート; check sheet
    / ヒストグラム; histogram
    / 散布図; scatter diagram, scattergram
    / 管理図(グラフ); control chart, (graph)
    / 層別; stratification

(2) 新QC7つ道具; New seven tools for TQC

    / 親和図法; affinity diagram
    / 連関図法; relations diagram
    / 系統図法; tree diagram
    / マトリックス図法; matrix diagram
    / アローダイヤグラム法; arrow diagram
    / PDPC法; process decision program chart
    / マトリックスデータ解析法; matrix data analysis

2.  例文

/ The objective of stratification is to grasp a problem or to analyze its causes by looking at possible and understandable factors or items.

/ A Pareto diagram shows which defective items should be tackled first.

/ Checksheets come in several types, depending on the objective for collecting the data.

/ A scatter diagram is a tool for analyzing relationships between two variables.

/ A Histogram is a picture of variation or distribution, where data has been grouped into cells and their frequency represented as bars.

/ Control charts, first proposed by W. A. Shewhart of Bell Telephone Laboratories in 1924, are used for maintaining both process and manufacturing control in a stable condition.

/ Ishikawa diagram composed of lines and symbols is designed to represent the relationship between effects and their causes.

/ In its original form, matrix data analysis was heavy on mathematics.

/ The arrow diagram can be simple and straightforward, but over time its use has evolved to that of organizing and monitoring complex projects and situations.

/ Matrix diagrams can be used to show the relationship between two, three or four groups of information.

/ PDPC is a visual tool that combines and builds on elements of several other techniques.