CRE_可靠性数据搜集及分析.pdf

Certified Reliability Engineer. Ch 8. Data Collection Analysis. Industrial Engineering Management Systems Research Center. ■ Types of Data. [CRE Primer Ⅸ p2-3] Variable Data. ․ Variable data is continuous. This means that the data values can be any real number, for example, 1.037, -4.69, 84.35. ․ Measured data (variable data) are answers to questions like how long, what volume, how much time and how far. Attribute Data. ․ Attribute data is discrete. This means that the data values can only be integers, for example, 3, 48, 1029. ․ Counted data or attribute data are answers to question like how many or what kind. Locational Data. ․ Locational data simply answers the question where. Chart that utilize locational data are often called measles charts or concentration charts. - 1 - ■ Censored and Incomplete Data Sets. [CRE Primer Ⅸ p4-5] Right Censored. ․ The value of the censored items in the data set are known to be greater than the censored value. Left Censored. ․ The value of the censored items in the data set are known to be less than the censored value. Single Censored. ․ There is only one point at which censoring occurs. - 2 - ■ Censored and Incomplete Data Set