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CRE_可靠性数据搜集及分析
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
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