ISO 22514-3 Statistical methods in process management — Capability and performance — Part 3: Machine performance studies for measured data on discrete parts

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ISO 22514-3 Document Information:

Title
Statistical methods in process management — Capability and performance — Part 3: Machine performance studies for measured data on discrete parts

International Organization for Standardization

Publication Date:
Feb 15, 2008

Scope:

This part of ISO 22514 prescribes the steps to be taken in conducting short-term performance studies that are typically performed on machines where parts produced consecutively under repeatability conditions are considered. The number of observations to be analysed will vary according to the patterns the data produce, or if the runs (the rate at which items are produced) on the machine are low in quantity. The methods are not recommended where the sample size produced is less than 30 observations. Methods to be used for handling the data and carrying out the calculations are described. In addition, machine performance indices and the actions required at the conclusion of a machine performance study are described.

The document is not applicable when tool wear patterns are expected to be present during the duration of the study, nor if autocorrelation between observations is present. The situation where a machine has captured the data, sometimes thousands of data points collected in a minute, is not considered suitable for the application of this part of ISO 22514.

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