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BS ISO 26303:2022 Machine tools. Short-term capability evaluation of machining processes on metal-cutting machine tools >
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BS ISO 26303:2022 Machine tools. Short-term capability evaluation of machining processes on metal-cutting machine tools, 2022
- undefined
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbols [Go to Page]
- 5 Preliminary remarks
- 6 Procedure for short-term capability evaluation [Go to Page]
- Figure 1 — Basic procedure for short-term capability evaluation [Go to Page]
- Table 1 — Recommended values for short-term process capability parameters [Go to Page]
- Figure 2 — Evaluation diagram [Go to Page]
- 7 Factors influencing short-term capability evaluation [Go to Page]
- Table 2 — Factors influencing short-term capability evaluation [Go to Page]
- Annex A (informative) Additional information related to statistical evaluations
- A.1 Relationship between centred and shifted distributions
- Figure A.1 — Short-term capability and shifted distribution
- A.2 Correlation between short-term range values, RV,s, and standard deviation
- Figure A.2 — Comparison of characteristic values for normal distribution
- A.3 Mean value not in the middle of the tolerance zone
- Figure A.3 — Effects if the mean value is not in the middle of the tolerance zone (offset of the mean value)
- A.4 Measurement uncertainty and short-term capability index
- Figure A.4 — Change of capability index by standard deviation of measuring device
- Figure A.5 — Standard deviation of measuring device and minimum tolerance
- A.5 Confidence level and sample size
- Figure A.6 — Confidence level and sample size, n, under the assumption of normal distribution of the characteristic values
- A.6 Type of distribution and capability index evaluation
- Figure A.7 — Influence of selected type of distribution
- Annex B (informative) Agreement forms
- Annex C (informative) Evaluation forms
- Annex D (informative) Examples of capability agreements and analysis
- Bibliography [Go to Page]