topic Sample size calculation for accelerated life testing in Discussions https://community.jmp.com/t5/Discussions/Sample-size-calculation-for-accelerated-life-testing/m-p/819806#M99793 <P>I am trying to use the interval explorer for parametric reliability life test planning tool for sample size required for an ALT test but need some clarification on the following questions.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</P><P>1. Is the Weibull alpha the characteristic life at stress or at use life?&nbsp;</P><P>2. Is the Quantile the pFail at stress or use life and how does the quantile impact the required sample size?</P><P>3. Is the calculated sample size the required sample size per stress or total?</P><P>&nbsp;</P><P>Thank you.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="interval explorer.png" style="width: 818px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/70745i5CCEA6FAFCCBF409/image-size/large?v=v2&amp;px=999" role="button" title="interval explorer.png" alt="interval explorer.png" /></span></P> Fri, 29 Nov 2024 16:45:22 GMT EngrAkin 2024-11-29T16:45:22Z Sample size calculation for accelerated life testing https://community.jmp.com/t5/Discussions/Sample-size-calculation-for-accelerated-life-testing/m-p/819806#M99793 <P>I am trying to use the interval explorer for parametric reliability life test planning tool for sample size required for an ALT test but need some clarification on the following questions.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</P><P>1. Is the Weibull alpha the characteristic life at stress or at use life?&nbsp;</P><P>2. Is the Quantile the pFail at stress or use life and how does the quantile impact the required sample size?</P><P>3. Is the calculated sample size the required sample size per stress or total?</P><P>&nbsp;</P><P>Thank you.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="interval explorer.png" style="width: 818px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/70745i5CCEA6FAFCCBF409/image-size/large?v=v2&amp;px=999" role="button" title="interval explorer.png" alt="interval explorer.png" /></span></P> Fri, 29 Nov 2024 16:45:22 GMT https://community.jmp.com/t5/Discussions/Sample-size-calculation-for-accelerated-life-testing/m-p/819806#M99793 EngrAkin 2024-11-29T16:45:22Z