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statistical analysis

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260233
EISBN: 978-1-62708-336-2
... and analysis for those who are not familiar with these techniques. Wolf ( Ref 2 ) reviewed the application of five of the seven tools, including Pareto charts, flow process charts, histograms, run charts, and control charts of statistical process control (SPC) to the aluminum extrusion and drawn-tube processes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180061
EISBN: 978-1-62708-256-3
... Abstract Statistics, data analysis, root cause analysis, and problem-solving processes play a key role in failure investigations. This chapter explains how to collect failure investigation data, how to build and maintain a database for company-related failures, and how to use corresponding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780157
EISBN: 978-1-62708-268-6
... Abstract Failure analysis can sometimes involve considerations of statistics and probability. This chapter reviews some of the basic types of statistical distributions in order to understand some basic principles in their use. The main focus is on the uses of the normal distribution, which...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440243
EISBN: 978-1-62708-262-4
... of statistical analysis, quality can be assured. Quality cannot be inspected into a part, but proper attention to each step of the process can identify sources of problems and prevent their occurrence. As demand for increased quality and documentation has been experienced by heat treaters, the subject...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260213
EISBN: 978-1-62708-336-2
... for statistical analysis. Fig. 5 Typical flow diagram of billet casting variables Extrusion Die Variables Dies for Solid and Hollow Shapes Die construction is one of the most important determinants in the successful extrusion of even the simplest shapes. Many factors affect the running...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... in thickness from some preset standard and provide a digital readout and a permanent record of results for statistical analysis. The use of measuring systems employing capacitance, electrical contact, or linear displacement transducers are capable of high accuracy and the output can be linked directly...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060001
EISBN: 978-1-62708-355-3
.... The calculations at this stage are the first level of data analysis. The calculations required usually are defined in the test procedure or specification. A brief statistical summary for the sample is a feature that is becoming more common with the proliferation of computerized testing systems, because...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110666
EISBN: 978-1-62708-247-1
... design Eyring models failure analysis outlier screening power law models quality reliability statistical distribution Although failure analysis serves to determine the cause and impact of failures with an eye to appropriate corrective action, it is worth noting that this activity...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200220
EISBN: 978-1-62708-354-6
... of the complexities of the casting process, and thus improving process control and quality level. Modern statistical analytical software makes the task of evaluating the results of designed experiments easier. A computer analysis of a designed experiment is shown in Figure 17-10 . The relative significance of each...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780171
EISBN: 978-1-62708-268-6
.... The concept is that the failure analysis team can compare two or more groups of product (one with the suspect cause present, the other without) using the ANOVA technique to determine if the cause makes a difference. ANOVA is a statistical method that evaluates variability using mathematical calculations...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250311
EISBN: 978-1-62708-345-4
... roughness, ratio of elastohydrodynamic lubricant film thickness to composite roughness, wear, and wear rate. A Weibull statistical analysis of this set of results is shown graphically in Fig. 4 . Comparisons between variants are made on either a G10 life or a G50 life basis. Figure 3 shows...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850410
EISBN: 978-1-62708-260-0
... with a 95 percent confidence level. In general, to reduce the observed relative accuracy to one-half the value obtained after x measurements, four times x measurements must be performed in addition. The statistical analysis procedure is given in the section on volume fraction measurements. In nearly...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110506
EISBN: 978-1-62708-247-1
...-test bitmap tools must be sophisticated enough to provide high quality data analysis and mining. They need to include automatic failure mode recognition software for defect classification [3] , data analysis tools based upon statistical methods, and powerful interactive data mining features. (See...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780075
EISBN: 978-1-62708-268-6
... error (discussed subsequently), or normal statistical variability if the inspection was performed on a sampling basis. Test data: In addition to dimensional inspections, manufacturers and suppliers often test materials, components, and subassemblies. The failure analysis team should review test...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110613
EISBN: 978-1-62708-247-1
..., test engineering, and failure analysis. Figure 18 shows the statistical timing variation on a signal path measured on twenty-five 0.25 μm technology wafers with cumulative propagation delays measured on 910 die in each wafer [29] . The initial rise in the plots shows a near straight line...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200206
EISBN: 978-1-62708-354-6
... process variables ( 2 ) Variation can be measured and characterized in several ways using the methods of descriptive statistics. One of the more useful books available is the “Manual on Presentation of Data and Control Chart Analysis” provided by ASTM ( 7 ). While describing several tabular...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200065
EISBN: 978-1-62708-354-6
..., and corrective action. The extensive use of statistical techniques is encouraged for process analysis and control. Major goals are to prevent nonconformity through personnel training, process optimization, and detailed procedures. If a quality problem occurs at any step in the manufacturing process or after...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110634
EISBN: 978-1-62708-247-1
... without pass/fail limits – and then a post-processing step is used to perform data analysis and to identify outliers [21] - [24] . These outliers can either be rejected or they could be subject to additional testing [50] . Automated real-time statistical analysis can enable the testing process...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780081
EISBN: 978-1-62708-268-6
...-on-one basis (rather than having everyone on the failure analysis team show up in the work center), and asking open-ended questions (rather than questions that can be answered with a “yes” or a “no”) are approaches that work well. In companies that use statistical process control (SPC), the SPC...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780067
EISBN: 978-1-62708-268-6
... analysis Analytical equipment Mechanical and electronic component failures Leaks Contamination Design analysis Statistical considerations Design of experiments After discussing the aforementioned topics, the last two steps in the four-step problem-solving process are addressed...