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statistical quality control

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Published: 01 March 2000
Fig. 3 Flow diagram of statistical quality control for extrusion die variables More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260233
EISBN: 978-1-62708-336-2
... Abstract This chapter provides an introduction to statistical process control and the concept of total quality management. It begins with a review of quality improvement efforts in the extrusion industry and the considerations involved in developing sampling plans and interpreting control...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440243
EISBN: 978-1-62708-262-4
.... The steps include selecting proper material and design of the part being treated; determining whether the process is capable of heat treatment; using statistical process control, control charting, and in-process inspection and testing; and applying statistical quality control and final testing (sampling...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440283
EISBN: 978-1-62708-262-4
... with test coupons in conjunction with statistical quality control (SQC) on heat treated parts, critical process variations may be identified and controlled. Typical Example of Use: Monitoring Carburizing and Hardening of Gears Test pins were used to monitor carburizing and hardening processing for 5...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110666
EISBN: 978-1-62708-247-1
... control of many process parameters. Slight variations of these parameters can drastically (and negatively) affect product yield [1] . Process Control Statistical Process Control (SPC) is a systematic way of controlling quality through the use of statistical process programs or “charts...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200220
EISBN: 978-1-62708-354-6
... are utilizing a number of statistically based systems to evaluate the control of the casting processes, and to improve the quality level and the consistency of their castings. The diagram shown in Figure 17-4 is a flow chart which shows how these methods are related to a Quality Improvement Program. Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260213
EISBN: 978-1-62708-336-2
... Stretching and sawing checklist Extrusion Process Control Chart For the statistical process and quality control of the extrusion process, it is important to collect the process variables. The extrusion variables included in the flow diagram with quality checkpoints for the statistical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200206
EISBN: 978-1-62708-354-6
... System Analysis ,” 1990 7. ASTM MNL7 , “ Manual on Presentation of Data and Control Chart Analysis ,” Philadelphia, PA , 6 th ed., 1990 8. Shapiro S.S. , “ How to Test Normality and Other Distributional Assumptions ,” ASQC Basic References in Quality Control: Statistical Techniques...
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
... of which are used to evaluate the soundness of the casting. These inspections add to the cost of the product; therefore, the initial consideration must be to determine the amount of inspection needed to maintain adequate control over quality. In some cases, this may require full inspection of each...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050281
EISBN: 978-1-62708-311-9
... be used to record the processing variables with their limits and settings. The fundamental concept of statistical process control is that process adjustment is made on an ongoing basis to keep the process in control. Quality induction hardened parts are produced through intention with thorough planning...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980551
EISBN: 978-1-62708-342-3
..., and disadvantages. It describes the process chain for order processing within the quality circle and provides information on product liability legal issues. In addition, the chapter discusses the processes involved in quality control, along with its organization, responsibilities, audits, and testing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180061
EISBN: 978-1-62708-256-3
... treatment 14 Design error 12 Unexpected operating conditions 9 Inadequate environmental control 5 Improper inspection/quality control 4 Wrong material 3 The various failure origins listed in Table 1 , including improper material selection, fabrication defects, design error...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200065
EISBN: 978-1-62708-354-6
... status Control of nonconforming product Corrective action Handling, storage, packaging, and delivery Quality records Internal quality audits Training Statistical techniques A quality assurance system based upon these 18 points will probably satisfy the major requirements of any...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720001
EISBN: 978-1-62708-305-8
... of statistical control can enable continual product manufacturing with minimum testing and a high level of quality. Because many hardness tests are done rapidly, they are well suited for use with SPC techniques. Users are cautioned that the proper testing procedures must be followed to ensure the high degree...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780089
EISBN: 978-1-62708-281-5
... suited to quality control applications. Quality control testing using liquid chromatography varies from a simple qualitative visual match between a sample chromatogram and that of a control to a complete quantitative analysis with the attendant statistical treatment of data and retention...
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
.... This is especially true in highly regulated industries, such as aerospace, defense, biomedical, cosmetics, and food manufacturers. These records are retained in the organization’s quality-assurance files and database. The failure analysis team should review these records for nonconformances, and the team should do...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320323
EISBN: 978-1-62708-332-4
... Abstract This chapter provides an overview of key elements in controlling the casting process, systems to confirm the quality of outgoing components, and the steps needed to launch a novel product. The discussion also provides information on process control tools and techniques; incoming...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720365
EISBN: 978-1-62708-305-8
... these types of discontinuities. The inspection of aluminum alloy forgings takes two forms: in-process inspection and final inspection. In-process inspection, using techniques such as statistical process control and/or statistical quality control, is used to determine if the product being manufactured...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060001
EISBN: 978-1-62708-355-3
...) and proper (right) alignment of specimen in wedge grips Fig. 12 Proper and improper engagement of a specimen in wedge grips Abstract Tensile tests are performed for several reasons related to materials development, comparison, selection, and quality control. The properties derived from...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720063
EISBN: 978-1-62708-305-8
... vision MACHINE VISION emerged as an important new technique for industrial inspection and quality control in the early 1980s. When properly applied, machine vision can provide accurate and inexpensive 100% inspection of workpieces, dramatically increasing product quality. Machine vision is also used...