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statistical process control

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001732
EISBN: 978-1-62708-218-1
... reasonable processing controls. Fig. 5 Actuating link failure. A new group of 12 lock assemblies were fabricated with the corrected link and subjected to a repeat of the original cycling test. Weibull analysis of the test data, Table 2 , was repeated as previously discussed. The Weibull plot...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006817
EISBN: 978-1-62708-329-4
... its function. Which specific event should be called the cause of the failure? Typically, one selects events that can be easily controlled and that will also have a great effect on the outcome of the process. During the design phase of the lifecycle of an asset, it is easier to control minute...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003504
EISBN: 978-1-62708-180-1
... for potential failure by using specialized condition monitoring equipment, existing process instrumentation (such as flow rates, pressures, and temperatures), existing quality management techniques (such as statistical process control), or the human senses. It should be clear that an on-condition task...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003519
EISBN: 978-1-62708-180-1
... and are more commonly noted in the public domain through lawsuits and newspaper articles. The combination of fast and cheap with the use of low-cost personnel can be disastrous. Design and manufacturing engineers believe they can control the problem by making products and fabrication processes “idiot proof...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006755
EISBN: 978-1-62708-295-2
... and manufacturing engineers believe they can control the problem by making products and fabrication processes “idiot proof.” However, time and time again, failures occur that prove the “idiots” are smarter and/or more inventive than the designers think they are. Benefits of Statistics In most instances...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
... to achieve, sustain, and maximize business success ( Ref 8 ). Six Sigma is founded on the use of measurements, facts, and statistics to move organizations in directions that constantly improve and reinvent business processes ( Ref 8 ). The roots of this business system are in the statistical limits set...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006803
EISBN: 978-1-62708-329-4
... in employing a probabilistic-statistical approach to design criteria development. On the eve of the 1970s, Cornell ( Ref 6 ) developed a second-moment format and concept of a safety index. This safety index was used to account for uncertainties in the design process, much like the safety factors are used...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... Assembly Misalignment Assembly damage Defective material Inadequate bolting Connected wrong Foreign material left in General poor workmanship Shock Thermal Mechanical Improper startup Operating Slugs of liquid Process surging Control error Controls deactivated/not installed Operating error...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003514
EISBN: 978-1-62708-180-1
..., the goal of analysis is to provide a mathematical synthesis of the uncertainty that is convenient for the decision-making process. For a statistical summary, two indexes are useful. The sample mean is defined as: X ¯ = 1 n ∑ i = 1 n X i The mean is a measure...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003536
EISBN: 978-1-62708-180-1
... equations, and practical examples are provided. fracture profilometry quantitative fractography scanning electron microscope three-dimensional fracture surface reconstruction A FRACTURE SURFACE is generated by the deformation and fracture processes operative at numerous length scales ranging...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001531
EISBN: 978-1-62708-231-0
... of wheel steels used in China with different carbon content and processing were measured. Their effect on performance of cartwheel was analyzed. Ma Anshan Iron and Steel Company Ltd. (Ma Anshan City, East China) supplied the experimental materials used in the mechanical properties test. The chemical...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006832
EISBN: 978-1-62708-329-4
... before the product is manufactured. These may be introduced during any phase of the life cycle of the product, from design conceptualization to testing. Manufacturing defects are defects acquired during the manufacturing process, which may or may not compromise product safety. Manufacturing defects...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006816
EISBN: 978-1-62708-329-4
...). The identification and elimination of the root cause of failure becomes extremely difficult if the controls and records of these controls are shoddy or nonexistent. Thus, most manufacturing companies have statistical quality-control and statistical process-control programs that document and analyze incoming...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
... and classifying materials as acceptable, salvageable, or scrap and for process control. Ultrasonic testing can also be used to make accurate measurements of thickness when only one side of a component is accessible. Applications include: Piping and pressure vessels Bridges and structures Thickness...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... of corrosion-control methods, equipment, and services; cost of labor attributed to corrosion management; cost of use of more expensive materials to lessen corrosion damage; and cost of lost revenue, loss of reliability, and loss of capital due to corrosion deterioration. Only selected industrial sectors were...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003505
EISBN: 978-1-62708-180-1
... or beyond our control. Risk is doubtful or uncertain danger, often incurred voluntarily.” One can also consider a hazard as any aspect of technology or activity that produces risk; as the potential for harm or damage to people, property, or the environment; and as including the characteristics of things...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003528
EISBN: 978-1-62708-180-1
... well the manufacturing processes are controlled. Such scatter (or lack of process control) in and of itself can be a contributing factor to a wide variability in the effective service-life-to-failure period for components manufactured with uncontrolled or poorly controlled processes. This can result...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003563
EISBN: 978-1-62708-180-1
... on the statistical treatment of full-scale bearing tests conducted under controlled environments, for example, full-film lubrication regime, dust-free environment, and so on. Although these controlled environments are useful indicators of the RCF performance of rolling-element bearings, the actual life of a given...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006768
EISBN: 978-1-62708-295-2
.... et al. , “ Retained Austenite and Its Measurement by X-Ray Diffraction ,” SP-453, Society of Automotive Engineers , 1980 10.4271/800426 27. Ruud C.O. , X-Ray Diffraction Methods for Process Monitoring and Quality Control , Topics on Nondestructive Evaluation Series , Vol 1...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001504
EISBN: 978-1-62708-217-4
... and Prevention , Vol 11 , ASM Handbook , ASM International , 2002 , p 823 – 860 10.31399/asm.hb.v11.a0003553 Landing gears are designed to provide aircraft support and control when on the ground (steering and stopping) and to absorb the loads associated with landing and taxiing. Since...