摘要:

Design of experiments and analysis of data from designed experiments are well-established methodologies in which statisticians are formally trained. Another critical and rarely taught skill is the planning that precedes designing an experiment. This article suggests a set of tools for presenting generic technical issues and experimental features found in industrial experiments. These tools are predesign experiment guide sheets to systematize the planning process and to produce organized written documentation. They also help experimenters discuss complex trade-offs between practical limitations and statistical preferences in the experiment. A case study involving the (computer numerical control) CNC-machining of jet engine impellers is included.

ISSN:0040-1706    

DOI:10.1080/00401706.1993.10484984

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1993.10484985

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1993.10484986

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1993.10484987

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1993.10484988

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1993.10484989

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Supersaturated designs are useful in situations in which the number of active factors is very small compared to the total number of factors being considered. In this article, a new class of supersaturated designs is constructed using half fractions of Hadamard matrices. When a Hadamard matrix of orderNis used, such a design can investigate up toN–2factors inN/2 runs. Results are given forN≤ 60. Extension to largerNis straightforward. These designs are superior to other existing supersaturated designs and are easy to construct. An example with real data is used to illustrate the ideas.

ISSN:0040-1706    

DOI:10.1080/00401706.1993.10484990

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

In this article, several methods are given for constructing orthogonal main-effect plans that require a minimal number of runs and yet have a maximal number of repeated observations. These designs yield an unbiased estimate of pure error and provide a means of testing the assumption of no interactions among main effects.

ISSN:0040-1706    

DOI:10.1080/00401706.1993.10484991

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

This article discusses situations in which one is interested in evaluating the run-length characteristics of a cumulative sum control scheme when the underlying data show the presence of serial correlation. In practical applications, situations of this type are common in problems associated with monitoring such characteristics of data as forecasting errors, measures of model adequacy, and variance components. The discussed problem is also relevant in situations in which data transformations are used to reduce the magnitude of serial correlation. The basic idea of analysis involves replacing the sequence of serially correlated observations by a sequence of independent and identically distributed observations for which the runlength characteristics of interest are roughly the same. Applications of the proposed method for several classes of processes arising in the area of statistical process control are discussed in detail, and it is shown that it leads to approximations that can be considered acceptable in many practical situations.

ISSN:0040-1706    

DOI:10.1080/00401706.1993.10484992

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

The on-line quality-monitoring procedures for attributes presented by Taguchi, Elsayed, and Hsiang are examined. Their method for obtaining monitoring strategies is compared with the work of Gibra and Barlow, Hunter, and Proschan. An economic model under a geometric process failure mechanism is developed, and a comparison is made between methods optimal under that model and the methods of Taguchi et al. In some cases, there are important practical differences in the two approaches. KEY WORDS: Economic model; Process failure mechanism; Statistical process control.

ISSN:0040-1706    

DOI:10.1080/00401706.1993.10484993

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor