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Generation of 2n series fractional factorial plans robust against linear-trend

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Title Generation of 2n series fractional factorial plans robust against linear-trend
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Creator SUSHEEL KUMAR SARKAR
KRISHAN LAL
SUKANTA DASH
SUNIL KUMAR YADAV
HIMANSHU
 
Subject Fold-over
Fractional factorial plan
Linear-trend-free plan
Run orders
 
Description Not Available
agricultural, biological and industrial experiments.
However, they occur in experimental situations where the
response is dependent on the spatial or temporal position
of the experimental units within a block and thus trend
in the experimental units becomes an important nuisance
factor. In such situations, a common polynomial trend of a
specified degree over units within experimental units may be
appropriately assumed. Trend-free plans for single factor and
at two level factorial experiments (complete and fractional
both) are available in literature but trend-free multifactor
plans could not be traced in the literature except some
discussion by John (1990) where factors are at three levels.
Factorial/fractional factorial experiments are often used
in various experiments. If there is trend in the experimental
units then it is essential to sequence these factorial
experiments such that factor effects are orthogonal to the
trend. The resulting plans are termed as minimum cost
linear trend-free factorial/fractional factorial experiments.
Trends may occur in the experimental units when the
land is irrigated and the fertilizers supply the nutrients but
because of the slope, the distribution of nutrients is not
uniform. In the presence of trends, it is desired to allocate
the treatment combinations to experimental units in such a
manner that the main effects and interactions of interest are
estimated free from the linear trend effects. Such fractional
factorial plans are called robust against linear trend and the
ordered application of treatments to experimental units is
called run order (Yeh and Bradley 1983, Cheng 1988, Coster
and Cheng 1988, Majumdar and Martin 2002, Lal et al.
2005; 2007, Sarkar et al. 2009, Nguyen 2013).
Not Available
 
Date 2023-10-13T11:19:28Z
2023-10-13T11:19:28Z
2023-09-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/80591
 
Language English
 
Relation Not Available;
 
Publisher Not Available