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selections are narrowed down to four or
five choices.
MAKING SELECTIONS
Materials concept selection
. All ma-
terials information and relevant proper-
ties from suppliers and in-house testing
data are collected and loaded into the
QFD benchmark section of the matrix to
compare properties and rate key prop-
erties to be input into both the PUGH
matrix and cause and effects (C&E)
matrix.
PUGH concept selection
. The PUGH
matrix
[6]
is constructed using the cur-
rent material grade or current technical
requirement as the datum point. Key
measures or properties of the materials
selected are compared against the da-
tum. Scoring is performed based onma-
terials properties evaluation, rated as
“
+
” indicating better than the current
datum, “S” meaning similar to datum,
and “-” meaning worse than datum.
After the PUGH matrix is populated
based on the criteria, ranking for each
material choice is derived for a concept
Fig. 4 −
Benchmark section of QFD.
Fig. 5 −
PUGH concept selection matrix.