id: 02154955
dt: j
an: 02154955
au: Chu, Tachung; Huang, Kuoshi; Chang, Tzuming
ti: COA defuzzification method for evaluating $C_{pk}$ under fuzzy
    environments.
so: J. Discrete Math. Sci. Cryptography 7, No. 3, 271-280 (2004).
py: 2004
pu: Taru Publications, New Delhi, Delhi, India
la: EN
cc: 
ut: center of area; process capacity index; triangular fuzzy number
ci: 
li: 
ab: Summary: This work suggests a COA (center of area) defuzzification method
    for evaluating the process capacity index $C_{pk}$ under a fuzzy
    environment, where the output data from measuring product quality is
    assessed in linguistic values represented by fuzzy numbers. The idea is
    first to defuzzify all the fuzzy output data into crisp values via COA.
    The $C_{pk}$ can then be easily calculated and obtained as in a crisp
    environment. The suggested method avoids complex arithmetic operations
    and the ranking procedure of fuzzy numbers. The applied COA formula
    produces two equal areas under the membership function of triangular
    fuzzy numbers.
rv: