Chapter 8
Fuzzy Logic and Fuzzy Based Multi
Criteria Decision Analysis
Berna Uzun, Dilber Uzun Ozsahin, and Basil Duwa
Abstract Fuzzy logic is an arithmetic that allows programs on a computer to simulate the real world problems. This is a simple method to reason with uncertain, diverse
and inaccurate data or knowledge. In Boolean logic, any statement is considered true
or false; that is, it contains the true meaning of 1 or 0. Numerous Booleans impose
strict membership requests. In fuzzy environment, every elements defined with the
degree of its membership, and clear reasoning is considered as a limiting case of
indicative thinking. Therefore, Boolean logic is considered a subset of fuzzy logic.
People take part in the analysis of conclusions because the adoption of conclusions
must take into account the subjectivity of a person, and not only apply impartial
probabilistic measures. The vagueness of the situations are commonly arrises in the
real world problems. In fuzzy logic it is accepted to do the necessary calculations in
the environment in which goals and limits of the problem does not have the ability
to be literally defined or literally presented in exact form. Zadeh proposed using the
concept of fuzzy sets as a modelling tool for difficult systems that have every chance
of being controlled by people, but which are difficult to literally qualify to deal with
high-quality, inaccurate information or even poorly structured conclusion problems.
Fuzzy based multi criteria decision analysis is the approach that allow the decision
B. Uzun (B) · D. Uzun Ozsahin
DESAM Institute, Near East University, Nicosia, Turkish Republic of Northern Cyprus, Turkey
e-mail: berna.uzun@neu.edu.tr
D. Uzun Ozsahin
e-mail: dilber.uzunozsahin@neu.edu.tr
B. Uzun
Department of Mathematics, Near East University, Nicosia, Turkish Republic of Northern Cyprus,
Turkey
D. Uzun Ozsahin · B. Duwa
Department of Biomedical Engineering, Near East University, Nicosia, Turkish Republic of
Northern Cyprus, Turkey
D. Uzun Ozsahin
Medical Diagnostic Imaging Department, College of Health Science, University of Sharjah,
Sharjah, United Arab Emirates
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2021
D. Uzun Ozsahin et al. (eds.), Application of Multi-Criteria Decision Analysis in
Environmental and Civil Engineering, Professional Practice in Earth Sciences,
https://doi.org/10.1007/978-3-030-64765-0_8
47
Fuzzy Logic and Fuzzy Based Multi
Criteria Decision Analysis
Berna Uzun, Dilber Uzun Ozsahin, and Basil Duwa
Abstract Fuzzy logic is an arithmetic that allows programs on a computer to simulate the real world problems. This is a simple method to reason with uncertain, diverse
and inaccurate data or knowledge. In Boolean logic, any statement is considered true
or false; that is, it contains the true meaning of 1 or 0. Numerous Booleans impose
strict membership requests. In fuzzy environment, every elements defined with the
degree of its membership, and clear reasoning is considered as a limiting case of
indicative thinking. Therefore, Boolean logic is considered a subset of fuzzy logic.
People take part in the analysis of conclusions because the adoption of conclusions
must take into account the subjectivity of a person, and not only apply impartial
probabilistic measures. The vagueness of the situations are commonly arrises in the
real world problems. In fuzzy logic it is accepted to do the necessary calculations in
the environment in which goals and limits of the problem does not have the ability
to be literally defined or literally presented in exact form. Zadeh proposed using the
concept of fuzzy sets as a modelling tool for difficult systems that have every chance
of being controlled by people, but which are difficult to literally qualify to deal with
high-quality, inaccurate information or even poorly structured conclusion problems.
Fuzzy based multi criteria decision analysis is the approach that allow the decision
B. Uzun (B) · D. Uzun Ozsahin
DESAM Institute, Near East University, Nicosia, Turkish Republic of Northern Cyprus, Turkey
e-mail: berna.uzun@neu.edu.tr
D. Uzun Ozsahin
e-mail: dilber.uzunozsahin@neu.edu.tr
B. Uzun
Department of Mathematics, Near East University, Nicosia, Turkish Republic of Northern Cyprus,
Turkey
D. Uzun Ozsahin · B. Duwa
Department of Biomedical Engineering, Near East University, Nicosia, Turkish Republic of
Northern Cyprus, Turkey
D. Uzun Ozsahin
Medical Diagnostic Imaging Department, College of Health Science, University of Sharjah,
Sharjah, United Arab Emirates
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2021
D. Uzun Ozsahin et al. (eds.), Application of Multi-Criteria Decision Analysis in
Environmental and Civil Engineering, Professional Practice in Earth Sciences,
https://doi.org/10.1007/978-3-030-64765-0_8
47