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This Special Issue covers symmetry and asymmetry phenomena occurring in real-life problems. We invited authors to submit their theoretical or experimental research presenting engineering and economic problem solution models dealing with the symmetry or asymmetry of different types of information. The issue gained interest in the research community and received many submissions. After rigorous scientific evaluation by editors and reviewers, nine papers were accepted and published. The authors proposed different MADM and MODM solution models as integrated tools to find a balance between the components of sustainable global development, to find a symmetry axis concerning goals, risks, and constraints to cope with the complicated problems. Most approaches suggested decision models under uncertainty, combining the usual decision-making methods with interval-valued fuzzy or rough sets theory, also Z numbers. The application fields of the proposed models involved both problems of technological sciences and social sciences. The papers cover three essential areas: engineering, economy, and management. We hope that a summary of the Special Issue as provided here will encourage a detailed analysis of the papers included in the Printed Edition.

rough sets --- interval type-2 fuzzy set (IT2FS) --- resources distribution --- the criteria of the weights --- public management --- Step-wise Weight Assessment Ratio Analysis (SWARA) --- multi-criteria decision-making (MCDM) --- symmetry of the method --- quadcopter --- transaction cost --- full fuzzy environment --- dual generalized geometric Bonferroni mean (DGGBM) operator --- data logger --- information theory --- control system --- salvage value --- nonlinear dynamics --- pattern formation --- oscillations --- stability --- Pythagorean fuzzy set --- FAHP --- fuzzy sets --- group decision-making --- generalized Bonferroni mean (GBM) operator --- probabilistic systems analysis --- economic decisions --- 2-tuple linguistic neutrosophic numbers set (2TLNNSs) --- evaluating the quality of distant courses --- subjective weights --- Z-numbers --- green supplier selection --- dual generalized Bonferroni mean (DGBM) operator --- normal cloud --- thrust --- sensor --- neutrosophic numbers --- MCDM --- Bayes’ theorem --- optimal dividend --- logistics --- measurement --- hybrid MCDM --- combining the weights --- data envelopment analysis --- criteria weights --- multiple attribute decision making (MADM) --- IDOCRIW --- excess-of-loss reinsurance --- fuzzy efficiency --- multiple-criteria decision-making (MCDM) --- MCGDM --- transport --- backward cloud transformation --- engineering problems --- rough ARAS --- capital injection --- performance --- Bonferroni mean (BM) operator --- green supply chain management --- population sizes --- hybrid problem solution models --- criteria weight assessment