Markovian COVID-19 1 Classical systems 1 Customer preferences 1 Decision making 1 Decision matrix 1 Decisions makings 1 Economic and social effects 1 Electronic commerce 1 Entropy 1 FBWM 1 Fuzzy Decision making 1 Markov processes 1 Markovian-based decision-making 1 Open quantum systems 1 Quantum coherence 1 Quantum dynamics 1 Quantum optics 1 Quantum regimes 1 Resilience 1 Sales 1 Selection problems 1 Supplier selection 1 Supply chain management 1 Sustainability 1 Sustainable development 1 Thermodynamic quantities 1 Thermodynamics and kinetics 1 Trade off 1 Uncertainty relation 1