Which mathematical optimization technique revolutionized retail store layout design by treating product placement as nodes in a complex network to maximize customer flow and purchase probability?

In the world of retail data analytics, mathematical models serve as powerful tools for optimizing various aspects of business operations. From inventory management to customer segmentation, these mathematical frameworks help retailers make data-driven decisions. This trivia question focuses on a specific mathematical technique that revolutionized how retailers approach product placement and store layout optimization. Test your knowledge about the intersection of advanced mathematics and retail analytics!

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Markov Chain Monte Carlo (MCMC) simulations
Graph Theory with Eigenvector Centrality
Bayesian Hierarchical Clustering
Principal Component Analysis (PCA)