Σύγκριση μεθόδων

	Μοντέλο Πωλητή Εφημερίδων	Στοχαστική Βελτιστοποίηση
Πεδίο	Επιχειρησιακή Έρευνα	Βελτιστοποίηση
Οικογένεια	Regression model	Process / pipeline
Έτος προέλευσης	1951	1951 (SGD); 2014 (Adam)
Δημιουργός	Arrow, Harris & Marschak	—
Τύπος	Stochastic single-period inventory optimization	Gradient-based iterative optimization
Θεμελιώδης πηγή	Arrow, K. J., Harris, T., & Marschak, J. (1951). Optimal inventory policy. Econometrica, 19(3), 250–272.	Robbins, H. & Monro, S. (1951). A Stochastic Approximation Method. Annals of Mathematical Statistics, 22(3), 400-407.
Εναλλακτικές ονομασίες	Newsboy Model, Single-Period Inventory Model, Christmas Tree Problem, Gazete Satıcısı Modeli	Stokastik Optimizasyon (SGD & Varyantları), stochastic gradient descent, SGD, Adam
Συναφείς	3	3
Σύνοψη	The Newsvendor Model is a single-period stochastic inventory optimization framework that determines the profit-maximizing order quantity when demand is uncertain and unsold units cannot be carried forward. Formally introduced by Arrow, Harris, and Marschak (1951) in their foundational work on optimal inventory policy, the model balances the cost of ordering too much (overage) against the cost of ordering too little (underage) to yield a closed-form optimality condition known as the critical ratio.	Stochastic optimization is a family of iterative methods that minimize an objective function by computing gradients on randomly sampled subsets of data — mini-batches — rather than on the entire dataset at once. Pioneered by Robbins and Monro in 1951 as stochastic approximation, the approach became the standard engine for training large-scale machine-learning models through variants such as SGD with momentum, AdaGrad, RMSProp, and Adam.