  Queueing-inventory systems are integrated systems consisting of two emerging
fields in applied probability, namely "Queues" and "Inventory". In this paper,
we present a comprehensive review of the theory and applications of
queueing-inventory systems from 2016 to 2023 and a detailed discussion of the
recent literature by encompassing the topics like product-form solutions,
production-inventory, perishable inventory, the retrial of unsatisfied
customers/vacation/vacation interruption, multi-servers, multi-commodity,
multi-class customers, postponed demands, and game-theoretic analysis on
queueing-inventory systems, and other applications in various fields such as
energy harvesting in the wireless network, supply chain, etc. The review
provides insights into the importance of queueing-inventory systems,
systematically discussing the developments and their applications, challenges,
and future directions.
