We analyze a two-commodity queueing-inventory system with an individual ordering policy. The maximum storage capacity for the ith commodity is S-i (i = 1, 2). The reorder level for ith commodity is fixed as s(i) and whenever ...

International investors wish to measure the sovereign risk premiums of the countries they want to invest in. Credit Default Swap Spread (CDS), which also shows the credit risks, is one of the important proxies that measure ...

This paper treats a retrial queue with phase type retrial times and a threshold type-policy, where each server is subject to breakdowns and repairs. Upon a server failure, the customer whose service gets interrupted will ...

The main purpose of this study is to generate estimates of the total income and tourist arrivals in the tourism industry with the Covid-19 pandemic in the next five years (2020-2024). For this purpose, estimates were ...

In today's world, where we are in the process of information society, especially the development of internet technology and the use of the internet by large masses of people in very wide geographies have brought along a ...

A two-commodity queueing-inventory system with phase-type service times and exponential lead times is considered. There are two types of customers; Type 1 and Type 2. Demands from each customer type occur independently ...

This study investigates the development of vulnerable employment in 43 sub‐Saharan African countries by using yearly data for 1996–2018 period. The paper first outlines the main factors and discusses the issue from the ...

ABSTARCT Purpose: Football, one of the most popular and loved sports branches, always keeps its excitement, ambition, passion, joy and sadness together. European football, the football capital, is an attraction for fans ...

When disruptions or failures occur for any actor connected with global supply chain networks, it can affect all actors including suppliers, manufacturers, contractors, or freight forwarders. Supplier interruptions can ...

A queueing-inventory system where the server is subject to breakdown is examined. The products in inventory are provided by production. Two different types of customers are considered. Each customer type arrives in the ...