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The paper is focused on available server management in Internet connected network environments. The local backup servers are hooked up by LAN and replace broken main server immediately and several different types of backup servers are also considered. The remote backup servers are hooked up by VPN (Virtual Private Network) with high-speed optical network. A Virtual Private Network (VPN) is a way to use a public network infrastructure and hooks up long-distance servers within a single network infrastructure. The remote backup servers also replace broken main severs immediately under the different conditions with local backups. When the system performs a mandatory routine maintenance of main and local backup servers, auxiliary servers from other location are being used for backups during idle periods. Analytically tractable results are obtained by using several mathematical techniques and the results are demonstrated in the framework of optimized networked server allocation problems. The operational workflow give the guidelines for the actual implementations.
The study is
based on a data set which has been corrected by the service company and
analyzed using Lean Thinking tools. It provides the application of Lean Service
into the actual service company. The project is intended to provide a pragmatic
view of Lean application. It indicates some of the key practical factors to
watch for when considering implementation aspects at each stage of the journey.
Both value identification and service quality improvement were applied. The
paper explores and clarifies Lean by showing how the process can be supported
to add incremental value. The paper demonstrates how Lean methods can be
adapted into real-world situations by applying Lean tools to the actual
company. So, companies of different service industries can also learn and adapt
the Lean approach more effectively.