*3.1.5 Network availability*

The availability of network resources relates to the timely behavior of a network and network equipment, that is, when the system is uptime and can work satisfactorily at any point of time, especially when the system is in repair. Accessibility is the key feature to any organization that exchanges vast amounts of data in their databases, and it is important in critical measurements, but it is important for daily operations. Some failures sometimes rise to concerns for network administrators. It may require some changes, but today, in large organizations, backup equipment is needed to reduce the risk of loss. In the studied organization of this research, the existence of backup equipment has reduced the downtime and raised availability of the system in this regard. There are four numbers of indicators measured in this study for this service.

**Figure 1.** *Workflow diagram.*

### *3.1.6 Turnaround time availability*

The amount of time spent to do a specific request. The turnaround time is total time between sending a program, a processor, to a complete output for the client and the user. And sometimes it may return to the total time required to complete a process. And it can provide the expected output to the user after the program execution. An indicator turnaround time is used to evaluate the operating system programming algorithm. Here is the period of time a request is executed from the user's side.
