*2.3.2 Maintenance and availability relationship*

The maintenance ability of system measures the effectiveness of a system in terms of ease and speed when the system and equipment return after failure. The possibility of a broken system can be restored to a definite period in operational conditions. Maintenance of availability becomes meaningful:


This makes the system inaccessible in operational areas (not operational). Accessibility does not mean that only the existing elements should be in operation but that backup systems require that, although we have a definite unit. The availability of a system can be related to the reliability of the system and the ease of repairing the system and sufficient reservoirs for spare parts. For mathematical analysis, we assume that there is a system that requires continuous operation, except in cases where we need preventive and planned maintenance. In this case, we estimate the temporary backup system, or the system will be definite for a

**101**

*ANFIS to Quantify Maintenance Cost of IT Services in Telecommunication Company*

short time, but it may be operational at this time, even though some of its elements are not available. This kind of failure can be tolerated until further preventive

The ultimate goal of a system's operation is that it is available when the system is needed. In systems, things such as failure rate, average repair time, one-piece delivery time, and operational constraints are all influence in accessibility. In the context of system maintenance analysis, review and measure the operating system and backup needs in quantitative and qualitative terms regarding design criteria in

In order to a system to be available, system providers should provide the required support over the life of the software and product. The ability to support the system requires an effective combination of reliability and maintenance and

Measuring the desirable performance and operational requirements of a computer system depends on our requests from the system. Performance measurement

When a computer system typically employs several types of activity, measuring the first feature is best done separately for any type of workload. Possible classifications for workload include timed checking, transaction processing, interactive computing, and categories. Errors create a variety of failures for the system, so all measurements in the category and the second floor must be evaluated for each type of error. For example, we should only use two types of error

Failure is visible effect of error. A catastrophic failure involves losing a significant amount of information, for example, a well-designed system. The CPU error

System performance is measured by the following assessment factors [9]:

1.**Responsiveness:** This measure evaluates how a task is executed rapidly by the system. Possible measurements include waiting time, processing time, conditional wait time (the wait time for an activity requires a certain amount

2.**Level of use:** This measure evaluates how a system uses its elements and components well. Possible measurements include operating power and the use of

2.How does a system deal with unusual failure and conditions?

3.How does the system use the available resources?

may be benign, but the disk error may be catastrophic.

of processing time), queue length, and so on

*2.4.1 Measuring system performance*

*DOI: http://dx.doi.org/10.5772/intechopen.82827*

hardware and backup requirements [8].

logistics and operational engineering.

**2.4 Metric software measurement**

depends on three factors [9]

1.Slow activity

classes:

• Catastrophic

• Benign

maintenance.

*ANFIS to Quantify Maintenance Cost of IT Services in Telecommunication Company DOI: http://dx.doi.org/10.5772/intechopen.82827*

short time, but it may be operational at this time, even though some of its elements are not available. This kind of failure can be tolerated until further preventive maintenance.

The ultimate goal of a system's operation is that it is available when the system is needed. In systems, things such as failure rate, average repair time, one-piece delivery time, and operational constraints are all influence in accessibility. In the context of system maintenance analysis, review and measure the operating system and backup needs in quantitative and qualitative terms regarding design criteria in hardware and backup requirements [8].

In order to a system to be available, system providers should provide the required support over the life of the software and product. The ability to support the system requires an effective combination of reliability and maintenance and logistics and operational engineering.

## **2.4 Metric software measurement**

Measuring the desirable performance and operational requirements of a computer system depends on our requests from the system. Performance measurement depends on three factors [9]

1.Slow activity

*Maintenance Management*

tester a software control.

*2.3.1 Maintenance activity*

into three phases:

3.Troubleshooting failure

4.Provided with spare parts

then we can measure its availability.

should be repaired or replaced.

lived as well as preventive maintenance operations.

conditions. Maintenance of availability becomes meaningful:

*2.3.2 Maintenance and availability relationship*

the problem in the least amount of time.

• If repairs need more time to fix.

• If installing spare parts is very hard.

• If spare parts are not available if they are needed.

• If the testing and alignment of spare parts are difficult.

Maintenance activity is limited to determining the defective unit and its replacement or a spare part. Defective units are repaired at a central location equipped with

Lalli et al. [8] said that maintenance is divided into two parts, which include the replacement of defective elements. Moreover, preventive maintenance, which includes scheduled maintenance in the design phase, separates maintenance activity

**In Phase I:** This includes planning and designing maintenance capability, which is part of a design process that involves the construction of elements that are easy to maintain and repair. In analyzing the measuring capability, the number of errors is often used from predictable times to maintain N's maintenance. Secondly, the expected time to maintain n is the expected maintenance with the program, as well as the expected time to repair and replace items that have a limited life span and a scheduled change program. Suppose the system is shut down during maintenance,

**In Phase II:** This includes handling failure and replacing items that are short-

**In Phase III:** This involves handling fault elements that specify whether it

The maintenance ability of system measures the effectiveness of a system in terms of ease and speed when the system and equipment return after failure. The possibility of a broken system can be restored to a definite period in operational

• If the system is interrupted and cannot be fixed in a minor way, we need to find

This makes the system inaccessible in operational areas (not operational). Accessibility does not mean that only the existing elements should be in operation but that backup systems require that, although we have a definite unit. The availability of a system can be related to the reliability of the system and the ease of repairing the system and sufficient reservoirs for spare parts. For mathematical analysis, we assume that there is a system that requires continuous operation, except in cases where we need preventive and planned maintenance. In this case, we estimate the temporary backup system, or the system will be definite for a

**100**


When a computer system typically employs several types of activity, measuring the first feature is best done separately for any type of workload. Possible classifications for workload include timed checking, transaction processing, interactive computing, and categories. Errors create a variety of failures for the system, so all measurements in the category and the second floor must be evaluated for each type of error. For example, we should only use two types of error classes:


Failure is visible effect of error. A catastrophic failure involves losing a significant amount of information, for example, a well-designed system. The CPU error may be benign, but the disk error may be catastrophic.

#### *2.4.1 Measuring system performance*

System performance is measured by the following assessment factors [9]:


different resources. The purpose of this measure is to measure responsiveness and differentiation and differences. Since a system that is well used is generally slower than the responsiveness system is less used.

