KR101369341B1 - System for constructing integrated management database of electronic circuit board - Google Patents

Abstract

The present invention relates to a system and method for establishing an integrated management database of an electronic circuit board, and a management system for an electronic circuit board using the same. The purpose is to derive the standard and replacement parts.
The present invention for achieving this object, the list generation unit for selecting the analysis target system of the nuclear power plant, and for creating a list of electronic circuit boards for each system; A part information creating unit to create part information of the selected electronic circuit board; An investigation and analysis unit for investigating and analyzing field failure history of the selected electronic circuit board; A calculation unit for calculating a failure rate and design life of the selected electronic circuit board; And a maintenance policy information estimating unit estimating maintenance policy information according to the design life of the electronic circuit board. .

Description

SYSTEM FOR CONSTRUCTING INTEGRATED MANAGEMENT DATABASE OF ELECTRONIC CIRCUIT BOARD}

The present invention relates to a system for establishing an integrated management database of an electronic circuit board, and more particularly, to select an analysis target electronic circuit board of a nuclear power plant, investigate field failure history of the electronic circuit board, and determine a failure rate and design life. The present invention relates to a database construction system that calculates and establishes a maintenance policy for each design life.

In a plant that needs to operate continuously for a year and a half or two years after the system starts to operate once, such as in a nuclear power plant, once the operation is stopped due to a device failure or a breakdown of the control system, it is restored to start operation again. It takes a lot of time. This causes a lot of damage, and if a failure occurs at the peak of the heating and cooling peaks with a high demand for electricity, it may cause serious damage to the entire power system, such as having to cut out power in some areas. Therefore, when the maintenance of the nuclear power plant is performed, the preliminary predictive maintenance technology that periodically performs performance checks on the electronic circuit boards for various controls and repairs them or replaces them with normal boards in advance is necessary. need. In other words, it is possible to increase the driving efficiency and ensure safe operation of the power system by avoiding accidental shutdown.

Therefore, nuclear power plants are designed, manufactured, installed, and verified to have sufficient durability to maintain their unique functions in order for the operation system of many devices, electronic cards, and systems consisting of cutting-edge electronic systems to operate normally. Should be.

In particular, the electronic card needs to be predicted and eliminated in advance by causing periodical functional checks to maintain the unique functions of the equipment throughout its lifetime. As the system is not established, the current state is only checked and maintained. As a result, the life prediction method is introduced and applied to safe operation of nuclear power plants as well as to continue operation.

On the other hand, with respect to the technology for the inspection and maintenance of the nuclear power plant electronic circuit board, a number of applications and publications other than Korea Patent Publication No. 10-2007-0035142 (hereinafter referred to as "prior literature") is disclosed.

The method according to the prior art, as shown in Figure 1, the test preparation step of cleaning the electronic circuit board to be inspected and removing the insulating coating of the soldered portion; Appearance structure inspection step of inspecting the attachment state between the electronic component and the electronic circuit board; A component inspection step of individually inspecting the performance of critical components; A function checking step of checking whether an output signal is normally output by applying an operating voltage and an input signal to the electronic circuit board; Estimating whether the result is passed or failed by estimating the inspection result and the board design data and the durability of the component in the component inspection step; Insulating coating the soldered portion of the passed electronic circuit board or the failed electronic circuit board after the repair process; And finally performing a functional check; .

In other words, the above-mentioned prior document is a post-mortem method of repairing when the result of the detailed inspection of the electronic circuit board is found to be deterioration, and is a preliminary and fundamental factor that can prevent the sudden stop of the nuclear power plant due to the failure of the electronic circuit board. There was a problem that could not be solved.

The present invention has been made in view of the above problems, and a first object of the present invention is to derive replacement standards, maintenance standards, and replacement parts by model through life analysis of safety-related electronic circuit boards of nuclear power plants. There is.

In addition, a second object of the present invention is to build a database for setting the optimal maintenance standards by properly reflecting the site failure history and maintenance experience for safety-related electronic circuit boards of nuclear power plants.

In addition, the third object of the present invention is to calculate the failure rate and design life through the field data survey on the safety-related electronic circuit board of the nuclear power plant, and to carry out the reinforcement analysis of the specific model to build an integrated management database To make recommendations on maintenance cycles and maintenance policies.

The present invention for achieving the technical problem relates to a system for establishing an integrated management database of the electronic circuit board, a list preparation unit for selecting the analysis target system of the nuclear power generation equipment, and creating a list of electronic circuit boards for each system; A part information creating unit to create part information of the selected electronic circuit board; An investigation and analysis unit for investigating and analyzing field failure history of the selected electronic circuit board; A calculation unit for calculating a failure rate and design life of the selected electronic circuit board; And a maintenance policy information estimating unit estimating maintenance policy information according to the design life of the electronic circuit board. .

On the other hand, the present invention relates to a method for establishing an integrated management database of electronic circuit boards, comprising: (a) a list preparation unit selecting an analysis target system of a nuclear power plant and preparing a list of electronic circuit boards for each system; (b) creating component information of the electronic circuit board selected by the component information preparing unit; (c) investigating and analyzing a field failure history of the electronic circuit board selected by the research and analysis unit; (d) calculating a failure rate and design life of the selected electronic circuit board; And (e) a policy information estimating unit estimating maintenance policy information according to the design life of the electronic circuit board; .

The present invention relates to an electronic circuit board management system, comprising: a database unit for storing information of an electronic circuit board; A failure rate and design life calculation unit for managing and analyzing the information stored in the database unit to calculate a failure rate and design life based on the maintenance history of the electronic circuit board and the components; Maintenance policy ruler for regularizing the construction and maintenance policy of the standardized fault code based on maintenance history information and design life; And a maintenance request unit for transmitting the maintenance instruction or request information for the electronic circuit board to the outside according to a regular maintenance policy. .

According to the present invention as described above, through the life analysis of the safety-related electronic circuit board of the nuclear power plant has the effect of deriving the replacement standards, maintenance standards and replacement significant parts for each model.

In addition, according to the present invention, there is an effect that it is possible to build an integrated management database for setting the optimal maintenance standards by properly reflecting the site failure history and maintenance status for the safety-related electronic circuit board of the nuclear power plant.

And according to the present invention, through the field data survey on the safety-related electronic circuit board of the nuclear power plant, the design life and failure rate calculation and the establishment of an integrated management database for the specific model, and at the same time draw a recommendation for replacement cycle and maintenance cycle There is also an effect.

1 is a whole flow chart of the conventional nuclear power plant electronic circuit board precision inspection and maintenance method.
Figure 2 is a schematic diagram showing a conceptual diagram showing a system for building an integrated management database of the electronic circuit board according to the present invention.
Figure 3 is a flow chart showing the selection process of the analysis target system according to the present invention.
4 is an overall flowchart of a method for establishing an integrated management database of an electronic circuit board according to the present invention;
5 is an overall configuration diagram conceptually showing the electronic circuit board management system according to the present invention.
Figure 6 is an exemplary view showing a basic screen of the electronic circuit board management system according to the present invention.
Figure 7 is an exemplary view showing a maintenance standard management screen for each substrate according to the present invention.

Specific features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. It is to be noted that the detailed description of known functions and constructions related to the present invention is omitted when it is determined that the gist of the present invention may be unnecessarily blurred.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

A system and method for constructing an integrated management database for an electronic circuit board according to the present invention and an electronic circuit board management system generated through the same will be described below with reference to FIGS. 2 to 7.

2 is an overall configuration diagram conceptually showing an integrated management database construction system 100 of an electronic circuit board according to the present invention, and as shown, a list creation unit 110, a part information creation unit 120, a survey and The analysis unit 130, the calculation unit 140 and the maintenance policy information estimation unit 150 is made.

In detail, the list preparing unit 110 selects an analysis target system of the nuclear power plant and prepares a list of electronic circuit boards for each system.

Here, the list preparation unit 110 is based on whether the analysis target system is subject to periodic safety assessment (PSR), whether or not to stop the power generation, whether to perform the electronic circuit board precision inspection service (PIMS) plan / current prevention maintenance and facility improvement The first selection is made based on the type of electronic circuit board, and the second selection is made based on whether or not the type information, field failure history, and test information of the electronic circuit board can be collected.

3 is a flowchart illustrating a process of selecting an analysis target system according to the present invention. As shown in FIG. 3, the selection of an analysis target system is divided into a review based on importance, a review based on management necessity, and a review based on analysis possibility. Can be.

The review according to importance refers to determining the target system included in the periodic safety assessment (PSR) as the analytical subject of the present invention with reference to the analysis result of the periodic safety review (PSR).

According to the management necessity, it is to examine the necessity of component unit life management by examining whether the equipment improvement of the system will occur due to the improvement of the facility and whether the detailed inspection of the electronic circuit board is performed.

If it is determined that it is impossible to collect the type part information, field failure history information, and test information of the electronic circuit board, it is excluded from the type of system and electronic circuit board through the site review. Say that.

[Table 1] shows the analysis target system selected as the primary according to an embodiment of the present invention, as shown in the analysis target system of the electronic circuit board of the nuclear power plant selected as the primary RCS (control rod control), 7300 PROCESS (Process Control), NIS (Nuclear Measurement), DRMS (Radiation Monitoring), SSPS (Atomic Protection), SSILS (Semiconductor Logic Circuit Box), GOVERNOR (Governor Control), FC (Main Water Pump Turbine), SEISMIC (Earthquake) 10 systems of RCP VIBRATION (reactor coolant pump vibration monitoring) were implemented first. The result of the first selection can be changed through the second selection process depending on whether it can be analyzed later.

System to be reviewed PSR
Target system Stop power generation
relation Precision inspection
Performance system Equipment improvement
Whether system
selection Board type
(prediction) RCS Control rod control DRPI Digital control rod
Location DMIMS Furnace Metal Fragment
detection ALMS Acoustic leakage detection 7300
SERIES Process control BOP, FISHER NIS Nuclear instrumentation DRMS Radiation Monitoring (960 **-200) GFFD Nuclear Fuel Damage Detection SSPS Reactor protection SSILS Semiconductor logic circuit GOVERNOR Governor control FC Main water pump turbine CQ Turbine Monitoring ANNUNCIATOR Warning Turbine Generator Process Control AIR COMPRESSOR Air compressor SEISMIC Earthquake monitoring RCP VIBRATION Reactor coolant
Pump vibration monitoring BCMS Boron concentration measurement
system DFMS Measurement of neutron distribution in furnace Main water pump and
Turbine Vibration Monitoring EOSP Electric Turbine
Overspeed protection Stator cooling water Generator hydrogen temperature monitoring Low pressure turbine exhaust temperature monitoring MSR Drainage Tank Water Level

Creating a list by identifying the types of electronic circuit boards in each system is a final step in determining the analysis target and is a standard for securing a parts list.

The identification of the types of substrates to be analyzed can be determined through data on the status of electronic circuit boards (list of supplies and spare parts), facility manuals, and performance records of electronic circuit board precision inspection services (PIMS).

Table 2 illustrates the types of electronic circuit boards for analysis systems according to one embodiment of the present invention. The type of electronic circuit board shown in [Table 2] is the result of primary investigation.

Here, the boards which are less important in the functional aspect of the electronic circuit board or are rarely used in the field, the boards having no parts list, and the boards having a long design life and a low frequency of failure are excluded. Can be.

In addition, when the electronic circuit board being used in the 7300 process system is improved or when there is a need to be distinguished, such as performing the same function but having a different number of signals, the same type of electronic circuit board may be divided into groups.

turn Analytical System System description Analysis board type producer One 7300 Process control 2 SSILS Semiconductor logic protection 3 SSPS Reactor protection 4 RCS Control rod control 5 DRMS Radiation monitoring 6 NIS Off-site nuclear measurement system

On the other hand, the list of electronic circuit boards may include the number of breath, system, model number, manufacturer, management number, tag number, unique number, installation date, the number of electronic circuit boards, electronic circuit board grade and unit price.

The component information preparing unit 120 creates component information of the selected electronic circuit board.

Here, the component information preparing unit 120 may collect the parts list used in the target system manual data and the electronic circuit board precision inspection service (PIMS) and organize the parts names and quantities of components of each type of electronic circuit board. .

The investigation and analysis unit 130 investigates and analyzes the on-site failure history of the selected electronic circuit board.

At this time, the site failure history includes information such as failure rate, design life, failure type, failure history, action type, action history, failure date, maintenance history, maintenance date, maintenance performer and major aging parts.

In addition, the maintenance history includes information such as breath number, system name, board name, serial number, part location, part name, part number, test method, replacement reason and replacement date.

[Table 3] shows the results of analyzing the maintenance history of the electronic circuit board precision inspection service (PIMS) according to an embodiment of the present invention, the system of the analysis results of the first 5300, 7300 process, NIS, RCS, SSILS and SSPS are included.

System name Reason for replacement Sum 7300 processes NIS RCS SSILS SSPS

The calculation unit 140 calculates the type failure rate and design life of the selected electronic circuit board.

In this case, the calculation unit 140 may calculate the failure rate and the design life of the electronic circuit board by using the applicable standard of MIL-HDBK-217F and Telcordia-SR-332.

In general, the failure rate is expressed in units of one million hours (10 ⁶ ) or one billion hours (10 ⁹ ), and can be expressed as the inverse of the mean life time failure (MTBF). For example, a failure rate of 2.0 (10 ⁶ units) means that two failures occur on average per million hours, with an average lifespan of 500,000 hours.

Since one year is 8,760 hours, about 500,000 hours is about 57 years, which is the average life of the part. Based on this, it was applied to calculate failure rate and design life of electronic circuit board.

The MIL-HDBK-217F was established by the United States Department of Defense (DoD) in 1965 and provides the failure rate (or reliability rating scale) and equations for electrical and electronic components and assemblies.

Table 4 summarizes the PSA and PCM schemes. PSA is mainly applied at the completion of system design, and it requires specific specifications and various parameter settings according to system and component design. In general, PCM is a rough prediction method applied at the early stage of system design and predicts failure rate using only a few factors.

PSA PCM Application Step Detailed design phase Design early stage Information A lot of information (design material) Less information (quality, environment, quantity) Failure rate Parts stress model
Apply detailed design information Apply default values to component stress models

And, PSA can be calculated by the following [Formula 1].

[Equation 1]

Here, λ _b is the basic failure rate, π _Q is the quality factor, π _E is the environmental factor, π _A is the application factor, π _T is the temperature factor, π _n is a repeating factor.

 And, PCM can be calculated by the following [Equation 2].

[Equation 2]

Where λ _EQUIP is the total failure rate of the electronic circuit board (failure / 10 ⁸ hours), λ _g is the intrinsic failure rate of the i th component (failure / 10 ⁸ hours), π _Q is the quality factor of the i th unique part, and N _i is The number of i-th unique components, n, represents the number of unique component categories in the electronic circuit board.

In addition, the failure rate and design life of each component of the electronic circuit board according to MIL-HDBK-217F can be calculated by [Equation 3] by inputting the information of each component using a relaxation program.

[Equation 3]

Here, λ _b is the basic failure rate, π _T is the temperature factor, π _S is the application factor π _Q is the quality factor, π _E is the environmental factor.

On the other hand, Telcordia-SR-332 is a standard document describing the reliability prediction procedure and method for electronic equipment. The failure rate and design life of the electronic circuit board are calculated by Equation 4 below.

[Equation 4]

Where λ _ss is the failure rate to which the field history is applied, t is the total operating time of components and systems, f is the total failure count during time t, and V is the adjustment value.

The maintenance policy information estimator 150 estimates the maintenance policy information according to the type design life of the electronic circuit board.

Here, maintenance policy information includes maintenance cycle, replacement cycle, confidence interval estimation, cost-period calculation, field failure history-based statistics, remaining life by predictive model, remaining life by parts replacement, frequency and failure plan of electronic circuit board. It includes information on the number of preventive maintenance, etc., and may also include the type of cause of failure and maintenance advice of the electronic circuit board.

Specifically, the maintenance policy information estimating unit 150 estimates the number of failures as shown in [Equation 5].

[Equation 5]

Failures = Maintenance History Card Failures + Past Repair History Failures + TR Issuance History + Failures (ERP) + PIMS (Performance Degradation)

를 k(=degrees_freedom)개의 독립적이고 표준정규분포를 따르는 확률변수라고 할 때,

로 정의하는 확률변수 Q의 분포를 자유도가 k인 카이제곱 분포로 정의한다. 이에 대한 표기는

로 나타낸다.Also,

Is a random variable that follows k (= degrees_freedom) independent, standard normal distributions,

The distribution of the random variable Q defined by is defined as the chi-square distribution with k degrees of freedom. The notation for this is

Respectively.

In addition, the probability density function of the chi-square distribution is given by Equation 6 below.

[Equation 6]

Where Γ (k / 2) is the gamma function.

The cumulative distribution function is shown in Equation 7 below.

[Equation 7]

When the inverse of the chi-square distribution is called XINV,

95% Reliability =

이며, 50% Reliability =

Lt;

Confidence estimation section EF = (95% confidence) / (50% confidence)

MEAN =

e is 2.71828182845904

이다. Confidence Estimation Section MTBF (Years) =

to be.

As described above, the maintenance policy information estimating unit 150 estimates the maintenance cycle and the replacement cycle based on Equation 8 based on the estimated information.

[Equation 8]

Maintenance cycle =

Replacement cycle =

Here, as an example, 960 hours (construction period 40 days), 730 hours (application time / month), 18 months (fuel replacement cycle) is shown.

Table 5 shows the maintenance policy standards for periodic electronic circuit boards recommended to prevent replacement and failure of electronic circuit boards according to an embodiment of the present invention.

Electronic circuit boards identified as essential for the operation of a power plant are included in the preventive maintenance target, and safety circuit-related electronic circuit boards are included in the preventive maintenance target. Most preventive maintenance policies for electronic circuit boards require refurbishment of the electronic circuit board after the operating period of user decision.

The operation period of this user decision can be selected by the user based on criteria for plant safety, operating environment, field failure history, operation experience and importance of electronic circuit board. In general, if more than half of the expected replacement costs are used for repairs, it is advisable to establish a maintenance policy towards replacing the boards.

The database constructed by the above method can be effectively used to derive replacement standards, maintenance standards, and replacement parts by model through life analysis of safety-related electronic circuit boards of nuclear power plants. That is, the optimum maintenance standards can be set by properly reflecting the on-site failure history and maintenance status of the electronic circuit board.

The integrated management database construction method for an electronic circuit board according to the present invention will be described with reference to FIG. 4 as follows.

4 is a flowchart illustrating a method for constructing an integrated management database of an electronic circuit board according to the present invention. As shown in the drawing, the list generator 110 selects an analysis target system of a nuclear power plant, While creating a list (S110), the component information creation unit 120 creates the component information of the selected electronic circuit board (S120).

In addition, the survey and analysis unit 130 investigates and analyzes the on-site failure history of the type of the selected electronic circuit board (S130), and the calculating unit 140 calculates the type of failure rate and the design life of the selected electronic circuit board ( S140).

The maintenance policy information estimator 150 estimates maintenance policy information according to the type design life of the electronic circuit board (S150).

Hereinafter, the above-described system and the electronic circuit board management system generated through the method will be described with reference to FIG. 5.

FIG. 5 is a schematic diagram illustrating an electronic circuit board management system 200 according to the present invention. As shown in FIG. 5, the database unit 210, the failure rate and design life calculation unit 220, and the maintenance policy regularization unit ( 230 and the maintenance request unit 240 is made.

The database unit 210 stores information generated through the integrated management database construction system 100 of the electronic circuit board described above. Specifically, it includes the type component information of the electronic circuit board, the survey analysis information on the field failure history, the failure rate and design life calculation information, and the maintenance policy information estimated according to the design life.

The failure rate and design life calculation unit 220 manages and analyzes the information stored in the database unit 210 to calculate the failure rate and design life based on the maintenance history of the electronic circuit board and the parts.

Here, the failure rate and design life calculation unit 220 may use the MIL-HDBK-217F and Telcordia-SR-332 modules used in the integrated management database construction system of the electronic circuit board.

In addition, the failure rate and design life calculation unit 220 calculates an expected life and replacement cycle of the electronic circuit board and components, and stores the calculated information in the database unit 210.

The data calculated in this way is the basis for calculating the expected life expectancy and various reliability indicators through the data analysis work defined in the preventive maintenance model, and these expected life and reliability indicators are based on the reliability-based maintenance of general maintenance tasks. The maintenance intervals calculated by the statistics provide the basis for preventing over- or under-employment of manpower.

The maintenance policy regularizing unit 230 regulates the construction and maintenance policy of the standardized fault code based on the maintenance history information and the design life.

Here, the maintenance policy can regulate the appropriate maintenance policy based on the contents and design life described in [Table 5]. In this case, if a failure occurs after the design life of the electronic circuit board, it may be regularized to replace the electronic circuit board itself rather than replace the parts of the electronic circuit board.

The maintenance requester 240 transmits maintenance instructions or request information for the electronic circuit board to the user terminal 10 according to a regular maintenance policy.

In addition, the maintenance request unit 240 may receive the maintenance history according to the maintenance instruction or request information from the user terminal 10, update and store in the database unit 210.

Figure 6 is an exemplary view showing a basic screen of the management system of the electronic circuit board according to the present invention, specifically, the base screen of the aged deterioration management system, as shown, maintenance criteria management for each electronic circuit board, field installation information Management, board basic information management, ICT performance information management, failure and maintenance history management, preventive maintenance history management, and warehouse information management. 7 is an exemplary view showing a maintenance standard management screen for each board.

The present invention can be embodied as computer readable codes on a computer readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, hard disk, optical data storage, and the like, which are implemented in the form of a carrier wave such as transmission over the Internet. It also includes. The computer readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be appreciated by those skilled in the art that numerous changes and modifications may be made without departing from the invention. Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

100: integrated management database construction system of electronic circuit board
110: list creation unit 120: parts information creation unit
130: investigation and analysis unit 140: calculation unit
150: maintenance policy information estimation unit
200: electronic circuit board management system
210: database unit 220: failure rate and design life calculation unit
230: maintenance policy regularization unit 240: maintenance request unit
10: User terminal

Claims (13)

In the integrated management database construction system of the electronic circuit board,
A list preparation unit 110 for selecting an analysis target system of the nuclear power generation facility and creating a list of electronic circuit boards for each system;
A part information creation unit 120 for creating part information of the electronic circuit board selected through the list creation unit 110;
An investigation and analysis unit 130 for investigating and analyzing a field failure history of the electronic circuit board selected through the list creation unit 110;
A calculation unit 140 for calculating a failure rate and a design life of the electronic circuit board selected through the list creation unit 110; And
A maintenance policy information estimator 150 for estimating maintenance policy information according to the design life of the electronic circuit board calculated through the calculator 140; , ≪ / RTI &
The calculator 140,
Equation 4 below to calculate the failure rate of the electronic circuit board, the integrated management database construction system of the electronic circuit board, characterized in that the design life is calculated by dividing the calculated failure rate in billion hours, the unit of the failure rate .
[Equation 4]

Where λ _ss is the failure rate with field history, t is the total operating time of the part and system, f is the total failure count during time t, and V is the adjustment value.
The method of claim 1,
The list creation unit 110,
The system to be analyzed is first selected based on the periodic safety assessment (PSR) status, power generation stop status, electronic circuit board precision inspection service (PIMS) plan / current preventive maintenance, and facility improvement. The integrated management database construction system of the electronic circuit board, characterized in that the secondary selection on the basis of the type of parts information, field failure history information and test information can be collected.
The method of claim 1,
The list of the electronic circuit board,
Of the electronic circuit board, comprising at least one of information, such as a unit, a system, a model number, a manufacturer, a control number, a tag number, a unique number, an installation date, an electronic circuit board quantity, and an electronic circuit board rating and unit price. Integrated management database building system.
The method of claim 1,
The part information creating unit 120,
The parts information used in the manual system of the target system and the electronic circuit board precision inspection service (PIMS) is collected, and the parts information is prepared based on the part names and quantities of the component parts of the electronic circuit board. Integrated management database building system.
The method of claim 1,
The field failure history is
Establishing integrated management database of electronic circuit board, characterized in that it includes at least one information among fault type, fault history, action type, action history, fault date, maintenance history, maintenance date, maintenance performer and major aging parts system.
The method of claim 5, wherein
The maintenance history is,
Integrated management database construction system of the electronic circuit board, characterized in that it contains at least one of information, such as breath number, system name, board name, serial number, part location, part name, part number, test method, reason for replacement and replacement date .
delete delete The method of claim 1,
The maintenance policy information,
Cause of failure and maintenance recommendation of electronic circuit board, maintenance cycle, replacement cycle, confidence interval estimation, calculation of cost / period, statistics based on field failure history, remaining life by predictive model, remaining life by parts replacement, frequency of failure and An integrated management database construction system for an electronic circuit board, characterized in that it includes at least one or more information of the number of planned preventive maintenance.
delete delete delete delete

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