GB 5081-1985 Guide for the collection of reliability, effectiveness and maintainability data for electronic products in the field
Some standard content:
UDC 621,3-192.004.5:519.2
CNS 4754-1982
National Standard of the People's Republic of China
GB5081--85
IEC362--71
Guide for the collection
of reliability, availability and maintainability data from field performance of electronic itemsPublished on April 17, 1985
Implemented on January 1, 1986
Approved by the State Bureau of Standards
1 Scope
National Standard of the People's Republic of China
Guide for the collection
of reliability, availability and maintainability data from field performance of electronic items coflection
of reliability, availability and maintainability data from field performance of electronic items UDC 621.3-192
-004.5:519.2
GB5081-85
IEC 362-71
This standard provides guidance for the collection of field performance reliability data of electronic products, so that sufficient and extensive data can be obtained to make detailed failure and failure rate analysis of products working under various conditions (time, environment, storage, repair, etc.). It should be emphasized that valuable reliability data is not only data on failures, but also must include data on success (non-failure). In other words, this standard is not limited to guidance on failure reporting. This standard also considers the collection of data on availability and maintainability. In all cases, it is important to distinguish failed products from products that have been replaced by mistake in data collection. This standard is fully equivalent to the international standard IEC362 "Guidelines for the Collection of Field Performance Reliability, Availability and Maintainability Data of Electronic Products".
2 Purpose of data collection
The purpose of collecting data on the reliability of electronic products on site is: to provide data for investigating the actual reliability level, so that the expected reliability characteristics of the product can be compared with the field data, thereby improving future predictions:
b. To provide data for improving the reliability of existing and future products; c. To provide data for the organization and management of maintenance work (maintenance, repair, maintenance personnel deployment, spare parts reserves, etc.). 3 Data to be collected
In view of the above, it is necessary to systematically collect data on the following aspects: observation of the whole;
working conditions:
c. product failure;
maintenance work.
This standard provides guidelines for the development of data collection programs. The developed programs should be consistent with the contents of Chapters 2 and 3 above, and can be applied both in the investigation stage of equipment prototypes and by large maintenance organizations in a wider range of situations. If the above guidelines are followed, the accuracy and completeness of the report will be improved due to the collection of standardized information. In addition, this standardization will promote the exchange of information between users and manufacturers. Note: The best results will be achieved if the collection, analysis and use of results are closely coordinated. The National Bureau of Standards issued on April 17, 1985
1986-01-01
5 Report
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The appendix gives specific suggestions on the content of the use, field failure and maintenance reports for individual products and the entire group. It should be pointed out that the relevant content of the use and failure reports will vary significantly depending on the report, observation product and working method of the individual product. For example, the use and failure reports for large devices in fixed locations can be combined into one report, while for small equipment set up in a central workplace, simple failure reports can be submitted by maintenance technicians, and the use report is submitted by the department in charge of the operation of the equipment.
Note: The information required in the appendix is intended to provide data by which the reliability of products operating under specific field conditions can be evaluated and compared with the expected reliability of such products operating under the same or similar conditions, or, if the products in the case summary are operated under slightly different conditions, the results can provide valuable information on the suitability of the products or the measures required to improve their suitability. Sufficiently detailed reports can make reliability estimates not only for the components but also for the equipment in which they are contained. Of course, the population considered in the report must be consistent in terms of the construction and operating conditions of the products that make up the population, and failures must be reported in the form recommended in Appendix A, consistent in time with the "use" history of the product population (because the failure rate is determined relative to a given time period), so that the failure report and the use report should not involve the same population and should also be consistent in time. Accurate data related to the product history are basic values.
5.1 Use Report
The data reported should be derived from the use information of the product. Where more than one system is in operation, aggregate data shall be used for each product population (the whole of similar products observed). 5.2 Failure Reports
The failure report shall include all observed failures and shall also contain sufficient information to identify misuse failures. Failures considered to be caused by any maintenance action shall be noted. The Annex covers the requirements for detailed studies of individual failures sufficiently extensively. In special cases, where it is difficult to collect all the required failure data due to economic or lack of information resources, a short form report may be agreed to collect limited data on all relevant failures.
The Annex does not provide a specific format for the failure report. For equipment, an important part of the data, such as general operating conditions, can be found in other documents, especially in the usage report. 5.3 Maintenance Reports
Maintenance is mainly aimed at preventing or completely eliminating failures. Therefore, in this sense, the maintenance report is neither a failure report nor a usage report. However, since its data is essentially the same as required by 5.1 and 5.2 above, the information is included in the same data system. If no replacement or repair is made, the maintenance report may be classified as an "in-use" report. If replacement or repair is made, the maintenance report may be considered a "failure" report even if the product fails in actual operation. These differences are noticeable when the field work report is completed accurately. 2
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Appendix A
Field work report
(Supplement)
The letters "I" and "P" in brackets refer to "individual" and "general" reports respectively, and the numbers in brackets refer to the chapter or clause number of this standard or the note number in this appendix.
A.1 Number and date of report (I, P) bzxZ.net
A.2 Name and address of user, location of product (1) A.3
Nature of report
"In-use" report (see 5.1):
"Failure" report (see 5.2);
"Maintenance" report (see 5.3).
Product identification (1I, P, Note ①)
Product quantity (P, Note ②)
Product history (Note ③)
Date of manufacture or modification (I)
Condition after manufacture or modification (the nature and date that may change the product's feasibility) (1I, P), Note: Emphasize the possible impact of the modification on the failures noted in this report. c.
First date of commissioning (I, Note ④), cumulative working time (or number of cycles) since this date (I, P); date of commissioning after the most recent modification (referring to the modification of A.6b) (1I, Note ④): most recent date of commissioning (1, Note ④); cumulative working time (or number of cycles) since this date (I, P); storage or transportation conditions before the most recent commissioning and their cumulative time (I, P, Note), nature and date of the most recent maintenance work and its working time (or number of cycles) since this date (I) cumulative non-working time in good condition (I, P), cumulative non-operation time in non-good condition (I, P) cumulative time in standby state (I, P). 1.
A.7-General working conditions (I, P)
Installation form
Degree of mobility
Fixed;
b.Movable;
Portable (only refers to what one person can carry). c.
Establishment nature
a. Ground:
b. Carrying,
c. Vehicle-mounted,
d. Ship-mounted:
e. Aircraft-mounted,
f. Other (special).
A.7.2 Specific environment
a. Indoors, under the shed, outdoors, etc.;
Temperature range (average and limit values);
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Humidity (absolute and/or relative) range (average and limit values); c.
d. Air pressure range (average and limit values);
Atmospheric properties (air conditioning, temperature control, cleanliness monitoring, dust, sand, salt spray, corrosion, etc.); e.
1. Vibration, shock, collision (frequency, amplitude, acceleration, etc.). A.7.3 Working mode
Continuous,
Intermittent (give a cycle);
c. Standby;
d. One-time operation (such as one-time launch equipment); e. Storage.
A.8 Product failure description
Symptoms and signs (I)
Failures detected during operation, periodic inspection, and scheduled maintenance (1) Product failure mode (identification of affected functions) (I, P) Failure cause (I, P, Note ③)
Internal cause of the product;
Failure caused by misuse;
Caused by maintenance work:
External cause of the product (Note ③;
Secondary failure caused by related products;
f,
Unknown,
Unconfirmed during investigation.
A.9 Product failure analysis (Note)
Failed parts list (identification) and circuit information (I) A.9.1
Part failure mode (I, Note ③)
List (identification) and circuit information of the main components that cause product failure (I, P)A.9.3i
A.9.4 If necessary, retain the components for investigation and testing (I)A.10 Treatment measures (I, P)
A,10.1 Diagnose the product and components
Perform repair measures such as replacement, repair, adjustment, modification and lubrication; verify through inspection and testing.
A.10.2 The actual time required for diagnosis, repair, testing, etc.A.10.3 Downtime (including, for example, waiting for components, transportation, etc.)A.10.4 Maintenance level
A.11 Evaluation made by on-site or maintenance technicians (I, P)A.11.1 Additional relevant data (Note ?）
A.11.2 Observations and opinions on the cause of failure (Note) A.12 Title, name and signature of the person writing the report (I, P) A.13 Title, name and signature of the person responsible for the report (I, P) Note: ① The more complete the identification of the product, the less guesswork there is in the analysis and the faster corrections can be made. According to the product and its use, the type, series or mark, serial number and manufacturing unit of the main equipment, components, subassemblies, functional blocks, parts (or components), specifications (as needed), circuit diagrams, block diagrams, product numbers and revision numbers are given. 4
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② When this report is used to report a successful operating cycle or task and maintenance work, more than one product with essentially the same design can be included in the report. The product serial numbers and The manufacturing date must be listed separately, but all other data are applicable to all products. ③ The historical data of the main products or main components of the products should be given. Any product with a record of working history and number of cycles can be regarded as a main product. Each main product should have a history of obtaining the required data and the source of the required data, including factory or equipment transportation records and maintenance and repairs. Such data can also be obtained for small products, components, etc., which will help analysis and correction work. If the product has two or more different output functions, the information of d, g, and h segments related to failure should be given for all output functions.
③ The successive operations corresponding to the operating cycle referred to in A.7.3b should not be reported as "put into use". ? If a failure occurs immediately after a period of transportation, storage or standby, the relevant conditions should be stated. ③ Power overvoltage or fluctuation, overload, interruption, etc., the details of these conditions immediately before the failure are useful information. ? When several parts (or components) fail at the same time, they must be analyzed one by one. ③ Open circuit or short circuit, performance degradation beyond the specified limit, mechanical failure, etc. ③ If possible, the report should be accompanied by drawings, photos and test data sheets. @ When providing observations, the main causes of failure and secondary failure or the cause of a failure and its secondary effects should be given. For example, the relaxation of the spring or poor contact and its effect on the wear or life of any associated products. Additional notes:
This standard was drafted by the Fifth Research Institute of the Ministry of Electronics Industry.The successive runs of the operating cycle referred to in 3b are reported as "put into service". ? If a failure occurs immediately after a period of transportation, storage or standby, the relevant conditions should be stated. ③ Power supply overvoltage or fluctuation, overload, interruption, etc. Details of these conditions immediately before the failure are useful information. ? When several parts (or components) fail at the same time, they must be analyzed one by one. ③ Open circuit or short circuit, performance degradation beyond the specified limits, mechanical failure, etc. ③ If possible, drawings, photos and test data tables should be attached to the report. @ When providing observations, the main causes of failure and secondary failures or the cause of a failure and its secondary effects should be given. For example, the relaxation of the spring or poor contact and its effect on the wear or life of any associated products. Additional notes:
This standard was drafted by the Fifth Research Institute of the Ministry of Electronics Industry.The successive runs of the operating cycle referred to in 3b are reported as "put into service". ? If a failure occurs immediately after a period of transportation, storage or standby, the relevant conditions should be stated. ③ Power supply overvoltage or fluctuation, overload, interruption, etc. Details of these conditions immediately before the failure are useful information. ? When several parts (or components) fail at the same time, they must be analyzed one by one. ③ Open circuit or short circuit, performance degradation beyond the specified limits, mechanical failure, etc. ③ If possible, drawings, photos and test data tables should be attached to the report. @ When providing observations, the main causes of failure and secondary failures or the cause of a failure and its secondary effects should be given. For example, the relaxation of the spring or poor contact and its effect on the wear or life of any associated products. Additional notes:
This standard was drafted by the Fifth Research Institute of the Ministry of Electronics Industry.
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