Downloaded from https://www.everyspec.com AMCP 706.196 Accurate recording of failure data is 5.3.2 DATA CONTROL essential to any reliability data system. Failure forms must be provided to test and Careful control must be exercised over operating personnel. When a failure ock:urs, the data recording operations in order to a failure report - which contains a des- assure timely and accurate data reporting.
cription of the failure, hardware identifies- Procedures must be established for (1) col- tion, test conditions at the time of failure, leoting, reproducin& distributing, and filing cause of failure, and hardware disposition -- test and failure forms; (2) handling the re- must be written, If the failure occurred ported data-, (3) methods of monitoring the during test, the test document number must data for compliance with requirements; (4) be referenced on the failure report.
Other preparing the data for conversion into a Item., of Information are added to this re- medium acceptable to data processing; and port by the failure analysis system for pro- (5) providing for corrections to the reported cessing purposes, This additional information data. See Fig. 5-6 for a typical data pro- usually consists of failure classiflcatlon, ceasing system. Since the data being col- classification as to relevancy, fault isolation lected are for a computerized data proces- code (used to identify the failed subcom- sing system, processing instructions must ponent in those eomponents which are be developed and the data inuot be tabu- :
multifunctional), and the simulated mission lated in a format that permits automatic environment that caused the failure to error checking occur, The paragraphs that follow are brief descriptions of the tasks involved for each Problems often arise when data must be of the preceding functions and responsi- reported by field maintenance and logistic bilities. personnel who often are so busy at their own tasks that they do not have the time to record data properly.
It may be neces- 5.3.3 DATA HANDLING sary, in such a case, to assign reliability field personnel to the task of gathering data Test data forms generated in the test and filling out torms, This may be the areas (at all levels of test) should be sent biggest difficulty of all, in getting good field to the dama control area for processing Pnd data. analysis. Failure data forms should be sent to the failure analysis group for review and Different forms should be developed for classification. in-house and field use.
The in-house forms should be used to record defects discovered When blank forms are sent to the test during receiving inspection and acceptance areas, they should contain whatever pre- testing, Additional in-house forms must be printed information - such as hardware developed for use during reliability demon- identification - is feasible, This will re- stration testing. Field forms should be de- duce recording errors *d save time for the signed which facilitate the easy reporting of test personnel. If a mechanized data pro- failures occurring in the field.
cessing system is being used, certain fields of data can be coded for ease of processing A wide variety of forms has been de- and minimizing transcription errors. veloped. Several typical forms are presented in Figs. 5-3 to 5-5; Chapter 9, Ref. 4, shows Procedures for data reporting should be other forms, The data forms should be set written and standardized, These procedures up so that data entry can prpcecd directly. should contain instructions as to when ''p,