- Email: [email protected]
“Reliability” engineering
264
ABSTRACTSON ELECTRONICS RELIABILITYAND MICROMINIATURIZATION
Reliability and confidence criteria in structural design. H. SERBIN,Aerospace Engng., 21, 37-40 (1962). Concepts of reliability as dependent on sample size are reviewed in their application to structural design. The use of the confidence level as a qualification attached to the measure of reliability is examined. An alternate formulation of reliability is proposed to avoid the double valued description usually associated with confidence levels. Operating characteristic curves for reliability measurement,* A J. BoNI$, IRE Trans. Reliab. Qual. Control, RQC-I1, No. 3 (1962). Seven charts on operating characteristic curves are given which show some of the relations between quality control and reliability. All of these charts cover reliability measurement problems. The emphasis is on usefulness. Some aspects of test equipment reliability. F. A. APPLEGATE, IRE lnt. Convention Record, 10, Pt. 6, 255 (1962). Highly complex electronic systems have resulted in increased use of automatic test equipment. The reliability of such equipment is shown to depend upon both the desired availability and the desired reliability during check-out periods. The test equipment reliability requirement is actually a trade-off between the two. "Reliability" engineering. G. A. W. BOEHM, Fortune, 67, 124-127, 181, 182, 184, 186 (1963). A review paper on reliability engineering, which describes some of the basic concepts involved, discusses applications to management problems and forecasts future developments. AGREE-able e x p e r i e n c e . P. J. GOLDIN, Environmental Quarterly, p. 24 (1963). In the U.S.A., the requirement for pre-shipment reliability proof-testing, originally found in only a few, isolated contracts, is now included in a large percentage of orders for electronic equipment. This report describes changes in quality control, reliability techniques and related areas stemming from the AGREE programme at R.C.A.
Reliability through controlled environments and microminiaturization*. G. W. A. DUMMER, Electron. Reliab. Micromin. l, 189 (1962). Failure rate data is quoted on various electronic equipments. The philosophy of improved reliability through controlled environments is put forward and a system of liquid cooling described, figures being given on failure rates on similar equipments with and without liquid cooling. The reasons for improved reliability through microminiaturization and a description of thin film and integrated or solid circuit microminaturization are given. The hybrid concept of microminiaturization is described and the importance of redundancy is emphasized. Effectivity: its application to a long-lived space system. K. S. PACKARDand M. H. GOLDSTEIN, Trans. LE.E.E., R-12, No. I, p. 23, 1963. This paper proposes a measure of equipment dependability (reliability) that is related to statistical loss and is suitable for application to complex systems. The relation of this concept, termed effectivity, to other measures is explained and its use is illustrated by application to a specific space system. A prediction of effectivity is described and demonstrated using analytical means and also by applying a novel Monte-Carlo procedure. The results of testing are also presented and compared with the predicted values. Reliability of aerospace electrical equipment--how much does it cost? J. A. JENNINGS,JR., Trans. I.E.E.E., AS-l, No. 1, p. 38, (1963.) There have been numerous changes in component characteristics during the last five years. These changes have created many problems for both the designer and the user. The efforts of management, both private industry and government, to focus attention on these problems have created a new discipline, Reliability. This paper will demonstrate that it is within the capability of every organization, large or small, to have a good reliability organization at a reasonable cost. Use of failure statistics in design. W. B. BisHoP, Electro-Technology, July 1963, p. 97. By specifying proability of failure of a part during the wearout-failure period, the designer may be able to make equipment both more reliable and more economical. The author advocates use of the failure-module concept of periodic replacement, based on specification of wearout failure. A generalized expression of the probability-density function of parts is developed. *Based on Electrical EngineeringAbstracts by kind permission of The Institution of Electrical Engineers.
ABSTRACTSON ELECTRONICS RELIABILITYAND MICROMINIATURIZATION
Reliability and confidence criteria in structural design. H. SERBIN,Aerospace Engng., 21, 37-40 (1962). Concepts of reliability as dependent on sample size are reviewed in their application to structural design. The use of the confidence level as a qualification attached to the measure of reliability is examined. An alternate formulation of reliability is proposed to avoid the double valued description usually associated with confidence levels. Operating characteristic curves for reliability measurement,* A J. BoNI$, IRE Trans. Reliab. Qual. Control, RQC-I1, No. 3 (1962). Seven charts on operating characteristic curves are given which show some of the relations between quality control and reliability. All of these charts cover reliability measurement problems. The emphasis is on usefulness. Some aspects of test equipment reliability. F. A. APPLEGATE, IRE lnt. Convention Record, 10, Pt. 6, 255 (1962). Highly complex electronic systems have resulted in increased use of automatic test equipment. The reliability of such equipment is shown to depend upon both the desired availability and the desired reliability during check-out periods. The test equipment reliability requirement is actually a trade-off between the two. "Reliability" engineering. G. A. W. BOEHM, Fortune, 67, 124-127, 181, 182, 184, 186 (1963). A review paper on reliability engineering, which describes some of the basic concepts involved, discusses applications to management problems and forecasts future developments. AGREE-able e x p e r i e n c e . P. J. GOLDIN, Environmental Quarterly, p. 24 (1963). In the U.S.A., the requirement for pre-shipment reliability proof-testing, originally found in only a few, isolated contracts, is now included in a large percentage of orders for electronic equipment. This report describes changes in quality control, reliability techniques and related areas stemming from the AGREE programme at R.C.A.
Reliability through controlled environments and microminiaturization*. G. W. A. DUMMER, Electron. Reliab. Micromin. l, 189 (1962). Failure rate data is quoted on various electronic equipments. The philosophy of improved reliability through controlled environments is put forward and a system of liquid cooling described, figures being given on failure rates on similar equipments with and without liquid cooling. The reasons for improved reliability through microminiaturization and a description of thin film and integrated or solid circuit microminaturization are given. The hybrid concept of microminiaturization is described and the importance of redundancy is emphasized. Effectivity: its application to a long-lived space system. K. S. PACKARDand M. H. GOLDSTEIN, Trans. LE.E.E., R-12, No. I, p. 23, 1963. This paper proposes a measure of equipment dependability (reliability) that is related to statistical loss and is suitable for application to complex systems. The relation of this concept, termed effectivity, to other measures is explained and its use is illustrated by application to a specific space system. A prediction of effectivity is described and demonstrated using analytical means and also by applying a novel Monte-Carlo procedure. The results of testing are also presented and compared with the predicted values. Reliability of aerospace electrical equipment--how much does it cost? J. A. JENNINGS,JR., Trans. I.E.E.E., AS-l, No. 1, p. 38, (1963.) There have been numerous changes in component characteristics during the last five years. These changes have created many problems for both the designer and the user. The efforts of management, both private industry and government, to focus attention on these problems have created a new discipline, Reliability. This paper will demonstrate that it is within the capability of every organization, large or small, to have a good reliability organization at a reasonable cost. Use of failure statistics in design. W. B. BisHoP, Electro-Technology, July 1963, p. 97. By specifying proability of failure of a part during the wearout-failure period, the designer may be able to make equipment both more reliable and more economical. The author advocates use of the failure-module concept of periodic replacement, based on specification of wearout failure. A generalized expression of the probability-density function of parts is developed. *Based on Electrical EngineeringAbstracts by kind permission of The Institution of Electrical Engineers.