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1,525 results on '"Hecht, H"'

151. Trends in software reliability for digital flight control

Author

Hecht, H and Hecht, M

Subjects
Computer Programming And Software
Abstract

Software error data of major recent Digital Flight Control Systems Development Programs. The report summarizes the data, compare these data with similar data from previous surveys and identifies trends and disciplines to improve software reliability.

Published
1983

152. Fault tolerant software modules for SIFT

Author

Hecht, M and Hecht, H

Subjects
Computer Programming And Software
Abstract

The implementation of software fault tolerance is investigated for critical modules of the Software Implemented Fault Tolerance (SIFT) operating system to support the computational and reliability requirements of advanced fly by wire transport aircraft. Fault tolerant designs generated for the error reported and global executive are examined. A description of the alternate routines, implementation requirements, and software validation are included.

Published
1982

153. Analysis of DSN software anomalies

Author

Galorath, D. D, Hecht, H, Hecht, M, and Reifer, D. J

Subjects
Energy Production And Conversion
Abstract

A categorized data base of software errors which were discovered during the various stages of development and operational use of the Deep Space Network DSN/Mark 3 System was developed. A study team identified several existing error classification schemes (taxonomies), prepared a detailed annotated bibliography of the error taxonomy literature, and produced a new classification scheme which was tuned to the DSN anomaly reporting system and encapsulated the work of others. Based upon the DSN/RCI error taxonomy, error data on approximately 1000 reported DSN/Mark 3 anomalies were analyzed, interpreted and classified. Next, error data are summarized and histograms were produced highlighting key tendencies.

Published
1981

154. Fault-tolerant software

Author

Hecht, H

Subjects
Computer Programming And Software
Abstract

Limitations in the current capabilities for verifying programs by formal proof or by exhaustive testing have led to the investigation of fault-tolerance techniques for applications where the consequence of failure is particularly severe. Two current approaches, N-version programming and the recovery block, are described. A critical feature in the latter is the acceptance test, and a number of useful techniques for constructing these are presented. A system reliability model for the recovery block is introduced, and conclusions derived from this model that affect the design of fault-tolerant software are discussed.

Published
1979

155. Reliability measurement during software development

Author

Hecht, H, Sturm, W. A, and Trattner, S

Subjects
Quality Assurance And Reliability
Abstract

During the development of data base software for a multi-sensor tracking system, reliability was measured. The failure ratio and failure rate were found to be consistent measures. Trend lines were established from these measurements that provided good visualization of the progress on the job as a whole as well as on individual modules. Over one-half of the observed failures were due to factors associated with the individual run submission rather than with the code proper. Possible application of these findings for line management, project managers, functional management, and regulatory agencies is discussed. Steps for simplifying the measurement process and for use of these data in predicting operational software reliability are outlined.

Published
1977

156. Measurement, estimation, and prediction of software reliability

Author

Hecht, H

Subjects
Computer Programming And Software
Abstract

Quantitative indices of software reliability are defined, and application of three important indices is indicated: (1) reliability measurement, (2) reliability estimation, and (3) reliability prediction. State of the art techniques for each of these procedures are presented together with considerations of data acquisition. Failure classifications and other documentation for comprehensive software reliability evaluation are described.

Published
1977

160. Freiburger Arbeitsunfallstudie (FAUST)

Author

Südkamp, N. P., primary, Angenendt, J., additional, Hecht, H., additional, Nowotny-Behrens, U., additional, Köstler, W., additional, Niemeyer, P., additional, Stark, B., additional, and Berger, M., additional

Published
2006
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161. Freiburger Arbeitsunfallstudie (FAUST)

Author

Angenendt, J., primary, Hecht, H., additional, Nowotny-Behrens, U., additional, Köstler, W., additional, Südkamp, N., additional, Stark, B., additional, and Berger, M., additional

Published
2006
Full Text
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