By Glenford J. Myers
Offers constructively with well-known software program difficulties. specializes in the unreliability of computing device courses and gives state of the art options. Covers—software improvement, software program trying out, dependent programming, composite layout, language layout, proofs of software correctness, and mathematical reliability types. Written in a casual type for somebody whose paintings is laid low with the unreliability of software program. Examples illustrate key principles, over one hundred eighty references
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Additional info for Software reliability: principles and practices
Mechanisms should be used in the tracing tools to obtain the minimal amount of data that captures the required type of information. The issue is more one of introducing intelligence in the process than what we would consider the brute force of enlarging its raw-data-handling capability. In some of the approaches we will now discuss, such intelligence will actually be the responsibility of the analyst, while in others the intelligence to automatically perform the appropriate selection can be integrated in an external driver tool or injected into the tracing tool itself.
Observations provide new data that shouldbe continuously contrasted with models, resulting in an assessment of the understanding of the system behavior or identifying the need to refine the model. Although performance models are the topic of other chapters in this book and elsewhere [20, 21], we raise a couple of issues we think are relevant in this context. The first issue relates to the analysis power of the tool and the necessity to stress the importance of being able to perform precise measurements and check them against models.
The human eye has great correlation capabilities and can often identify a lot of relevant structures in sampled displays. What a tool needs to provide are mechanisms to let the analyst identify and then focus on the regions of interest. The summarization in the display process affects not only the spatial dimension (processes) but also the temporal dimension. If the semantic value of several processes maps to the same pixel, a choice has to be made as to which value to represent. An alternative would be to select one of the possible threads, for example, randomly, the one with smallest thread identifier, etc.
Software reliability: principles and practices by Glenford J. Myers