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CSE 322: Software Reliability Engineering Topics covered: Techniques for prediction.

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Presentation on theme: "CSE 322: Software Reliability Engineering Topics covered: Techniques for prediction."— Presentation transcript:

1 CSE 322: Software Reliability Engineering Topics covered: Techniques for prediction

2 Introduction and motivation  Objective of a reliability model:  Predicted metrics:

3 Introduction and prediction  Model accuracy:  Issues specific to software:

4 Introduction and motivation  Short term vs. long term prediction:  Optimistic vs. pessimistic prediction:  Bias in model prediction:  Need to assess the accuracy of model predictions.

5 Predictive accuracy  How to assess predictive accuracy?

6 Predictive accuracy  Variability measure:

7 Predictive accuracy  Braun statistic:

8 Predictive accuracy  Compare the accuracy of the predictions obtained using a set of models.

9 Predictive accuracy  Model comparison

10 Predictive accuracy  Prequential Likelihood Ratio (PLR)

11 Predictive accuracy  Prequential Likelihood Ratio (PLR) of a set of models

12 Predictive accuracy  Asymptotic PLR


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