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Comparing Negative Binomial and Recursive Partitioning Models for Fault Prediction Elaine Weyuker Thomas Ostrand Robert Bell AT&T Labs - Research
High Level Goal To determine which files of a large  industrial software system with multiple  releases are particularly likely to be fault-prone.
Why is this Important? ,[object Object],[object Object],[object Object]
APPROACH ,[object Object]
Past Systems Studied 75% 2.25 years Voice Resp 83% 2 years Provisioning 83% 4 years Inventory 20% Files Period Covered System Type
Can We Do Better? ,[object Object]
Recursive Partitioning System A, Releases 1-26,  cp  = 0.01
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Percent Faults in 20% Files 67.9% 76.1% System C 84.8% 93.4% System B 76.1% 80.5% System A RP NBR

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