Constraint Generation in the Presence of Bad Data

Posted on Thu 21 September 2017 in TDDA • Tagged with tdda, constraints, discovery, verification, suggestion, cartoon, bad data

Bad data is widespread and pervasive.1

Only datasets and analytical processes that have been subject to rigorous and sustained quality assurance processes are typically capable of achieving low or zero error rates. "Badness" can take many forms and have various aspects, including incorrect values, missing values, duplicated entries, misencoded …

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Lessons Learned: Bad Data and other SNAFUs

Posted on Mon 15 February 2016 in TDDA • Tagged with tdda, bad data

My first paid programming job was working for my local education authority during the summer. The Advisory Unit for Computer-Based Education (AUCBE), run by a fantastic visionary and literal "greybeard" called Bill Tagg, produced software for schools in Hertfordshire and environs, and one of their products was a simple database …

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