Posted on Tue 12 December 2017 in TDDA • Tagged with data lineage, data provenance, data governance, tdda, constraints, miro
Our previous post introduced the idea of data provenance (a.k.a. data lineage), which has been discussed on a couple of podcasts recently. This is an issue that is close to our hearts at Stochastic Solutions. Here, we'll talk about how we handle this issue, both methodologically and in …
Continue readingPosted on Thu 30 November 2017 in TDDA • Tagged with data lineage, data provenance, data governance, tdda, constraints
In Episode 49 of the Not So Standard Deviations podcast, the final segment (starting at 59:32) discusses data lineage, after Roger Peng listened to the September 3rd (2017) episode of another podcast, Linear Digressions, which discussed that subject.
This is a topic very close to our hearts, and I …
Continue readingPosted on Fri 06 October 2017 in TDDA • Tagged with tdda, constraints, verification, bad data
We have a new White Paper available:
Abstract
Correctness is a key problem at every stage of data science projects: completing an entire analysis without a serious error at some stage is surprisingly hard. Even errors that reverse or completely invalidate the analysis can be …
Continue readingPosted 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 …
Continue readingPosted on Thu 26 January 2017 in TDDA • Tagged with tdda, constraints, rexpy
Since the last post, we have extended the reference test functionality
in the Python tdda library.
Major changes (as of version 0.2.5, at the time of writing) include:
ReferenceTest class that has significantly
more functionality from the previous (now deprecated)
WritableTestCase.pytest …