Quality assurance errors

Error Categories

Four possible categories of error can be assigned to reviewed cases which have been identified as having a coding inconsistency:

Historical error categories applied to cases closed before August 2013 can be accessed here

 

High Impact

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Pertains to errors in the data fields which are most commonly used when constructing a search of the NCIS (or when classifying identified cases), regardless of the topic of interest.

Such errors are considered high impact as:

  • this may affect a large number of users; or
  • would likely influence the inclusion/ exclusion of relevant cases in search results; or
  • may place a case in an incorrect category within the identified data set when interpreting results

Where graded coding exists, High Impact errors often relate to the highest levels of coding.  The top levels of a hierarchy often describe the broad categories/contexts surrounding death (e.g. drowning, MVA), and are therefore more likely to result in a case being missed if incorrectly coded.

See the list of data fields that correspond to High Impact errors.

 

Moderate Impact

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Pertains to errors in the data fields which are likely to be used when examining a particular group of characteristics (such as age, sex), or a context which surrounds the death (i.e. pedestrian deaths).

Such errors are considered to have moderate impact as they:

  • may affect a smaller nujmber of users; or
  • are less likely to influence the inclusion/ exclusion of relevant cases in search results if the error is found at a low level in the graded hierarchy.

Where graded coding exists, Moderate Impact errors often relate to the lower levels of coding.  The lower levels of a hierarchy often describe the more specific details surrounding death, and are less likely to influence the broad categories/contexts surrounding death (e.g. drowning, MVA)

See the list of data fields that correspond to Moderate Impact errors.

 

Minimal Impact

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Pertains to errors in the data fields, which, whilst providing additional contextual information to the case, are unlikely to influence the broad categories/contexts surrounding death or the inclusion/exclusion of a case in search results.

Also applies to all non-mandatory fields.

See the list of data fields that correspond to Minimal Impact errors.

 

Procedural

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Pertains to errors within the case associated either with the court process of the jurisdiction or to the NCIS data transfer process.

This includes inaccurate reporting of system dates, missing data about forensic/coronial procedures undertaken, and deletion of overcoding.

See the list of data fields that correspond to Procedural errors.