Data quality database model -

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need example of database model attached database data quality. best form of answer @ least ddl that's executable in mysql; other rdms ddl's okay, i'll post question asking porting of code.

a explaintion huge plus.

questions, comments, feedback, etc. -- comment, thanks!!

the biggest problem identifying meaningful measures of quality. that's highly application-dependent, doubt able much. (at least not without lot more information--perhaps more you're allowed give.)

but let's application records observations of birds individuals. (i'm throwing off top of head. read gist, , expect details crumble under scrutiny.) under average field conditions,

  • some species hard beginner wrong
  • some species hard expert right
  • a specific individual's ability varies irregularly on time (good days, bad days)
  • individuals become more skilled on time
  • you might highly skilled @ identifying hawks, , totally suck @ identifying gulls
  • individuals prone suggestion (who they're makes difference in reliability)

so, take shot @ assessing quality of identification, might try record lot of information besides observation "3 red-tailed hawks @ cape may on 05-feb-2011 @ 4:30 pm". might try record

  • weather
  • lighting
  • temperature (some birders suck in cold)
  • hours afield (some birders suck after 3 hours, or after 20 cold minutes)
  • names of others present
  • average difficulty of correctly identifying red-tailed hawks
  • probability individual correctly identify red-tails under these field conditions
  • alcohol intake

although might "meta" field birders, database designer it's data. , you'd design tables you'd design them other application. (that's did, anyway.)


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