Evidence maintenance supports two styles of evidence changes: evidence
corrections and changes in circumstance.
- Evidence Correction
- An evidence correction is the replacement of an existing evidence
record with a new evidence record in order to correct an incorrect
piece of data. For example, a person may input their date of birth as
part of a submitting an application online. When the caseworker
interviews the client and verifies the date of birth, they find that
the customer made a mistake on original entry of that information. The
caseworker corrects the date of birth evidence by overwriting the
existing date of birth with the correct one. All corrections made to
evidence can be viewed for historical purposes. Caseworkers will be
able to see when the change was made, who changed it and what the
original value was.
- Change in Circumstance
- A change in circumstance is when data in an evidence record
changes over time due to changes in circumstance. For example,
evidence which captures a weekly income amount for a person may vary
over time. When the income amount goes up or down, the caseworker can
record when the income changed took effect.
This evidence pattern supports a succession of changes in circumstance
to the same evidence object. For example, the set of changes to the income
amount, each in succession of each other, collectively represent the
changes to the income amount evidence object.