To regulate or improve something, you first measure it.

The word credible appears in the most recent version of USPAP (©1999) some 276 times.  The Uniform Standards of Professional Appraisal Practice as published from time to time by the Appraisal Foundation.  The word credibility is used an additional 39 times, specifically as a measure of compliance. (Colloquially called a “violation”.)

Let’s look at these words.

‘Violation’ is a binary result.  You are either guilty or not guilty of a USPAP ‘violation’.  On what basis is guilt or non-guilt measured?

Credibility!  Is defined in USPAP as “worthy of belief”.  The key words are worthy, and belief.  So credibility is believability.

And how do we measure believability?  This is the problem.  We must make a decision – guilty/not guilty on the basis of whether I believe or not.  And whose belief is it we seek?  Your belief, or my belief.  Or is there some true absolute believer out there that magically makes the referee call?

Believability itself is subjective, and person-dependent.  On the other hand, USPAP is quite clear:  “Credible assignment results require support by relevant evidence and logic.  …always measured in the context of the intended use.”

Uh oh!  More clear, precise evidence, and logical, words . . . :  relevant; measured; context; intended.

It must be in the standards somewhere.  It can’t be just ‘believe me’!  It can’t.

It must be in the review standards.  Let’s look.  Here are the words we found.  The measure of believability:  “the reviewer is required to develop an opinion as to the completeness, accuracy, adequacy, relevance and reasonableness of the analysis.”  Let’s look at each, and the any possible objective basis.

  • Completeness: Assumes the reviewer is a better judge of all that is necessary.
  • Accuracy: Assumes the reviewer magically knows the true accurate number.
  • Adequacy: Requires an opinion of sufficiency.
  • Relevance: Requires a judgment of what is important to the client, whether disclosed, or not.
  • Reasonableness: Quite a weasel word – don’t be silly or unreasonable.

All this somehow presumes that the reviewer knows better and more than the original appraiser does.

Here’s the rub.  Appraisal is all about numbers – the data collection, selection, adjustment, and delivery.  We have numbers, and ways of establishing risk/reliability of valuations (given complete, or substantially complete data).

Why not measures of reliability?  Why believability?

Why not reproducibility and auditability?  Why subjective review opinion?  Why?

The data has improved.  The analytics are instantaneous.  The brain/machine visualization is there.  The goal is to measure markets, not compare comps.  It is time for reliability, not believability.

It’s time.