From Scores to Function: Why OaSIS Is Raising Important Questions for Vocational Evaluation Practice

April 22 2026

Following my session at CAVEWAS Training Day on April 15, one theme stood out more than anything else: the depth of discussion that opened up around OaSIS. The questions were not only about what OaSIS is or how to use it. The discussion went further than that. It reflected a very real tension in the field around what this kind of transition means for vocational evaluation practice, reporting, and defensibility.

Many experienced evaluators spoke about the challenge of moving from familiar occupational classification systems toward a more dynamic, criterion-based model. That shift is not simply technical. It requires evaluators to think carefully about how assessment findings are interpreted, translated, and communicated. One question seemed to sit underneath much of the discussion:

How do we translate assessment findings into functional, occupational conclusions in a way that is clear, defensible, and grounded in function, without over-relying on scores or falling back on shortcuts?

This is where the conversation became especially important. OaSIS may be a tool, but the larger issue is not only about learning the tool itself. It is about the reasoning process behind the conclusions we make as evaluators. In vocational evaluation, assessment results do not speak for themselves. A score, profile, rating, or test result still needs to be interpreted within the context of the individual, the referral question, the occupational demands, the labour market, and the functional implications of the findings. That process requires more than simply matching results to job titles. It requires us to move thoughtfully from:

test findings → measured constructs → functional implications → occupational conclusions

This is where many of the current practice questions appear to be emerging. The discussion did not end with my session. It carried into the panel that followed, where different perspectives highlighted how varied current approaches can be across disciplines and practice settings. That variation is not necessarily surprising. Evaluators may be working from different training backgrounds, referral sources, report formats, assessment tools, and expectations. However, without a more consistent way of reasoning through the relationship between test findings, functional capacity, and occupational outcomes, variability in practice becomes inevitable. This is why I see the current OaSIS discussion as more than a transition from one system to another. It is also exposing a broader methodology gap.

For vocational evaluators, disability management professionals, rehabilitation practitioners, and forensic vocational experts, the challenge is not simply to identify occupations. The challenge is to explain why those occupations are appropriate, realistic, or inconsistent with the person’s demonstrated functional profile. That means our conclusions need to be understandable to the reader, connected to the evidence, and grounded in function. A defensible opinion is not built by relying on a tool alone. It is built through the evaluator’s reasoning process.

OaSIS may help support that process, but it does not replace the professional judgment required to interpret findings, identify relevant occupational implications, and clearly explain the basis for conclusions.

For me, the conversation at CAVEWAS reinforced that the focus moving forward should not only be on learning OaSIS. It should also be on strengthening the methodology underneath our reports.

Because ultimately, defensibility lives in the reasoning, how we connect the findings, and how we explain function. It also lives in whether the reader can clearly follow how we moved from assessment results to occupational conclusions.

As the field continues to adapt, I think this is an important area for ongoing discussion, training, and professional reflection.