Modify score calculations. Ignore any survey item scores of 0.

Never include zero when performing calculations for scores.

doc/architectural_decision_records/9.md

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+# Decision record 9
+
+# Modify score calculations so that a survey item score of 0 is never included in the average
+
+## Status
+
+Completed
+
+## Context
+
+Some scores were artificially low because survey items that lacked survey item responses returned a score of 0.  0 did not represent the average likert_scores of survey item responses, only the lack of responses.  0 was incorrectly being averaged with other survey items and artificially dragging down the score.
+
+## Decision
+
+Survey item scores of 0 should be ignored and filtered out when performing score calculations.
+
+## Consequences
+
+Some average scores have increased.