I'd go with a separate table with the columns ObjectiveId (as a foreign key reference to the current table), OutcomeId, KSA_aspectNo, KSA_AspectValue together with a column referencing the related.

I'm not sure if I'd go for a separate Identity column as the clustered index or if I'd use ObjectiveId, OutcomeId, and KSA_aspectNo as the natural key.

Most probably I'd go with the separate column together with a few constraints... It depends 😉