What disposition indicates that a personnel complaint or incident is unfounded?

The term "unfounded" is used to describe a situation where an investigation into a personnel complaint or incident has determined that there is no credible evidence or basis for the allegation made. In other words, upon review, it has been concluded that the complaint is not supported by facts or applicable standards. This classification helps to clarify that the claims raised have been thoroughly examined and ultimately found to lack validity.

In contrast, "justified" would indicate that the actions taken by personnel were appropriate and warranted under the circumstances. "Substantiated" means that there is sufficient evidence to support the claims made in the complaint, leading to a finding of wrongdoing. "Inconclusive," on the other hand, refers to situations where the investigation does not yield enough evidence to arrive at a definitive conclusion, either for or against the claims. Thus, the term "unfounded" specifically addresses situations where no evidence supports the allegations, making it the correct choice for this question.