"There is no clear evidence of Savile operating within a paedophile ring although whether he was part of an informal network is part of the continuing investigation, " the report added.
"The report does identify that the department could look at the introduction of informal dispute resolutions that offer a viable alternative to litigation for families, " she said.
Alcoa will provide the informal kickoff to first-quarter earnings season Monday afternoon as the first Dow Jones industrial average component to report figures for the January-March period.