The African National Congress is more than ready for its policy conference, secretary-general Gwede Mantashe said on Monday.

"There have been very robust debates within our branches, regions, provinces [and] alliance structures, and [among] the public, on the policy propositions," Mantashe told reporters in Johannesburg.

"We are very confident that the policy conference... will bring together all those discussions and produce outstanding policy outcomes."

The ANC's four-day policy conference is set to start at Gallagher Estate in Midrand, Johannesburg on Tuesday.

Mantashe said about 3500 delegates were expected to attend.

The delegates comprised branch delegates, national executive committee members, the ANC leagues, alliance partners, deployees and business representatives, he said.

Tuesday's session would start with an address by ANC president Jacob Zuma.

The conference would then have a closed plenary session.

Inputs on three of the ANC's main policy documents -- organisational renewal, strategy and tactics and the state intervention in the mining sector, as well as the national development plan and commission guidelines -- would be received.

"All submissions that have been made by individuals and organisations have been sent to all relevant sub-committees," said Mantashe.

"These would assist in ensuring that the conference considers these discussions broadly and inclusively."

He said the ANC would ensure that all concerns would be raised and considered.

The second day of conference would involve "commissions" discussing the party's 12 policy documents. The commissions would report back on the third day and fourth day, said Mantashe.