The programme provides a framework for businesses and other local entities to help develop new facilities and community projects, contributing a mixture of cash, goods or services.
Mr O'Reilly said in his experience, business philanthropy in general worked best when businesses had a clear view of why they were doing it.
"It's more than just being nice to people or getting a bit of good publicity.
"Unless it's part of what the business is trying to achieve in building a successful community, and it's linked directly into how they think about such things, it's not going to work in the long term," he said.
"In order to be successful, you need to have some real CEO commitment, it needs to be soaked into the business strategy, and you need a clear direction and guidance from the board and senior management.
"And then it can actually work very well."
Michael Vujnovich, manager of Project Tauranga, which runs the City Partnership Programme, said that the partners provided great value to the city.
"It makes a real difference," he said.