"We'll see how he goes," said David, who, as the chief financial officer, works alongside his managing director father Philip, his cash clerk mother Peta and his site engineer sister Anthea.

Scenic World is at Katoomba in the Blue Mountains and is open every day.

The Hammon succession plan includes not only who will work in the business bought by David's grandfather Harry 63 years ago, but the finer details of how a specialised operation with unique equipment is run.

What started as an old green shed and a small passenger carrying car that held 24 people and ran only on the weekends in 1945 now hosts about one million visitors a year.

As well as the Scenic Skyway there is the Scenic Cableway - the steepest cable car ride in Australia - a 2.2-kilometre elevated boardwalk and a 100-seat cinema.

"Most of how everything runs is in Dad's head so at the moment we are working to get absolutely everything that goes on at Scenic World onto a computer program so that we have a record," David said. "Dad is 63. If he wants to leave in five years' time we have to worry about that now."

He said he believes a smooth transition will be one that involves good communication with the family.

To achieve that success there is a regular family meeting and they have found the right people to help.

"The main trick is to find someone who can guide you through it," David said. "We have an accountant that has become a specialist in family business."