She said she had got her head around the fact that last week's 53-32 win over England in Invercargill was her last in charge of the team.
"As you can understand it is a strange time really, I am disappointed, but everything has to come to an end at some point in time," said Aitken. "I do feel really pleased that I did have that opportunity to finish with them in New Zealand in the end, and Invercargill was a lovely way to finish up really."
Aitken, who has worked alongside Taumaunu for the past four years, believes the new coach will have no problem slotting in at such short notice.
The former Silver Ferns captain will join the team in camp in Auckland on Monday, before they leave for Perth for next Sunday's opening test against Australia. The series will herald a new phase in the contests between netball's two superpowers, with Australian coach Lisa Alexander new in her job after replacing Norma Plummer following the Diamonds successful world title defence in July.
Taumaunu said she was honoured to take on the top job. In her playing days, the defender's playing number was nine. Now she will be the ninth coach of the New Zealand side since international competition began in 1938.
With the Australian series her immediate focus, Taumaunu said any plans around building her management team have been put on hold. Magic coach Noeline Taurua, who was Taumaunu's main rival for the top job, will continue to serve as assistant coach for the Constellation Cup series.
"I haven't really given [management team] a great deal of thought. I'm certainly looking forward to working with Noels for this series," said Taumaunu. "Beyond that, I haven't really had time to think about that, and I'm not sure I really will until next month."