Scarr admits a programme of that intensity can be testing, mentally and physically, but she says you can't afford to waste energy thinking about the pressures associated with it.
"You have to treat the Olympics like any other event, yes, you are likely to make the odd mistake but you can't let that affect the focus, you have to put it behind you straightaway. You just have to accept that nobody is perfect, that providing you do your best everything will be OK."
Scarr recalls when table tennis had a strong following in Wairarapa but, unfortunately, that is now no longer the case and she regularly commutes to Palmerston North to play and umpire.
It was there, in fact, that another of this country's top officials, Mike McAvinue, persuaded her to advance her umpiring to the point where she could officiate at international level. That was less than a decade ago, so the progress made in such a relatively short space of time has been mind boggling, not less to Scarr herself.
"I've basically been able to travel the world and stay involved in the sport I love so much at the same time, it's been amazing."