In most cases, authorizer will always approve the payment being assigned to them based on the duty roaster despite their tight schedule.
Usually, the payment processor will escalate to me should they not able to get hold of the authorizer or miss the payment cut-off time right after the first instance.
In the below case, I have advised Phim to pick up the phone and call the authorizer and should she not able to reach them, she may escalate to me as I will usually write email to them to approve the payment.
This is how we managed at this moment.