PO workflow

Hi All,

We have a workflow currently implemented in system like below.

Scenario 1:

Buyer raises PO and it will to go to PURCHASING MANAGER for approval and after his approval it will to go to Director of Purchases for <10,000  and workflow is completed after sending the notification back to buyer.

<$10,000   buyer-->Purchasing Manager-->Dir of Purchases-->Buyer

Scenario 2:

if >10,000 it will  go to Chief Admin Officer after director of purchase approval and  workflow is completed after sending the notification back to buyer.

>$10,000   Buyer-->Purchasing Manager-->Dir of Purchases-->Chief Admin Officer-->Buyer

1) Now my question is in case if the DIRECTOR OF PURCHASES is OOO .Is it possible to get the >10,000 PO bypass that approval and forward to Chief Admin Officer by the Purchasing Manager after  his approval.