What is Possible ?
Possible is (adj) 1. able to be done She agreed the changes were possible. 2. able to be or happen but not certain That field is a possible site for the factory. It is possible that the plane has been delayed. 3. used with a superlative for emphasis A bicycle is the cheapest possible way of getting round the town. as…as possible used for emphasis Please do it as quickly as possible. I want to go as far away as possible for my holiday. They will need as much time as possible to finish the job.
source: Easier English, Student Dictionary Upper Intermediate Level