this is the context :
"Encourage him or her and make it clear that even someone
with less programming experience will be a useful team
member if he or she asks, challenges keeps an eye on other
alternatives etc. If someone cannot be useful in one way
find out what he can come up with instead."
in the following context, the meaning seems more clear :
"As a PM you will have to keep an eye on the following
factors because they are obstacles to pair
programming:"
Regards