Suspension/Resumption Criteria in a  Software Test Plan :
If any defects are found which seriously impact the test 
progress the test lead may choose to supend testing.

The criteria which are considered for suspension or 
resumption are :
[a] hardware / software not available at the time indicated 
in the project schedule
[b] the build contians many serious defects which seriously 
prevent or limit testing progress
[c] Assigned test resources are not available when needed 
by the test team

Resumption Criteria :
If testing is suspended, resumption will only occur when 
the problem(s) that caused the suspension have been 
resolved. When a critical defect is the cause of the 
suspension, the “FIX” must be verified by the testing team 
before testing is resumed

please correct me if iam wrong