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

Suspension Criteria in a  Software Test Plan :

In case of any serious issues are found during the QA the
testing is suspended by the QA member in absence of higher
QA people. And that is documented in the test plan for the
official purpose.

Resumption Criteria in a  Software Test Plan 

The issue that caused the suspension should be resolved and
documented in the test plan for the official purpose.The
issue must be re validated by the QA member.

Every QA process should be documented.That will help to
ensure the QA .

If any one of you have any different opinion please post
your reply.