How test cells and test environments are different?

Hi Humayun,

Test cells provide a way to conveniently group together a set of lab resources that describe a test environment.
Check out following  topic in Infocentre  for more details --
http://www-01.ibm.com/support/knowledgecenter/SSYMRC_5.0.2/com.ibm.rational.test.qm.doc/topics/t_cre_test_cells.html

Also here is a previous forum discussion on same topic--
https://jazz.net/forum/questions/117964/difference-between-test-environment-test-cell-in-rqm-401-why-we-are-using-lab-resources-as-we-have-alreadt-set-the-test-environment

Hope that helps!
-Vidya