A customer pointed that BPM Suite 6.4 Installation Guide explains only Tomcat 7 (JWS 2) installation.

https://access.redhat.com/documentation/en-us/red_hat_jboss_bpm_suite/6.4/html/installation_guide/chap_installation_options#sect_the_generic_deployable_bundle_installation

But BPMS 6.4 supports Tomcat 8 (JWS 3) as well.

https://access.redhat.com/articles/704703

QE team has already confirmed that the same steps are applied to both Tomcat 7 and 8. This information should be added to final documentation , maybe as a "Note" stating that same steps are applied for both versions.