May be the comments from Lars on the document Show me the timelines, baby! will offer some pointers.
- Understanding SAP HANA Performance
- Performance in SAP HANA Databases - Webinar Replay
- Advertisment - Webinar "Performance in SAP HANA Databases" slide deck
Also, it's worth mentioning that the SPS 6 documentation had been improved (again) and it now also contains information on PlanViz. You can find it in the
SAP HANA Administration Guide> Query Analysis in the SAP HANA Database
And this is even included in the online help of SAP HANA Studio nowadays 
- Lars
Regards,
Ravi