do you mention the potential use of ARIS Business Simulator in the design phase?
A good way of testing proposed process changes and comparing levels of benefit.
Quality Management within the SAP BPM framework contains all the tooling required to improve the quality of products and processes within the organisation like e.g. Six Sigma (see blog: http://www.ariscommunity.com/users/frlu/2009-06-02-part-5-enterprise-bpm-framework-six-sigma )
The process simulator, which is part of the ARIS product suite, is one of the tools required to analyse the behaviour of the business processes and find bottlenecks.