(2) Full implementation : The introductory implementation phase provides the foundation for the next phase which is a more stringent implementation of the practices of the previous phase.

Again, reviews are made following every increment. Analysis of failures and customer surveys at this point can provide valuable input as to areas where improvement is possible.
 
 

(3) Advanced implementation : The Cleanroom process is fine-tuned to the organization and is continually improved using new advances in SE technology. Expert practitioners carefully monitor advances made in Cleanroom technology and act as mentors for the project teams.

Customer feedback for the final product is used to learn how effectively Cleanroom was applied and how the existing Cleanroom practices can be further streamlined. Statistical testing is followed with more strictness.