It is important for the client and the engineering team to maintain open communications even after the deliver of the product because
1) One of doctrine of Six Sigma which is a tool used to improve processes requires the input of effort meant to attain a stable process that can be easily predicted and geared towards the reduction of variation in the process is a pre requisite for the business to succeed
2) Communication can also help in product monitoring and control as well as ensuring that the product performance requirements are met
3) Communication between the client and the engineering team can serve as a means of reporting failures and collecting data for analysis
