The key steps in the Improve phase are? $($Choose the best answer$)$

A$)$ Identify your project $Y,$ complete the charter and define the performance standards

B$)$ Benchmark the process, determine root cause, screen the root causes

C$)$ Brainstorm the $x\text{'}$s$,$ complete a regression analysis, write a control plan

D$)$ Map the process, brainstorm the X$\text{'}$s$,$ complete a GR&R$,$ calculate baseline capability

E$)$ Optimize the transfer function, document the improvement plan, identify specification for the Xs $,$ implement the improvement plan and confirm the results

The Performance Prediction Sheet

A$)$ Is a tool that allows us to compare the variance of multiple samples

B$)$ Is a tool to help us check our data for normality

C$)$ Is a tool to help model the impact of improving your $Y$ capability by adjusting the means and standard deviations of the Xs

D$)$ Is a tool that allows us to compare the means of multiple samples