The Success By 6® (SB6) initiative is designed to support early care and education centers in improving and sustaining quality in Pennsylvania's Keystone STARS Quality Rating and Improvement System (QRIS). The SB6 evaluation report examines implementation and outcomes. The findings have implications for SB6 continous quality improvement process and can inform the broader field of ECE quality improvement. SB6 is at a point in implementation that is ideal for reflection and evaluation. This technical appendix accompanies the report and provides more information and details on methodology, as well as additional results in implementation and outcomes. [For the full report, the executive summary, and the program design appendix, "Improving Quality for Child Care Centers in Greater Philadelphia: An Evaluation of Success by 6®. Final Report. Publication #2016-07," see ED579959; "Improving Quality for Child Care Centers in Greater Philadelphia: An Evaluation of Success by 6®. Executive Summary. Publication #2016-07A," see ED579960; and "Improving Quality for Child Care Centers in Greater Philadelphia: An Evaluation of Success by 6®. Program Design Appendix. Publication #2016-07C," see ED579962.]