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). This 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 report includes: (1) Background information about quality improvement initiatives similar to SB6 and what is known nationally and in Pennsylvania about movement up the quality levels in a QRIS; (2) A description of SB6 and its components (including a logic model); (3) A brief overview of the evaluation questions and methods; (4) Evaluation findings related to SB6 design, implementation and success rate; and (5) A synthesis of key themes and recommendations. [For the executive summary to this report, the technical appendix, and the program design appendix, "Improving Quality for Child Care Centers in Greater Philadelphia: An Evaluation of Success by 6®. Executive Summary. Publication #2016-07A," see ED579960; "Improving Quality for Child Care Centers in Greater Philadelphia: An Evaluation of Success by 6®. Technical Appendix. Publication #2016-07B," see ED579961; and "Improving Quality for Child Care Centers in Greater Philadelphia: An Evaluation of Success by 6®. Program Design Appendix. Publication #2016-07C," see ED579962.]