At which practice group level are processes optimized using statistical techniques to enhance performance?

Processes are optimized using statistical techniques at Practice Group Level 4. This level focuses on quantitatively managing processes and involves the use of measurement and analysis to understand process performance. At this stage, organizations implement robust statistical methods to assess and improve their processes, which leads to enhanced performance.

By analyzing data and understanding variations in process performance, organizations can make informed decisions to fine-tune and optimize their processes effectively. This level represents a maturity in the organization's ability to not only control processes but also to predict their performance and enhance it continuously through data-driven approaches. Thus, the reliance on statistical techniques marks a significant advancement in optimizing processes compared to earlier practice group levels, which might focus more on basic process implementation and standardization without the intensive use of quantitative analysis.