Natalie and her team identified a process problem in their unit: the operating rooms $($OR$)$ are taking too long to be cleaned and disinfected, which is causing a back up in the schedule for both patients and surgeons. She puts together a team of people to work on this process. First, they map the process problem.Then, they work to collect data on all of the dimensions of the OR sanitation process and select a goal. Once they have completed this work, they create a plan for implementation and implement their improvements. Over the next $30$ days, Natalie and her team study whether their improvements are working.They continue collecting data and then they have a meeting to determine whether the process improvemen was successful. Natalie has successfully utilized which quality improvement model?O LEANO SIX SIGMAO FOCUS$-$PDCA HIGH RELIABILITY