Institute for Healthcare Improvement (IHI) Proposed a Process for Quality

Institute for Healthcare Improvement (IHI) proposed a process for quality improvement with steps known as "PDCA." When explaining the steps to a group of nurses interested in improving the process of medication reconciliation for heart failure patients with high rates of recidivism, the instructor states:

A) P stands for process. Following a top-down flowchart provides the steps for reviewing patient medications taken at home compared to those prescribed during hospitalization.
B) D stand for deviation, which is an alteration in the expected drugs ordered.
C) C is for check if the process for change worked. Was there an improvement in accurate reconciliation? And what was learned? A stands for algorithm, which includes all steps of the process.
D) A stands for algorithm, which includes all steps of the process.