Four Stages of PDSA

Referring to the systematic review on the validity and rigor of applying PDSA methodology in healthcare improvement projects (Taylor et al, 2017), Answer the following Questions:

– Describe the four stages of PDSA in terms of their content, milestones and how each stage contributes to the overall improvement project.https://www.researchgate.net/publication/256500238_Systematic_review_of_the_application_of_the_plan-do-study-act_method_to_improve_quality_in_healthcare