1. Referring to the systematic review on the validity and rigor of applying PDSA methodology in healthcare improvement projects (Taylor et al., 2014), Answer the following questions:

1. 2. What is the main literature gap behind the methodology of PDSA in the context of articles published in journals aiming to improve healthcare systems according to the review paper?

1. Describe the four stages of PDSA in terms of their content, milestones and how each stage contributes to the overall improvement project.
2. 3- What deficiencies have been unraveled with respect to the use of PDSA?