Evidenced-based practice project fit a quantitative study

Does your evidenced-based practice project fit a quantitative study (external evidence) or a qualitative research design? Do the general principles of qualitative research design apply? or- Do the major factors to consider when designing a quantitative study apply? Does your study question include the characteristics of a good study question? Feasible, Interesting, novel, ethical, and/or relevant? Evidenced-based practice differs from formal research however, it can include components of qualitative, and/or quantitative research design?