เปรียบเทียบวิธี

	Mapping Review	การทบทวนแบบร่ม
สาขาวิชา	วิทยาศาสตรมิติ	การสังเคราะห์หลักฐาน
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	Late 1990s–2000s; major methodological formalization ~2010s	2009
ผู้ริเริ่ม	Buckland & Gann (1998); formalized by systematic review community (Campbell Collaboration, Collaboration for Environmental Evidence)	Grant & Booth (2009), Refined by AMSTAR-2 (Shea et al., 2017)
ประเภท	Systematic evidence mapping methodology	Framework
แหล่งต้นตำรับ	James, K. L., Randall, N. P., & Haddaway, N. R. (2016). A methodology for systematic mapping in environmental sciences. Environmental Evidence, 5(1), 7.	Grant, M. J., & Booth, A. (2009). A typology of reviews: An analysis of 14 review types and associated methodologies. Health Information & Libraries Journal, 26(2), 91–108.
ชื่อเรียกอื่น	evidence map, systematic map, research map, literature map	Overview of Reviews, Meta-Review, Review of Reviews
ที่เกี่ยวข้อง	6	2
สรุป	A mapping review (also called a systematic map or evidence map) is a form of systematic review that aims to chart the extent, range, and nature of evidence on a broad topic rather than synthesize findings into a single pooled answer. It categorizes studies by key dimensions — such as intervention type, population, outcome, and study design — and presents the resulting landscape visually and tabularly so that researchers and practitioners can identify clusters of evidence, knowledge gaps, and priorities for future primary research or deeper synthesis.	An umbrella review is a systematic synthesis of multiple systematic reviews addressing overlapping or related research questions, typically on the same topic or intervention. Also called a 'review of reviews' or 'overview of reviews,' umbrella reviews consolidate evidence when two or more high-quality systematic reviews exist on the same clinical question. Grant and Booth (2009) formally categorized this methodology; Shea et al. (2017) developed AMSTAR-2, the critical appraisal tool for assessing the quality of included reviews. Umbrella reviews are essential when numerous systematic reviews produce conflicting conclusions, when rapid synthesis of evidence is needed for policy or clinical guidance, or when evidence has accumulated faster than any single systematic review can capture.