مقایسهٔ روش‌ها

	مرور نظام‌مند ادبیات	بازبینی چتری (Umbrella Review)
حوزه	علم‌سنجی	ترکیب شواهد
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1993 (Cochrane Collaboration); 2004 (Kitchenham SLR guidelines)	2009
پدیدآور	Archie Cochrane (conceptual foundation); formalized by the Cochrane Collaboration (1993) and Barbara Kitchenham in software engineering (2004)	Grant & Booth (2009), Refined by AMSTAR-2 (Shea et al., 2017)
نوع	Evidence synthesis methodology	Framework
منبع بنیادین	Kitchenham, B. (2004). Procedures for Performing Systematic Reviews. Keele University Technical Report TR/SE-0401.	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.
نام‌های دیگر	SLR, systematic review, evidence synthesis review, structured literature review	Overview of Reviews, Meta-Review, Review of Reviews
مرتبط	5	2
خلاصه	A systematic literature review (SLR) is a structured, reproducible method for identifying, appraising, and synthesizing all relevant studies on a research question. Unlike a narrative review, it follows an explicit, pre-specified protocol — from database search strings through inclusion criteria to data extraction — so that the process is transparent, auditable, and replicable by other researchers. It is widely used in medicine, education, software engineering, and the social sciences to produce the most comprehensive possible evidence base on a topic.	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.