เปรียบเทียบวิธี

	การศึกษาเฉพาะกรณีวิกฤต	ทฤษฎีฐานราก
สาขาวิชา	เชิงคุณภาพ	การวิจัยเชิงคุณภาพ
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1980s–2006 (formalized)	1967
ผู้ริเริ่ม	Bent Flyvbjerg (formalized); Robert K. Yin (case study typology)	Barney Glaser and Anselm Strauss
ประเภท	Qualitative research design	Method
แหล่งต้นตำรับ	Flyvbjerg, B. (2006). Five misunderstandings about case-study research. Qualitative Inquiry, 12(2), 219–245.	Glaser, B. G., & Strauss, A. L. (1967). The discovery of grounded theory: Strategies for qualitative research. Aldine.
ชื่อเรียกอื่น	critical case, strategic case study, critical-instance case study, paradigmatic case study	GT, Grounded Theory Approach
ที่เกี่ยวข้อง	6	3
สรุป	A critical case study is a case study design in which the researcher deliberately selects a case that is strategically important for testing, confirming, challenging, or extending an existing proposition, theory, or policy claim. Rather than choosing a typical or representative case, the researcher argues that if the finding holds here — in this most-likely, least-likely, or paradigmatic instance — it can reasonably be expected to hold more broadly. This purposive logic transforms a single case into a powerful analytical tool.	Grounded Theory (GT) is a systematic qualitative research methodology in which theory emerges directly from data through iterative analysis, rather than being imposed before data collection. Developed by Barney Glaser and Anselm Strauss in 1967, GT prioritizes generating explanatory frameworks grounded in evidence.