手法を比較

	クリティカル・ケース・スタディ ― 戦略的単一ケース研究	ケーススタディリサーチ（Case Study Research）
分野	質的手法	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1980s–2006 (formalized)	1984 (seminal codification)
提唱者	Bent Flyvbjerg (formalized); Robert K. Yin (case study typology)	Robert K. Yin (systematised in Case Study Research, 1984)
種類	Qualitative research design	Qualitative research design
原典	Flyvbjerg, B. (2006). Five misunderstandings about case-study research. Qualitative Inquiry, 12(2), 219–245.	Yin, R.K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169
別名	critical case, strategic case study, critical-instance case study, paradigmatic case study	Vaka Çalışması (Case Study), case study design, case study methodology
関連	6	5
概要	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.	Case study research is a qualitative research design that investigates a specific phenomenon, individual, group, organisation, or event in depth within its real-world context. Systematised by Robert K. Yin in 1984, it supports single-case and multiple-case designs and draws on multiple data sources — interviews, observation, documents, and artefacts — to build a rich, contextualised account of a bounded unit.