手法を比較

	複数事例に基づく単一事例研究	複数事例研究
分野	質的手法	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1984 (Yin first edition); 1995 (Stake)	1980s–1990s (Yin's first edition 1984; Stake's collective case study concept 1995)
提唱者	Robert K. Yin (embedded case design); Robert E. Stake (case study methodology)	Robert K. Yin (systematic replication logic); Robert E. Stake (naturalistic/collective case tradition)
種類	Qualitative case study design	Qualitative research method
原典	Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169
別名	embedded single-case study, single-case embedded design, holistic embedded case study, single case with multiple units of analysis	comparative case study, multi-site case study, collective case study, cross-case analysis
関連	6	6
概要	A multiple case-based single case study — also called an embedded single-case design — is a qualitative strategy in which a researcher investigates one bounded case (the primary unit of analysis) by systematically examining multiple embedded sub-units within it. Rather than studying several separate cases for comparison, the design focuses all analytical attention on one overarching case while using variation across its internal sub-units to build a richer, more robust understanding of that single case.	Multiple-case study design investigates two or more bounded real-world cases using the same research protocol, then compares findings across cases to identify patterns, contrasts, and explanatory insights that a single case could not produce. Developed primarily through Robert Yin's replication logic and Robert Stake's collective case tradition, the approach is particularly powerful when a researcher needs to determine whether a phenomenon occurs under varied conditions or to test an emerging theoretical explanation against rival contexts.