เปรียบเทียบวิธี

	การวิจัยกรณีศึกษา	การวิเคราะห์วาทกรรม	ทฤษฎีฐานราก
สาขาวิชา	เชิงคุณภาพ	การวิจัยเชิงคุณภาพ	การวิจัยเชิงคุณภาพ
ตระกูล	Process / pipeline	Process / pipeline	Process / pipeline
ปีกำเนิด	1984 (seminal codification)	1989 (Fairclough); 1987 (Potter & Wetherell)	1967
ผู้ริเริ่ม	Robert K. Yin (systematised in Case Study Research, 1984)	Norman Fairclough; Jonathan Potter and Margaret Wetherell	Barney Glaser and Anselm Strauss
ประเภท	Qualitative research design	Method	Method
แหล่งต้นตำรับ	Yin, R.K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Fairclough, N. (1989). Language and power. Longman.	Glaser, B. G., & Strauss, A. L. (1967). The discovery of grounded theory: Strategies for qualitative research. Aldine.
ชื่อเรียกอื่น	Vaka Çalışması (Case Study), case study design, case study methodology	DA, Critical Discourse Analysis, Discursive Analysis	GT, Grounded Theory Approach
ที่เกี่ยวข้อง	5	2	3
สรุป	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.	Discourse analysis is a qualitative research methodology that examines how language, communication, and power shape meaning, identity, and social reality. Developed across linguistics, sociology, and psychology (particularly by Norman Fairclough and Jonathan Potter), discourse analysis goes beyond content to analyze language use as a social practice that constitutes and reflects power relations, ideologies, and social structures.	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.