เปรียบเทียบวิธี

	ปรากฏการณ์วิทยา	การวิจัยกรณีศึกษา	การวิเคราะห์วาทกรรม
สาขาวิชา	เชิงคุณภาพ	เชิงคุณภาพ	การวิจัยเชิงคุณภาพ
ตระกูล	Process / pipeline	Process / pipeline	Process / pipeline
ปีกำเนิด	Early 20th century (Husserl ~1900–1913; Heidegger ~1927)	1984 (seminal codification)	1989 (Fairclough); 1987 (Potter & Wetherell)
ผู้ริเริ่ม	Edmund Husserl (transcendental); Martin Heidegger (hermeneutic)	Robert K. Yin (systematised in Case Study Research, 1984)	Norman Fairclough; Jonathan Potter and Margaret Wetherell
ประเภท	Qualitative research approach	Qualitative research design	Method
แหล่งต้นตำรับ	Moustakas, C. (1994). Phenomenological Research Methods. Sage. ISBN: 978-0803957466	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.
ชื่อเรียกอื่น	Fenomenoloji, phenomenological inquiry, phenomenological analysis	Vaka Çalışması (Case Study), case study design, case study methodology	DA, Critical Discourse Analysis, Discursive Analysis
ที่เกี่ยวข้อง	6	5	2
สรุป	Phenomenology is a qualitative research approach that investigates how participants live through and make sense of a specific experience. Rooted in the philosophy of Edmund Husserl and extended by Martin Heidegger, it aims to reveal the essential structures of lived experience rather than to measure or predict outcomes. The two most widely applied variants are Husserl's transcendental phenomenology, which seeks universal essences, and Heidegger's hermeneutic phenomenology, which emphasises interpretation within context.	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.