পদ্ধতির তুলনা করুন

	আধা-কাঠামোগত সাক্ষাৎকার	কেস স্টাডি গবেষণা	গ্রাউন্ডেড থিওরি
ক্ষেত্র	গুণগত	গুণগত	গুণগত গবেষণা
পরিবার	Process / pipeline	Process / pipeline	Process / pipeline
উদ্ভবের বছর	1946 (Merton & Kendall); codified as a standard method through the 1980s–1990s	1984 (seminal codification)	1967
প্রবর্তক	Robert K. Merton and Patricia Kendall (focused interview, 1946); further systematised by Steinar Kvale	Robert K. Yin (systematised in Case Study Research, 1984)	Barney Glaser and Anselm Strauss
ধরন	Qualitative research method	Qualitative research design	Method
মৌলিক উৎস	Kvale, S., & Brinkmann, S. (2009). InterViews: Learning the Craft of Qualitative Research Interviewing (2nd ed.). Sage. ISBN: 978-0761925422	Yin, R.K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Glaser, B. G., & Strauss, A. L. (1967). The discovery of grounded theory: Strategies for qualitative research. Aldine.
অপর নাম	guided interview, semi-standardized interview, focused interview, SSI	Vaka Çalışması (Case Study), case study design, case study methodology	GT, Grounded Theory Approach
সম্পর্কিত	6	5	3
সারসংক্ষেপ	The semi-structured interview is a qualitative data-collection method in which the researcher prepares a set of key questions or topic areas in advance but remains free to probe, follow up, and reorder as the conversation evolves. Unlike structured interviews — which fix every question and sequence — or unstructured interviews — which are entirely open — the semi-structured format balances comparability across participants with the flexibility needed to capture the depth and nuance of individual perspectives. It is the most widely used interview format in social science, health, and education research.	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.	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.