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	Studium przypadku pojedynczej jednostki w układzie podłużnym	Badanie typu studium przypadku (case study research)
Dziedzina	Metody jakościowe	Metody jakościowe
Rodzina	Process / pipeline	Process / pipeline
Rok powstania	1984 (Yin's foundational codification); longitudinal case methods in use since early 20th century	1984 (seminal codification)
Twórca	Robert K. Yin (systematic codification); roots in clinical and anthropological case tradition	Robert K. Yin (systematised in Case Study Research, 1984)
Typ	Qualitative research design	Qualitative research design
Źródło pierwotne	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
Inne nazwy	single-case longitudinal design, in-depth longitudinal case study, idiographic longitudinal study, LSCS	Vaka Çalışması (Case Study), case study design, case study methodology
Pokrewne	6	5
Podsumowanie	A longitudinal single case study is a qualitative research design that follows one bounded unit — a person, organization, program, or community — through multiple points in time. Unlike a cross-sectional snapshot, it captures how phenomena develop, shift, or respond to events across months or years, combining the contextual richness of case study methodology with the temporal depth needed to understand process and change.	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.