#yin-methodology

Design rigorous case study research following Yin's approach. Types: 1. Single case (critical, unique, revelatory). 2. Multiple case (literal replication, theoretical replication). Design elements: 1. Research questions: 'how' and 'why' questions best suited for case studies. 2. Propositions: theoretical propositions from literature to guide data collection. 3. Unit of analysis: individual, organization, program, or event being studied. 4. Logic linking data to propositions: pattern matching, explanation building, time-series analysis. Data collection: 1. Multiple sources: documents, interviews, observations, archival records. 2. Case study protocol: procedures and general rules to follow. 3. Chain of evidence: clear links from questions to conclusions. Quality criteria: construct validity (multiple sources), internal validity (pattern matching), external validity (replication logic), reliability (case study protocol).