In collective or many case studies, a number of cases are carefully picked. This provides the benefit of making it possible for comparisons for being made across quite a few cases and/or replication. Picking a "usual" case may help the findings to be generalised to theory (i.e. analytical generalisation) https://hbr-case-study-analysis31059.mybuzzblog.com/10726972/details-fiction-and-ivey-case-studies