Physical artifacts check with any Bodily evidence related to the case, for instance tools, solutions, or Bodily environments. These artifacts can provide tangible insights in to the case, complementing the information collected from other sources. You could read the preface and Chapter one of Yin's guide listed here. See https://cashsvzxe.wizzardsblog.com/34698245/not-known-facts-about-harvard-case-study-help