The 2012 "Supplier Responsibility Progress Report" released Friday says that Apple Inc. conducted 229 audits throughout its supply chain last year. That's up 80 percent from 127 audits in 2010.
The audits found labor, health, health and environmental violations, including instances of underage labor. Apple also outlines its response to each of the violations that were uncovered, which included ending its relationship with repeat offenders.
The report says that 78 Apple's suppliers complied with antidiscrimination standards it has set for them. But only 38 percent observed its working hours policies.