Therefore, once student’s pass their final exam they can also sit for their National Phlebotomy Certification exam. The National Healthcareer Association is the benchmark for accreditation of phlebotomy certification. Also considered are team, organizational and political dimensions that may give rise to problems at the human machine interface. For example, failure to adequately fund or resource health services (a political or organizational decision) could place extreme workload burdens on health care workers causing stress and fatigue thus increasing the likelihood of error when using eHealth systems..