Clinical information systems

In what ways can informatics help healthcare providers overcome current or emerging barriers to care and increase access to safe, quality healthcare? Include a discussion of the value and challenges of clinical provider order entry (CPOE) and clinical decision support systems (CDSS) in providing safe patient care in your response. Why are heuristic principles (human factors/usability/user-centered design) important for efficient clinical information systems such as CPOE and CDSS?