The ACE model can be applied as part of the NICHE program. Both the GRN model and ACE model can be implemented together or separately, depending on the preferences of the hospital. However, a hospital is not required to use the NICHE program if an ACE unit is in place. ACE is reviewed separately here because many hospitals implement ACE programs without following other NICHE recommendations. Only 2 NICHE research reports were identified for review.