When selecting power and power management solutions for a given installation, it is important to consider the power requirement of all devices involved. This should include heat dissipation ratings and power supply capacity. Additionally, given the criticality of power supply to many operations, redundancy and robustness are key factors when evaluating items such as rack power distribution systems, UPS systems or rack power enclosures. They must be sized correctly and also take into account future growth to eliminate any additional disruption in device operations. Quality power supply is essential for any IT system or networked system to run reliably and optimally.