These systems are used either as stand-alone units or in integrated workstations called pods or systems. These units are usually integrated with various types of pick to light[definition needed] systems and use either a microprocessor controller for basic usage or inventory management software. These systems are ideal for increasing space utilization up to 90%, productivity levels by 90%, accuracy to 99.9%+ levels and throughput up to 750 lines per hour/per operator or more depending on the configuration of the system.