SAFe is optimized for Systems Development (including software development), and can be used across the entire enterprise (including non-IT) by standing up multiple instances of SAFe. There are four basic versions: Essential SAFe, which defines the ART and related team practices (ideal for groups of 75 – 150); Portfolio SAFe, which adds strategic Portfolio practices – those that connect strategic decision-making to budgeting and work definition – to Essential SAFe; Large Solution SAFe, which adds methods for coordinating the work of multiple ARTs delivering one integrated solution to Essential SAFe; and Full SAFe, which adds Portfolio practices to Large Solution SAFe.