From The Manufacturer/Wikipedia/People Smarter Than Us:
The P-01 9mm (accompanied by the P-06 in .40 S&W) was designed for LE and Military duty, but its compact size and the reduced weight due to its forged alloy frame made it ideal for discrete carry as well. Equipped with a decocker, the P-01 provides convenience for those who prefer hammer-down carry. The P-01 was the first CZ model to benefit from updated manufacturing technology at CZ’s Uhersky Brod factory.