Good Thing there is no CMMI Level 0 (Zero) - Every body starts at Level 1
A maturity level 1 organization does not mean that there is no software process. The software process is unpredictable because the process is dependent on the current staff. There is no organization in the world that has no process of producing software but there are organizations that lack sound management of the software process. Good management of the software process in an organization will lead to efficiencies of the software process that they currently have. Level 0 is not reasonable for any organization because most organizations own a process to deliver software. The process might not be efficient but a process is a process and this the reason why the Capability Maturity Model does not have a Level 0. A Level 5 organization has pretty much a really fined tune process.