According to our text, Information Technology Project Management, "A systems development life cycle (SDLC) is a framework for describing the phases of developing information systems." For this discussion, please respond to the following prompt(s):

When is a predictive life cycle such as the waterfall life cycle model most appropriate to use to develop an information system? Consider the predictability of scope and cost.

When is an adaptive software development (ASD) life cycle model most appropriate to use to develop an information system? You must submit an initial post consisting of no less than 250 words.