The key is engaging BOTH types of thinking in a creative process. Next-level solutions emerge from engaging the unpredictability and expansiveness of divergent thinking first, and then applying the narrowing of convergent thinking to ground the new ideas
Waterfall Project Management approach, applied to software projects. Uses the same basic project structure as OnlinePMCourses, with subtly difeferent terminology. I don't know about the time estimates, but it's a useful start oint.
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