Before revision: In software development, it tends to be among the less iterative and flexible approaches, as progress flows in largely one direction ( "downwards " like a waterfall) through the phases of conception, initiation, analysis, design, construction, testing, deployment and maintenance.
After revision: In software development, it tends to be among the less iterative and flexible approaches, as progress flows in largely one direction ( downwards like a waterfall) through the phases of conception, initiation, analysis, design, construction, testing, deployment and maintenance.