Parameters Success Rate Cost Risk Analysis Reusability Time Security User Understanding Simplicity feedback Requirement Models Waterfall low low high limited long vital no well simple simple Prototype good high low weak less weak yes Not well Spiral high high low yes well intermediate Depend high On project V-Shape XP Agile RAD RUP Scrum Incremental Iterative RUP Extreme Big bang Codefix Cocomo Win win Spiral Evolutionary Formal method Fish Quick fix