If a change came in the testing phase, then all the steps needed to be performed again, increasing the cost of even the small change drastically. Although it had its advantage, the primary trouble with such a linear model was that the cost of changes was very high. For many years software was developed using this approach. The steps were usually requirement gathering, system design, implementation, testing, deployment, and maintenance in that order. It was a linear methodology to build software, which included predefined steps to follow. The first most popular methodology to develop software was the Waterfall approach. ![]() On the surface level, these may seem similar, but they differ quite a bit in their inner workings. Scrum and Kanban are Agile project management methodologies prevalent in the IT industry.
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