What Are the Pros and Cons of Working on Agile Projects?

To better understand the answer, let's first review some history.

Software development existed since the beginnings of the 1960s. The way software was created by that time was completely different and formal methodologies made sense at that time since they were created for that kind of development. A lot of developers were needed to write code and projects took a lot of time. It was expensive and only big companies could have the luxury to afford it. There were heavyweight methods.

Why Are Bugs So Common in Software Engineering?

There are several kinds of software defects, and all of them have completely different causes.

First, let's start with the technical defects. These are common among new and less experienced developers. For example, let's say you need an application that sums two integers and the requirement clearly states that, but when your developer delivers the software, these things happen: