Programmers were trained by engineers. That training dictated how they apporoched software development. Bulding software development is like creating a work art,it requires creativity in design software development remains malleable. The biggest problem with software dedelopment is changing requirement. There are domains where requirement can’t change,but most project have changing requirement. Programmers must assume that they know everything,when asking questions it diffucult or slow the knowledge gap grows.
These methods impose a displiciplined process upon software development with aim of making software development more predictable and more efficient. Engineers work on a series of drawings that pricisely indicate what need to be buid and how these things need to be put together software development|: construction is so cheap as to be free. In the software all the effort is design,and thus requires creative and talented people. Have a goog plan before you create an software development like engineers before they build a house,bridge whatever they plan first. The software is written without much underlying plan ,when system grows it difficult to addc new feartures.
-Design: Which is difficult to predict. -construction : which is esier to predict. Whemn you have the design , then you can p[lan for constraction.