Structured Analysis and Design Technique

Structured analysis and design technique is like building with blocks. When we build something with blocks, we take different shapes and colors of blocks and put them together in a certain way to make a structure. Similarly, when we create a computer program or system, we use structured analysis and design technique to put together different parts of the system in a certain way.

First, we look at what the system needs to do and what it needs to include. This is called the requirements gathering phase. It's like figuring out what kind of structure we want to build before we start putting blocks together.

Once we have the requirements, we start breaking the system down into smaller blocks of functionality. This is called decomposition. We look at each block and figure out how it will work and interact with other blocks. It's like figuring out how different shapes and colors of blocks will fit together to make a structure.

We then draw diagrams to show how different blocks will interact with each other. This is called modelling. It's like drawing a picture of the structure we want to build with the blocks.

We also make sure that each block is designed properly and efficiently. This is called design optimization. It's like making sure that each block is the right size and shape to fit with the other blocks and make a strong structure.

Once we have all the blocks designed and optimized, we put them together to create the system. This is called assembly. It's like putting all the blocks together to make the structure we planned.

Overall, structured analysis and design technique is a way to plan, design, and build computer systems in a logical and efficient way. It's like building with blocks, but instead of physical blocks we use computer blocks to make software and systems.