Think of a house that you can build with Lego blocks. The blocks come in all shapes, colors and sizes, but they all fit together in a certain way to make a house. This is how an executable architecture works. It is a way of building computer programs like a house made of Lego blocks.
The blocks in this case are like computer code, or instructions that tell a computer what to do. The computer needs to follow these instructions step by step to do its job. When you use an executable architecture, the blocks are designed in such a way that they fit together perfectly, like a puzzle. This makes it much easier to build a computer program and to make changes to it later on.
If you imagine building a house with a pile of random Lego blocks, it would be difficult to put them together in the right way. You might have to try several different combinations before finding the right one. This is what it can be like to build a computer program without an executable architecture. However, with an executable architecture, the blocks are designed to fit together in a specific way, so you can put them together quickly and easily.
In short, an executable architecture is a way of building computer programs that uses a set of pre-designed blocks that fit together perfectly, making it much easier to build and maintain the program.