I began to give tell you a story:
Customer internal office system to do a project, the project includes the reception, staff management, financial settlement, inventory management and then, we were going to do, done on-line.
After a period of time, a feature needs to be modified, so you an change change change when on-line, all functions are suspended 20 minutes later.
Another a period of time, financial settlement needs to be modified, so they change change change when on-line, and suspended 20 minutes later.
Time passed, and the customer also proposed ,,,,,
Customers began to complain, I just want to change a module, every time suspend all sectors, the loss is too great!
As a result, the reception system, staff systems, financial systems, inventory systems. Four systems came into being;
Li after a period of time, the customer asked, after you see the sign in this position ah, my name written below the name of the company, but also to show information dozen shareholders out there ,,,
So you go back and face the same demand function with four system modifications ,,, Death!
Constructed using sub-module according to a combination of two items is used in the example embodiment together, in short, a large project split into smaller modules, without disturbing each other while achieving the functions between the common basic parameters;
Dependencies between modules
Look at the structure at a glance
I write to you today to come back some time tomorrow