Function-oriented modeling and object-oriented modeling are two approaches to software design that are used to create software systems.
Here’s a brief explanation of each approach:
Function-oriented modeling:
Function-oriented modeling is a software design approach that focuses on identifying and modeling the functions or operations that a system performs. In function-oriented modeling, the system is decomposed into a set of functions or modules, each of which performs a specific task. The functions are then interconnected to create the overall system. The main goal of function-oriented modeling is to create a system that is efficient, reliable, and easy to maintain.
Object-oriented modeling:
Object-oriented modeling is a software design approach that focuses on identifying and modeling the objects that make up a system. In object-oriented modeling, a system is decomposed into a set of objects, each of which has its own set of attributes and behaviors. The objects are then interconnected to create the overall system. The main goal of object-oriented modeling is to create a system that is modular, extensible, and reusable.
| Aspect | Function-oriented modeling | Object-oriented modeling |
| Approach | Decomposes system into functions | Decomposes system into objects |
| Abstraction | Achieved by breaking down the system into smaller functions | Achieved by grouping similar attributes and behaviors into objects |
| Reusability | Generally less reusable than object-oriented modeling. | Generally more reusable than function-oriented modeling. |
| Extensibility | Generally less extensible than object-oriented modeling. | Generally more extensible than function-oriented modeling. |
| Modularity | Generally less modular than object-oriented modeling. | Generally more modular than function-oriented modeling. |
| Coupling | Functions are generally more tightly coupled. | Objects are generally more loosely coupled. |
| Inheritance | Not applicable. | Supports inheritance, allowing objects to inherit attributes and behaviors from other objects. |
| Polymorphism | Not applicable. | Supports polymorphism, allowing objects to have multiple forms or behaviors. |
| Encapsulation | Not as emphasized. | Emphasized, allowing objects to hide their internal details and expose only necessary information. |
| Examples | COBOL, Fortran, and Pascal. | Java, C++, and Python. |