1 Complexity of software systems

1, the source of software system complexity

Complexity of the problem domain

The difficulty of managing the development process

Flexibility that is ubiquitous throughout the software development process

The difficulty of describing all States of a discrete system

2.5 Common properties of complex systems

Hierarchical organization

Relative primitive

Separation of concerns

Common model

Stable Intermediate State

3. How to solve the complexity of software system

(1) Decomposition

Decomposition of algorithms: Structured programming

Object-oriented decomposition

(2) Abstraction: A generalized, idealized model

(3) Hierarchical features: Class structure: part of

Object structure: is a

4. Methodology for solving the complexity of software systems

Modeling

Elements of Software Design methodology:

notation

Process

Tools

Object-oriented development model

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1 Complexity of software systems