1 Introduction

1.1 Introduction

2 The divide and conquer principle

2.1 No divide and conquer. Application: Smart energy system

2.2 With Divide and Conquer application

3 Cohesion

3.1 Functional cohesion

3.2 Layer cohesion

3.3 Communication cohesion

3.4 Sequential cohesion

3.5 Procedural cohesion

3.6 Temporal cohesion

3.7 Utility cohesion

4 Coupling

4.1 Content coupling

4.2 Stamp coupling

4.3 Routine coupling

4.4 Type use coupling

4.5 Import / inclusion coupling

5 Reusability

5.1 Analysis

6 The SOLID principles

6.1 The Single Responsibility Principle

6.2 Open Closed principle

6.3 The Liskov Substitution Principle

6.4 The Interface Segregation Principle

6.5 Implementation with and w/o Interface

6.6 Dependency Inversion Principle

7 Conclusions

7.1 Conclusions