Well, I'm starting to read the excellent book "Clean Architecture: A Craftsman's Guide to Software Structure and Design" by author Robert C. Martin, which is why I decided to write a bit about some important themes described in the work.
We start with an important subject, which is the difference between Software Design and Architecture.

Effective software development requires a clear understanding of two fundamental concepts: software design and architecture. Although often used interchangeably, these terms describe distinct yet complementary aspects of the software creation process. To illustrate these differences, we can compare them to the different systems comprising a human body, where each part plays an essential role, but all work in harmony to ensure the proper functioning of the whole.

Differences Between Software Design and Architecture

Software architecture is like the skeleton of the human body: a structure defining the arrangement and interconnection of the main components, just as bones support and connect all parts of the body. In the context of software, architecture involves high-level decisions about the systems and platforms to be used, the organization of code into modules or services, and the communication patterns between these components.

On the other hand, software design is comparable to the nervous system, responsible for ensuring that signals move efficiently throughout the body, controlling specific functions. In software, this translates to detailed specifications on how each part of the system should operate and interact, detailing algorithms, user interface patterns, and internal data management.

Objectives and Importance

The goal of software architecture is to create a robust and scalable foundation that supports the system as a whole, ensuring that the software can grow and adapt without compromising its functionality. Effective architecture facilitates the maintenance and expansion of software, while poor architecture can lead to a system that is difficult to understand and costly to modify.

Software design, in contrast, aims to maximize the efficiency and quality of the system's internal operations. Good design improves code readability, simplifies debugging and maintenance, and reduces the risk of errors. It ensures that each software component functions correctly within the context established by the architecture.

Costs and Examples

Investing in good software architecture and design can be significant, but the costs of neglecting them are often higher. For example, the software incident with Obamacare in the United States showed how poorly planned architecture can result in system failures and exorbitant repair costs. It is estimated that the costs to fix the issues exceeded several times the original development budget.

Failures in Software Development

Failures in delivering high-quality software often occur due to several factors, such as overconfidence, haste, and market pressure. Developers might overestimate their ability to create complex systems within tight deadlines, resulting in poorly conceived architectures and rushed designs. The pressure to release products quickly can lead to poorly considered design and architecture decisions, negatively impacting the quality and sustainability of the software.

The Importance of Clean Code

Clean, well-organized code is crucial for the maintenance and scalability of software. It allows other developers to quickly understand the system, reducing the time needed to implement new features or fix bugs. Moreover, clean code facilitates testing, which is essential for ensuring the stability and reliability of software over time.

Conclusion

Software architecture and design are critical components that determine the success of a development project. Like a human body, each aspect must function in harmony to ensure the health and effectiveness of the system. Understanding these concepts and applying them carefully is key to avoiding the costs and failures associated with software development, culminating in the creation of durable and effective solutions.