Give three major ways that good internal quality can promote good external quality.

Before discussing the three major ways that good internal quality can promote good external quality, let's first understand what internal and external quality means. Internal quality refers to the aspects of a software product that are under the surface, such as its maintainability, reliability, and coding standards. External quality, on the other hand, refers to the visible aspects of a software product, such as its functionality, usability, and performance.

Good internal quality ensures maintainability, which means that the code is well-structured, easy to read, and follows a consistent style. A maintainable codebase promotes good external quality by making it easier for developers to understand, debug, and modify the code. This ultimately leads to faster development cycles, quicker bug fixes, and the ability to implement new features and changes more efficiently.

Good internal quality includes the creation of modular and reusable components, which allows developers to easily build upon existing code, integrate it into new projects, or share it with other developers. Reusable code can improve external quality by reducing duplication, improving consistency, and increasing the chances of catching bugs before they become issues in the final product.

If a system is designed with good internal quality principles, it is more likely to be scalable, which means that it can handle increasing amounts of work without compromising its performance, functionality, or reliability. Scalability is crucial for external quality since it ensures that as the software grows and its user base expands, it can continue to perform well, fulfill user expectations, and maintain a high level of customer satisfaction. In conclusion, good internal quality helps promote good external quality by ensuring maintainability, reusability, and scalability of the software product. These aspects make it easier for developers to create and maintain high-quality software that meets user expectations and can grow and adapt to changing demands.