What main difficulties can arise when creating a product from scratch?

Main challenges when creating a product from scratch include:

• Requirements definition: often difficult to precisely understand what users need and how to implement it.
• Architecture planning: choosing the right technologies and code structure to ensure the product is scalable and maintainable.
• Time and resource management: limited deadlines and budgets can affect the quality and scope of functionality.
• Testing and debugging: identifying and fixing errors early in the development process.
• Integration with other systems: if the product needs to interact with external services.
• Security assurance: protecting data and preventing vulnerabilities.

Example: when developing a web application from scratch, it is important to immediately think through the project structure and module separation to make it easier to add new features and fix bugs in the future.