Domain knowledge about the business activities that your software is supporting is powerful. Do you know why your users want what they want? Can you suggest a

Domain knowledge about the business activities that your software is supporting is powerful. Do you know why your users want what they want? Can you suggest a better approach to solve their problem, based on your deep knowledge of business needs? Do you know the impact of requested changes on other parts of the business. This, of course, is very specific to a company/industry. Knowledge of accounting principles is often helpful for in-house developers.