Creating a self-optimizing system for a business, a system that would cause it to keep production and service at a high profitability level while minimizing loss requires the removal and recreation of many parts and processes of the corporate machine. While this can be done post-hoc, after a system is already in place, it is much better to pre-optimize production while a business is still young.
Usually, the smaller the business, the more it has to profit from business management consultation, because a bigger percentage of its profits is lost to bad business practices, and it would cost it far less to optimize itself.
Small and medium businesses (SMEs) can and should hire business consultants at early stages or later to ensure all business practices are optimized from the get go. Even business that don't plan on expanding can use business consultation, in order to maximize profitability and minimize loss.