I trained as a chartered management accountant, and budgetary control was a major tool in controlling business finance dating back to the founding of my institute in the 1920s. So, one hundred years later, how is it doing?
Depends on size. As a management tool it becomes more relevant as a business gets bigger. Most businesses by number are one-man or woman outfits. The only time to create a budget is when it is demanded by a bank before granting them a loan. Banks believe this will force the customer to think carefully about cash flow. However, once the loan is obtained (or rejected) the budget is never referred to again. Using it to control the business is quite rightly an alien concept. The main management tool here is the bank balance. Cash is king.
Organisations with say 200 or more employees are more complex and almost always have a system of budgetary control together with monthly management accounts. They can’t be managed blind. Refer to the management guru Peter Drucker’s most famous quote, “You can’t manage what you don’t measure”.