Even when planning is done carefully, there are still issues that can occur during the implementation phase. These require more funds or other adjustments to make sure everything runs smoothly. If, for example, raw materials costs rise unexpectedly or new regulations by the government affect production costs then this could cause a major disruption to your original budget and require rapid changes before you can move forward. In general, stakeholders will be more scrutinizing of larger projects. They may expect detailed descriptions on how the dollar was spent to reach desired results. Decisions can be heavily politicized without proper justification, which increases the complexity of budgeting.
In order to effectively manage budgets, it is important that you understand macroeconomic trends and the microlevel objectives of projects. Only then can you make an informed decision about how resources are best allocated. When implementing strategies that are thoughtful and take into account both the short-term needs as well as long-term goals, they will have a better chance of being successful.