Why does the decoration budget always exceed the limit?

The renovation costs continue to exceed the budget, which shows that the initial renovation budget was unreasonable. There are several main reasons for this situation:

1. The decoration contract was not carefully reviewed, and problems existing in the contract were not discovered. For example, some contracts lacked specific construction quantities and only had unit prices. Construction projects, hidden charging projects, missed construction projects, etc. will lead to increasing decoration costs in the later period;

2. There is no sufficient inspection of the market, resulting in various materials actually purchased in the later period exceeding the initial purchase price. budget planning.