You really need to stay frosty when buying a house. If you don’t, your dream home may turn out to be a moldy mistake. Never blindly trust the seller’s word about the condition of the house. Instead, you should use an independent party to conduct a proper inspection of the premises. This way, there are no nasty surprises waiting for you after you move in.
In a way, purchasing a new software system is a similar deal. Usually it involves a major financial investment and countless work hours. In a worst case scenario, the product is not at all what was promised and faults are being fixed months after the delivery. A costly system may even be left unused. So, do not ignore the most important system inspection round: acceptance testing.
When buying a house, the seller may be liable for a good few years. In the software business, responsibility may change owner at the very moment the buyer stamps the delivery completed. That is why you need to be sure there are no nasty surprises around the corner.