So, the big decision has been made. The company is going to purchase an ERP system. You have got the backing of the MD, the CFO and the majority of the Board (there is always one!). All you have to do is “install it”. There are no more big decisions and no need to keep bothering the executives with any more big decisions on this matter, Right? Actually, the process has just started and there are a multitude of big decisions to make and you will certainly need the support of the executives in one crucial choice: Do you change some or all of the business processes to accommodate the new software or do you modify the software to fit the existing company processes?