Lidl tried to switch to SAP, keeping their own processes and customising SAP to fit their needs. After seven years and 500 million euro spent, the project was

Lidl tried to switch to SAP, keeping their own processes and customising SAP to fit their needs. After seven years and 500 million euro spent, the project was cancelled and they went back to using their old inventory system. So, in this case, customising SAP to fit the company's processes wasn't worth it even for a rather large company like Lidl.