A successful SAP transformation requires two things to happen simultaneously. Your delivery partner needs to build and configure the technology. Running parallel, your business needs to be genuinely ready to receive it — with clear benefits, defined processes, clean data, and people who are prepared for the change.
Most organisations can do the first. The second is harder. It requires bandwidth, expertise, and independence that most businesses don't have sitting ready. That's the workstream a Business Integrator owns.