It is not mandatory to engage an SAP partner for a S/4HANA conversion; it is highly recommended, though – and here's why:
Expertise and experience. SAP partners have specialized knowledge and experience in SAP systems and migrations. Not only do they know SAP products – they probably have experience with many versions of these products, and they have already dealt with different kinds of challenges while performing S/4HANA conversions.
Knowledge of best practices and methodology. SAP partners follow proven methodologies and best practices for S/4HANA conversions and have access to resources, tools, and templates that can accelerate the conversion process, minimize risks, and ensure a successful outcome.
Technical guidance and support. An SAP partner can provide technical guidance throughout the conversion process. They can assist with system assessments, data migration strategies, system configuration, and testing. Their expertise can help address any technical issues or challenges during the conversion.
Process optimization and business value. Thanks to their expertise with SAP products, SAP partners can guide you in leveraging the new functionalities and capabilities of S/4HANA to drive business value and maximize ROI.
Support and post-conversion services. After the conversion, an SAP partner can provide ongoing support, training, and maintenance services. They can help you adapt to the new system, address user concerns, and ensure a smooth transition for your organization.
Ideally, S/4HANA conversion is a process where an SAP partner and an internal client's team collaborate: the SAP partner brings their knowledge of SAP products and methodologies, and the client's team – their deep understanding of the business processes and company goals.