SAP S/4HANA Migration Strategies: ECC to S/4HANA

SAP S/4HANA Migration Strategies: Choosing the Right Path from ECC to S/4HANA

Consider a company that has been using SAP ECC for quite a long time. Its finance, procurement, and supply chain departments rely on it for their daily operations. Gradually, as time passes, the company wants to achieve better efficiency, better and easier reporting, and a more modern environment for ERP systems.

From this point, we come to the topic of SAP S/4HANA Migration. However, migration is not about simply changing the systems – now there is a need to assess what needs to be migrated, what changes need to be done, and which migration strategy to choose.

Why Is the SAP ECC to S/4HANA Migration Strategy Necessary?

The SAP systems differ among companies. Some of them use custom software development, while others have too many integrations, historical data, and specific business processes.

Before beginning an SAP ECC to S/4HANA Migration process, organizations should assess their current situation and determine what needs to change.

An effective assessment will include a future view of:

• State of business processes
• Quality and amount of data
• Custom software
• Integration of systems
• Security measures and rights access
• Customer needs
• Plans for future growth

This will help the company to create an appropriate SAP S/4HANA migration strategy as opposed to implementing it during the migration process.

What Are the Main SAP S/4HANA Migration Strategies?

Businesses can use three common approaches: Greenfield, Brownfield, and Selective Data Transition.

The appropriate options will depend on how much of the existing SAP system the company wants to retain or change.

Greenfield = Start fresh

Greenfield Migration means starting with a new SAP S/4HANA environment.

A company can take advantage of Greenfield and pose the question: “Do we need any of the processes?”

Then they can create new ones based on their needs.

Greenfield can work for businesses that want to:

• Redesign outdated processes
• Get rid of unnecessary customizations
• Use standardized processes
• Make the ERP cleaner
• Make major changes in business
• In simple terms, Greenfield means starting fresh.

Brownfield = Transform the existing system

Instead of creating an entirely new environment, the company uses its existing SAP environment and turns it into S/4HANA.

Organizations that have useful data, processes, and configurations from which they want to benefit will find this approach advantageous.

However, this does not mean that companies should migrate everything without thinking, even if such processes have already proven useful.

They should check the current custom code, integrations, settings, and processes to see what still works before they migrate.

In simple terms, brownfield means modernizing an existing SAP environment.

Selective Data Transition = Choose what moves

Selective Data Transition allows businesses to choose which data and processes should move to the new SAP S/4HANA environment. It can be useful for organizations with complex SAP landscapes or specific data-retention requirements.

Furthermore, this option is beneficial for companies with more complex SAP system configurations that should follow some regulatory data-keeping requirements.
Simply put, selective data transfer means choosing what data is going to be transferred.

How Can a Business Choose the Right Migration Strategy?

It’s not possible to have one solution that fits all businesses.

All companies need to start with questions such as the following:

• Is SAP ECC functioning well?
• What processes must be maintained?
• What processes are in need of revision?
• How much information does the organization plan to move?
• What degree of change is expected in the future?

The answers to these questions can help organizations choose a technique that best corresponds to their conditions.

How Does Cloud Migration Affect the SAP S/4HANA Strategy?

The process of SAP On-Premise to the Cloud migration is not merely transferring the ERP system to the cloud.

Although there are many benefits, such as flexibility and meeting the requirements of the modern business, organizations should take into consideration:

• Data control
• Access management
• Integrated systems
• Application dependency
• Continuity
• Preparedness

Organizations must take advantage of this opportunity to simplify their processes and create a much better SAP system.

How Should Custom Code Be Managed During SAP S/4HANA Migration?

Many SAP ECC systems have code created many years ago. Some of the codes may still be of importance, while others are no longer relevant.

Companies can use the approach of Keep ? Redesign ? Retire

• Keep means leaving the customizations that still serve an important purpose in the business.
• Redesign refers to any customizations that could benefit from SAP S/4HANA.
• Retire encompasses outdated customizations no longer relevant to the business.

How Should Businesses Prepare Their Data?

Data preparation is an important part of SAP S/4HANA migration. Moving unclean or outdated data can result in duplicates, incomplete records, and other problems after migration.

So companies need to do the following:

• Eliminate duplicated records
• Check the outdated records
• Check that the system does not miss any data
• Collect the necessary historical information
• Compare the old and the new data
• Check the migrated information

Good data preparation can make the migration more accurate and reduce problems after go-live.

How Do SAP S/4HANA Migration Tools Help?

Migration tools can support organizations in planning, transferring, testing, and validating data during SAP S/4HANA migration. The SAP S/4HANA Migration Cockpit is a useful tool for carrying out structured data migrations in view of the presence of built-in migration procedures and objects.

It is worth noting that there are different SAP S/4HANA migration tools that are stand-alone. These tools can be used for assessing the organization’s system of the organization. They can check the custom code, integration, and the data for possible errors. They can support the organization with a migration approach but should not formulate it.

In the same way, the company has to know what its goals of migration are, what data should be migrated, and what particular processes should be modernized.

How Should Businesses Test Before Go-Live?

Testing is required to take place before the moment when the system starts functioning in order to make sure that the data, processes, integration, and user access are correct.

Yet testing may include certain activities as defined below :

• Data correctness check.
• Business processes testing.
• Integration tests.
• User acceptance tests.

The Importance of Employee Training

After SAP S/4HANA migration, the finance, procurement, sales, production, IT, and supply chain teams will undergo alterations in workflows, screens, processes, and duties. Training, communication, testing, and assistance after go-live can support employees in adapting to the changes.

SAP specialists and students can become members of SAP Communities and share migration experience with others, stay informed on the SAP S/4HANA news, and enhance their skills.

Conclusion

SAP S/4HANA migration may be an important business choice and does not have to be a complicated one.

The process becomes easier for organizations when it is divided into uncomplicated steps:

Whether a company selects Greenfield, Brownfield, or Selective Data Transition, the best method is the one fitting the current SAP environment and the future business objectives.

There is no better way for businesses and experts getting ready for the next phase of the SAP transformation than being a part of SAP learning communities and sharing their practical migration experiences.

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Author: khushboo guglani from Prompt Edify Pvt Ltd on behalf of Prompt Edify Pvt Ltd.

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