Finance (FI)

This is where all the accounting work happens, like the general ledger, payables, and receivables. That part hasn’t really changed. In S/4HANA, financial postings are streamlined through the Universal Journal, which also impacts processes like automatic account determination in SAP, making postings more consistent and easier to track.

What has changed is how the data is handled. In ECC, financial data used to sit in multiple places, which made reporting slower and closing a bit messy.

Now, many organizations adopting S/4HANA Finance report up to 40% faster financial close cycles due to the Universal Journal and real-time processing. 

Controlling (CO)

Controlling is used for tracking costs and internal numbers.

In ECC, FI and CO didn’t always line up neatly. That meant extra effort was needed to match things.

In S/4HANA, they’re much more in sync. Financial and cost data move together, so less fixing is needed later.

Materials Management (MM)

The biggest shift here is the Requirement for S/4HANA Sourcing and Procurement. Stock updates happen instantly. So, no more waiting for nightly batches to see if your inventory is updated. Inventory updates now happen instantly, which directly improves processes like inventory management in SAP MM, where stock accuracy is critical for operations.

Sales and Distribution (SD)

This is your order-to-cash flow, orders, deliveries, and billing.

Nothing dramatic has changed here, but it feels smoother. Orders process faster, and stock visibility is better. This real-time visibility also supports smoother logistics operations, including processes like stock transport orders in SAP, where material movement between plants needs accurate tracking.

Production Planning (PP)

This is used in manufacturing. In ECC, planning often meant waiting. Now, MRP runs in real time.

That means decisions can be taken immediately without waiting for scheduled runs.

Extended Warehouse Management (EWM)

This is where warehouse work happens: storage, picking, and stock movement. If you’ve used WM before, this feels more detailed. Tracking is tighter, and control is better.

It may feel heavy at first, but once you get used to it, you can clearly see what’s happening across the warehouse.

Transportation Management (TM)

This handles shipments and deliveries. Instead of planning in silos, it works alongside the rest of the system. So when something changes, you see it early, and planning stays closer to what’s actually happening.

Plant Maintenance (PM)

The PM deals with machines and equipment. It tracks breakdowns, schedules maintenance, and keeps operations running.

The idea hasn’t changed much, but tracking and reporting feel more direct.

Project System (PS)

This is used for project-based work. It tracks timelines, budgets, and resources.

In S/4HANA, it connects more closely with finance, so cost visibility is clearer as the project moves forward.

HCM vs SuccessFactors

In ECC, HR was earlier handled inside the system through HCM.

Now, many of those functions are moved to SuccessFactors, which runs on the cloud.