SAP & ERP Foundations
SAP Implementation Consulting & ERP - Startupistan Germany · Block I · study notes for revision.
The problem ERP solves
Section titled “The problem ERP solves”Picture a company where every team keeps its own records. Finance has a spreadsheet, the warehouse has another, HR has a third - and none of them talk. A single event (a sale, a shipment, someone leaving) has to be re-typed into each system by hand. The numbers drift, errors creep in, and nobody holds the full picture at once.
That disconnected-departments mess is exactly what ERP exists to kill.
The key idea is coordination, not uniformity. Each department does very different work; ERP keeps that different work in sync. One order placed ripples outward on its own: sales figures move, the warehouse is told to ship, stock drops, finance sees the incoming payment, and a low stock level can trigger a reorder - all without anyone re-keying the order five times.
What SAP is
Section titled “What SAP is”SAP = the software large organisations use to run their business - finances, staff, supply chains, customers - all in one connected system. It’s also the name of the German company that makes it. The acronym stands for Systems, Applications, and Products in Data Processing.
I don’t need the founding history for revision. The one fact that matters: SAP has been the backbone software for a huge share of the business world for decades, which is precisely why the skills are worth building.
Why demand is high and durable
Section titled “Why demand is high and durable”A very large share of big organisations run on SAP, across manufacturing, automotive, retail, energy, healthcare, pharma, and the public sector. That reach turns into steady demand through a simple chain:
What makes the demand durable rather than a passing trend: SAP is deeply embedded in how these organisations operate, and ripping it out is enormously costly and risky. So the systems stay, and the need for people who understand them stays with them.
The SAP product landscape
Section titled “The SAP product landscape”SAP isn’t one program - it’s a family of products. For now I only need to recognise the names, not use them. The three core names plus the functional module idea:
| Name | What it is | Status / direction |
|---|---|---|
| ECC | The long-established core ERP system, run for years by many organisations | Legacy / previous generation |
| S/4HANA | The newer-generation ERP - faster, more modern, built on the HANA in-memory database | Where SAP and its customers are heading |
| BTP (Business Technology Platform) | Platform for building, extending, and connecting apps around the core system | The extension / integration layer |
Cloud vs on-premise
Section titled “Cloud vs on-premise”The same ERP can be delivered two ways, and the choice shapes who runs it and how it’s customised.
| On-premise | Cloud | |
|---|---|---|
| Where it runs | Company’s own servers / data centre | Hosted and run by SAP (or a provider) |
| Control & customisation | Maximum control, deep custom changes | More standardised, guardrailed |
| Upgrades | Company’s responsibility, less frequent | Managed, regular updates |
| Direction | Established base | Where new adoption is pushed |
The functional module map
Section titled “The functional module map”ERP is organised into functional areas - often called modules or lines of business - each covering one part of the enterprise. This is a clean overview, not an exhaustive or exact list of codes.
| Area | Common name / label | Roughly covers |
|---|---|---|
| Finance | FI (Financial Accounting), CO (Controlling) | Accounts, reporting, cost control |
| Sales | SD (Sales & Distribution) | Orders, pricing, delivery, billing |
| Materials / procurement | MM (Materials Management) | Purchasing, inventory, suppliers |
| Production | Manufacturing / planning | Production schedules, plant operations |
| Logistics / supply chain | Supply-chain functions | Moving and tracking goods |
| Human resources | HR / HCM, SuccessFactors (cloud HR) | People, payroll, talent |
Where ABAP fits
Section titled “Where ABAP fits”The distinction that shapes everything downstream is configuring vs programming:
- Configuring = setting up and adjusting SAP’s built-in features to fit how a specific company works, largely without writing code. This is the consultant side.
- Programming (ABAP) = writing code to build new behaviour or customise more deeply than configuration allows. This is the developer side.
Think of it as living in a house versus going behind the walls: most users just use the ready-made rooms (configuration/features); ABAP is for changing the wiring and plumbing behind them.
The two career tracks
Section titled “The two career tracks”The two roles this prepares for aren’t a fork where I pick one and lose the other - they’re a sequence. Everyone aims for Implementation Consultant first; ABAP builds on top for those who continue.
| Implementation Consultant | ABAP Developer Associate | |
|---|---|---|
| Core work | Configuring SAP to fit a business | Programming SAP with ABAP |
| Main skill | Business processes + configuration thinking | Coding + deeper problem-solving |
| Coding? | Largely none | Yes - it’s the job |
| Position in path | First / shared goal | Continuation, builds on the consultant base |
| Who heads here | Most learners, first | Those who pull through and want to go deeper |
The prize combination is techno-functional: someone who understands the business side and can write the code. That mix is genuinely in demand.
Common misconceptions
Section titled “Common misconceptions”| Myth | Reality |
|---|---|
| ”SAP is one single program.” | A large family of connected products and modules (that’s why ECC, S/4HANA, BTP all exist). |
| ”You must be a programmer to work with SAP.” | Much SAP work is configuration and understanding business processes - no coding. ABAP is one track, not the whole field. |
| ”SAP is only for huge companies.” | Big orgs are its heartland, but it’s used more broadly than assumed. |
| ”Learning SAP = learning one tool forever.” | The skills (business processes, configuration, eventually programming) transfer and grow across roles and a whole career. |
Certification pathway
Section titled “Certification pathway”At a high level the SAP certifications run in the same order as the tracks:
-
Foundations - core digital, web, and programming groundwork. Doesn’t certify anything on its own; it makes the later steps realistic.
-
SAP Certified Implementation Consultant - the shared destination most learners reach. Qualifies for real consultant roles.
-
SAP ABAP Developer (Associate) - for those who continue, the technical track built on top.
Broadly, SAP certifications tier as Associate → Specialist → Professional (entry-level knowledge, then focused depth, then experienced practitioner). Reaching the first certification already opens doors - employability grows at each stage, not only at the very end.
Careers this maps to
Section titled “Careers this maps to”- Junior SAP Consultant
- SAP Implementation Consultant
- SAP Functional Consultant (often tied to a module: FI/CO, SD, MM…)
- SAP Business Process Analyst
- SAP Application Consultant
- SAP ABAP Developer
- SAP ABAP Cloud Developer
- Junior SAP Technical Consultant
- SAP S/4HANA Extension Developer
- SAP Techno-Functional Consultant
- SAP ABAP Developer / Consultant
- SAP Data Migration Consultant / Developer
- SAP Integration / Interface Developer
Framing it on a CV
Section titled “Framing it on a CV”The golden rule: describe what I’ve genuinely done - accurate and confident, neither overstated nor undersold.
- Overstating (“SAP certified consultant” after only the foundation) gets exposed fast in interviews and burns credibility.
- Understating sells me short.
- The test: could I comfortably back this claim up if asked to explain or demonstrate it? If yes, it’s fair. If it’d make me squirm, reword it to what I can stand behind.
- Name what I can do and where it sits in a recognised path - without claiming certifications not yet earned. Accurate claims grow as I complete more of the program.
- Tailor emphasis to the target: consultant-leaning applications foreground business-process and configuration thinking; developer-leaning ones foreground programming fundamentals and problem-solving. Same honest facts, aimed at the audience.
Success = competence, not perfection - being able to do the things reliably (mistakes and recovery included), not being flawless or fastest.
Revision summary
Section titled “Revision summary”| Must-know | One-line recall |
|---|---|
| ERP | One connected system / single source of truth that keeps different departments coordinated. |
| SAP | Leading German ERP vendor (and its software); “Systems, Applications, and Products in Data Processing”. |
| Why demand is durable | SAP is deeply embedded and costly to replace, so the systems and the people stay. |
| Three product names | ECC (legacy core), S/4HANA (new-gen ERP on HANA), BTP (extend/integrate layer). |
| Cloud vs on-premise | On-prem = control + deep customisation; cloud = standardised, managed, where new adoption goes. |
| Module map | FI/CO = money, SD = selling, MM = buying/stock, SuccessFactors = people (cloud HR). |
| ABAP | SAP’s own language; programming (developer) vs configuring (consultant). |
| Two tracks | Sequence, not fork: Implementation Consultant first, ABAP Developer Associate after. |
| Techno-functional | Business understanding + coding = the high-demand combined profile. |
| Cert tiers | Associate → Specialist → Professional; foundation → consultant → ABAP. |
| CV rule | Claim only what I could demonstrate if asked; accurate and confident. |