SAP Entwickler / Berater, ABAP Teamleiter, Junior Data Scientist

8/2020 – 4/2022

Role: Senior SCM / BW consultant / junior data scientist / Lead developer

• APO SNP ticket solving

◦ Error analysis of sporadic occurring errors and fix in customer program for Live Cache analysis
▪ Module, technology used: PPDS, RFC parallel processing, ABAP OO
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◦ Error analysis and fix interactive SNP order release to PPDS
▪ Modules, technology used SNP, PPDS, ABAP OO
▪
◦ IDOC error analysis
▪ Module,technologies used: SNP, ALE, IDOC, ABAP OO
▪
◦ Error analysis wrong forecast consumption
▪ Module ATP, CIF, ABAP OO
▪
◦ Error analysis and fix wrong stock projection SNP forecast
▪ Module, technology used BW, ABAP OO
▪
◦ Performance SNP reporting
▪ Modules, technologies used: BW, ABAP OO, Performance trace

• Scrum Development

◦ APO forecast consumption calculation ( consider forecast if consumption exceeds forecast )
▪ Modules, technologies used: PPDS, gATP, CIF User-exit forecast reduction inbound, ABAP OO

◦ APO macro function “Stock in Transit calculation
▪ Modules , technologies used: SNP, PPDS, ABAP OO

◦ APO macro function “Goods receipts W/O GR Time “
Production orders with continuous I/O and without continuous I/O considered without GR resource activity and mapped into buckets via polygon calculation.
▪ Modules, technologies used: SNP, PPDS, ABAP OO, pair programming, code
review

◦ APO macro function “Blocked Stock”
▪ Modules, technology uses: PPDS, SNP, ABAP OO

◦ APO macro function “Season End Stock”, meta heuristic(Location heuristic, “Season End Stock”)
▪ Modules: SNP, PPDS, ABAP OO

◦ APO master data extractor
▪ Data source 0APO_LPROD_ATTR into Transformations Data Storage Object (DSO)
▪ Transformation
▪ Modules, technologies used: BW, ABAP OO, CDS View, ABAP UNIT, SQL script, Eclipse, Process Chains

◦ ECC ODATA Service : Planned Independent Requirements

Methods: Check if forecast exists, Create Forecast, Deep Create / Update of Schedule Lines
▪ Modules, technologies used: ODATA Services, ABAP OO, BAPI, BOR

◦ Adding new key figures to SNP planning area
▪ Backup Cube, adjustments of transformation and data flow
▪ Modules, technologies used: BW, SNP, Data storage object (DSO), Transformation.


• S4 Hana Migration ECC Masterdata (S4 Hana upgrade has been postponed but the redesign has been finished), role Lead programmer
◦ Code mediation in customer code for Hana compliance
◦ Redesign APO fields enhancements in MM01/MM02
◦ Redesign Master data mass maintenance APO fields + standard fields in FM
MATERIAL_MAINTAIN_DARK
▪ Modules, technologies used: BAPI, Enhancement Frame work, ABAP Unit, CDS Views,

• ML Pilot Transportation Lane Prediction
◦ Analysis of tabular transactional / master data
◦ Feature engineering, data cleansing
◦ Comparison of different classifiers
▪ Random Forest
▪ Neuronal Net (N.N.)
▪ XGBoost
▪ CatBoost
▪ AdaBoost
◦ Frame class for XGBoost classifier and Keras NN
◦ Voting classifier ensemble
▪ Technologies used: Python, Keras, Scikit learn, Pandas, Numpy, Tensorflow, Postman, ABAP OO, CDS Views, Feature engineering, Feature selection, Stratified KFold

• APO Database switch Oracle to Hana

◦ ATC check and code mediation of APO customer code for Database switch Oracle→ Hana
▪ Modules, technologies used: SNP, ABAP OO, ATC

◦ Performance Tuning SNP Reporting
▪ Modules technologies used: BW, SNP, performance traces, ABAP OO, SQL
Info packages ( dynamically created ), auxiliary keyfigures to timeseries keyfigure copy in dynamically created SNP background jobs, dynamic Selection Id creation Ids, dynamic infopackage creation via BAPis, RFC parallelisation, Extraction from planning area, Extraction Business Add In, Planning Book Macro Functions

◦ Prototype of new SNP reporting data flows
▪ Migration 3.1 data flows from SNP planning areas to BW / Hana
▪ Modules, technologies used: BW, Data Storage Objects(DSO), Advanced Data Store Objects (ADSO), Data Transfer Processes(DTP), Eclipse , CDS Views, ABAP OO, Hana SQL script, AMDP, Hana Studio

ABAP OO (ABAP Objects), Python, Random Forest, Representational State Transfer (REST), SAP APO-SNP

3/2019 – 3/2020

• Various Calculation Views SAP Hana 2.0, ADSOs, DTPs
• Integration of Sales and inventory data of external distributors Hana 1.0, BW 7.5
• Calculation View for Goods Movements into a Composite Provider
• Calculation View for Transactions and Goods Movement for reporting into a Composite Provider
• Native Hana Development, Hana Tables, Calculation Views Table Functions, Staging
• Remodelling of the BW Dataflows in APO due to decommissioning of legacy BW system 7.4, Hana 1.0
• DSO Stock Customer Location, Transformations, DTP, ABAP Development for LC Posting, Expert Routines
• Infocube Goods Movements Customer Location, Transformations, DTP, Process Chains, ABAP Development for LC Posting( Reduce In Transit Quantities, Stocks )
• Infocube Sales History, Transormation, DTP , Process Chains
• Process Chains for DP and SNP

SAP ABAP (BC-ABA), SAP APO-DP, SAP APO-SNP, SAP BW, SAP HANA, SAP HANA SQLScript

1/2019 – 4/2019

Role Senior APO/SPP Developer

• Various Developments in SPPABAP OO ABAB Unit for SAP APO Service Parts Planning
• Development of Datamanagers reading and writing, protokoll data, parameter table
• Table maintenance of customer parameter Table with events,
• Initial count report (/SAPAPO/SPP_STO_LOC_CAP_DET), housekeeping report for protokoll data,
• Focal Points: ABAP OO, ABAP Unit, SPP Data Provider, Events in Table Maintenance, Reports

SAP APO

8/2018 – 10/2018

Error Analysis of Realignment Process APO DP / BW

SAP APO-DP, SAP BI

4/2018 – 6/2018

Development of an Future Ordering Tool for Distribution Centers based on F&R Forecast

SAP APO, SAP MM

3/2018 – 7/2018

Intergration of external Exeedra system into SAP Demand Planning

SAP APO-DP, SAP BW

11/2017 – 9/2018

• gATP Enhancements, Rules upload program
• Focal points: Office Integration ABAP OO, rule based gATP BAPIs XML
- Realinement Process BW Analysis

SAP APO-gATP, SAP BW

9/2017 – 10/2017

• PP/DS: avoid scheduling agreement call offs on non-working days
• GATP avoid un-confirmation of sales scheduling lines during backorder processing
• CIF: Transfer of resources capacities avoid zero capacity on consecutive month
• Various changes on complex customer programs.

SAP APO-PP/DS

3/2013 – 3/2017

• Word Class Bearing Planning
Complex customer development in APO PP/DS using
ABAP OO, various PP/DS customer heuristics, Badis, User-Exits and Enhancement Spots and BRF+
• SKF Global ATP
Complex customer development in SAP APO GATP using ABAP OO, GATP Allocation Planning, Badis, Customer Exits and Enhancement Spots and BRF+
• User Interface “Word Class Bearing Planning”
Multi pane customer screen embedded in the Product Planning Table APO using SAP Control frame work.
• Interface development ECC-> APO, APO->ECC, ECC-> Legacy (CIF) (mapping done by BRF+)
• BW Generic extractors APO for Product Data Structures (PDS)
• Entrepreneur model implementation via agency business message SINGLESETTRQS_CREATE IDOC, IDOC, EDI
• Advanced Shipping Notification (ASN), Despatch Advice (DESADV) message to legacy EDI, PI, IDOC
• Post Go Life support

SAP ECC, SAP ALE, SAP APO, SAP APO-PP/DS, SAP ABAP (BC-ABA), SAP BW, SAP IDOC

5/2011 – 3/2013

• EDI development and configuration (MATMAS, ORDERS, DESADV), IDOC, EDI
• PI integration Proxy development inbound and outbound
• Complex reports in R/3 and APO
• Various small developments and fixes in ECC APO HCM, CRM, GTS, SRM
• Database upgrade Oracle to DB2, performance
• Web-UI development in CRM
• Web-Dynpro development in HR
• Workflow development

SAP CRM, SAP ECC, SAP APO, SAP BW, SAP GTS, SAP HR / SAP HCM, SAP MM, SAP PI, SAP WD (Web Dynpro), SAP WF

12/2005 – 5/2011

• APO Icebreaker APU
Modules DP, GATP, EDI, CIF, BI
• APO Daily Replenishment Planning
Modules DP, SNP
• APO Availability Management Facelift
Modules GATP
• APO Dynamic Order Management
Modules GATP, DP
• APO Fine Scheduling
Modules PP/DS
• APO upgrade from Release 4.0 to Release 5.0
all Modules
• APO Capacity Planning
Modules DP/SNP

SAP BusinessObjects (BO), SAP APO-DP, SAP APO-gATP, SAP APO-PP/DS, SAP APO-SNP, SAP MM, SAP SD

8/2003 – 12/2005

• Upgrade of the SAP R/3 system from Release 4.5B to 4.7

Focal points:
Performance tuning of existing reports, re-design of the existing batch management solution, SPAU, SPDD
Modules: MM, WM, SD, EDI, FI, CO, QM

SAP CO, SAP FI, SAP MM, SAP PP, SAP QM, SAP SD

1/2002 – 11/2002

• Roll out of the Modules: MM, SD, WM, FI/CO, QM, PP/DS APO Rel. 3.0

SAP APO, SAP CO, SAP FI, SAP MM, SAP QM, SAP SD, SAP APO-PP/DS

7/2001 – 8/2001

• Post go live-support for Material Management Sales (SD) and Business Intelligence (BI).

SAP BW, SAP SD

10/2000 – 7/2001

• SAP roll out and upgrade of existing SAP solution to SAP R/3 Release 4.0 B

SAP ECC, SAP CO, SAP FI, SAP MM

1/2000 – 6/2000

• SAP roll out and upgrade of existing SAP solution to SAP R/3 Release 4.0 B

SAP CO, SAP FI, SAP MM, SAP PM

5/1997 – 9/1999

• Migration of the Reno Warehouse MVS System into SAP R/3, Release 3.0D
• Implementation of a Sales Information System based on the Logistic
Information System

SAP R/3