SAPDataMigrationStrategyandMethod数据迁移策略和方法_SAPDATAMIGRATION

Data

Migration

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2019/12/13 SAP Data Migration Methodology | SAP Blogs

https://blogs.sap.com/2013/04/16/sap-data-migration-methodology/ 1/19

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Goal of this document

This document provides you with a procedure to assist you organizing and performing the data transfer

from the legacy system.

It describes a methodology for data migraon I used successfully in diﬀerent implementaons. It is based

upon my previous experiences. There is no warranty on its content or on the results. This guide gives you

suggesons. It is up to you to take the hints and make up your own methodology.

Common Terminology and Abbreviaons in Migraon Projects:

Note: The terms SAP and R/3 are both use interchangeably to refer to SAP R/3 system.

Big Five: When referring to the Big Five, it means Material Master, Customer Master, Vendor Master, Bill Of

Materials (BOM) and Roungs.

Business Objects: To help in the analysis and transfer process, the data are not treated as tables or ﬁeld

contents but rather as objects in term of business operaonal. These are called Business Objects.

Johnpaul Joseph

April 16, 2013 14 minute read

SAP Data Migration Methodology

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2019/12/13 SAP Data Migration Methodology | SAP Blogs

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Business Object DC responsible: Responsible of the conversion process (Legacy data source and integrity,

mapping, conversion rules, etc.) and for the respect of the planned schedule for his Business Object.

Business Object Owner: The one that owns the informaon in the everyday business. This is the person

that will make the strategic choices on funconal requirements for the business object and that will do the

ﬁnal validaon of the converted data. Can be idenﬁed by ﬁnding “The highest hierarchical person who will

be directly and mostly aﬀected if the business object does not work”

Data Conversion & Data Migraon: The data conversion process. “Data conversion” and “Data Migraon”

terms are used interchangeably in the document.

DC: Abbreviaon for the data conversion process.

Domain: Funconal domain within the project, like Finance, Sales, Producon, etc.

Flat File: A ﬁle format used to import data into SAP. The ﬂat ﬁle is a plain text ﬁle with a tab separator

between ﬁelds. It can be easily generated from Excel or Access.

Intermediate ﬁle: An Excel, Access or other type of ﬁle, which is manually manipulated in a process

between the LS extracon and the ﬂat ﬁle generaon.

LSMW: Legacy System Migraon Workbench. It is a SAP tool for conversion that permits data loading using

ﬂat ﬁles extracted from the Legacy System.

Cross reference table or X-Ref table: A table that shows the relaon between ﬁelds when one value is

related to a parent ﬁeld. For example, the “Sales Organizaon” will be set accordingly to the material type.

WBS: Work Breakdown Structure.

Overview:

Implemenng SAP is an important challenge, both in terms of resources (people, money, me) and in

business process. A lot is at stake and, for most of you, failure is not an opon you can aﬀord. To put all

odds on your side, you need a good methodology. One that will provide you with a realisc planning, a

solid organizaon, a way to manage the process and control tools to detect and correct slippage before it

becomes a problem.

Main steps of the conversion methodology:

Before you even start to work on specs, you must ﬁrst get organized. Geng a good planning and

organizaon structure take about two weeks for the ﬁrst dra, which will leave you with some quesons

on project organizaon. Geng a complete and ﬁnal planning will take at least one more week. Any

2019/12/13 SAP Data Migration Methodology | SAP Blogs

https://blogs.sap.com/2013/04/16/sap-data-migration-methodology/ 3/19

unsolved issues on these will haunt you throughout the project, so ﬁnish this completely before stang any

other step.

The data conversion requires funconal and technical resources from most departments. These same

resources will most probably be involved in other part of the project. For this reason, the risk of conﬂicng

task is high and can quickly lead to a boleneck where key peoples are overloaded. For this reason, you

should consider the data conversion as a project within the project. This translates into the preparaon of a

complete conversion plan that will help you go through the process and will permit to foresee and solve

the conﬂicng resources usage before the boleneck ever occurs.

The main steps of the data conversion are:

Organizaon of the data conversion (Project manager & data conversion coordinator)

Data conversion plan

The WBS with workload esmates

The calendar planning with resources loading

Going on with the Business Objects data conversion (The resource responsible of the Business Object DC)

Data Purging and Cleansing

Mapping and conversion rules

Extract and Load Programs from rules

Data and Rules Adaptaon (adjusng rules and programs following tesng)

Load Unit Tesng (unitary tesng – small volume of manual data)

Extract and Load Full size tesng (data test and validaon – large volume with real extracted data)

Full data loading into ACCEPTANCE SYSTEM

Full data loading into PRE PRODUCTION SYSTEM

Validaon of converted data and Key User + Business Objects Owner Signoﬀ

Full conversion into PRODUCTION SYSTEM and ﬁnal Signoﬀ

Data Conversion Plan

Business Objects

A Business object is a general category for data that deﬁnes something like material master, vendor master,

stocks, orders, purchase requisions or organizaonal units. The ﬁrst step is idenfying which business

objects (Objects) are required in your SAP implementaon.

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