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method in LSMW

Former Member
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i know there are 4 methods in LSMW, but can you tell me in which condition we must use each of the method?

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Answers (5)

Answers (5)

Former Member
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Hi,

LSMW is used for migrating data from a legacy system to SAP system, or from one SAP system to another.

Apart from standard batch/direct input and recordings, BAPI and IDocs are available as additional import methods for processing the legacy data.

The LSMW comprises the following main steps:

Read data (legacy data in spreadsheet tables and/or sequential files).

Convert data (from the source into the target format).

Import data (to the database used by the R/3 application.

But, before these steps, you need to perform following steps :

Define source structure : structure of data in the source file.

Define target structure : structure of SAP that receives data.

Field mapping: Mapping between the source and target structure with conversions, if any.

Specify file: location of the source file

Of all the methods used for data migration like BDC, LSMW , Call Transaction which one is used most of the time?

How is the decision made which method should be followed? What is the procedure followed for this analysis?

All the 3 methods are used to migrate data. Selection of these methods depends on the scenario, amount of data need to transfer. LSMW is a ready tool provided by SAP and you have to follow some 17 steps to migrate master data. While in BDCs Session method is the better choice because of some advantages over call transaction. But call transaction is also very useful to do immediate updation of small amout of data. (In call transaction developer has to handle errors).

SO Bottom line is make choice of these methods based of real time requirements.

These methods are chosen completely based on situation you are in. Direct input method is not available for all scenario, else, they are the simplest ones. In batch input method ,you need to do recording for the transaction concerned. Similarly, IDoc, and BAPI are there, and use of these need to be decided based on the requirement.

Try to go through the some material on these four methods, and implement them. You will then have a fair idea about when to use which.

Explain the exact difference between lsmw & bdc.

BDC- It is Batch data communication. Its used for data conversion from legacy system to SAP system. Only technical people can do it. Tcode is SHDB.

LSMW- It is legacy system migration workbench. Its also used for data conversion from legacy system to SAP system. But it is role of functional consultant.

There are 14 steps in LSMW. As soon as you complete the one step, automatically it will go to next step.

In general you can use LSMW. But if you want to transfer more than 40,000 data, then it is not possible in LSMW. That time you can take help of BDC.

Thanks,

Thishya

Former Member
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the question is in what condition you will choose correct method? means that 4 methods, only 1 can be used in one time but how do you choose the method?

Former Member
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Please use the method which is mentioned belaow.

1.Standard LSMW.

2.Standard BAPI/IDOC.

If standards are not avialble please use customized LSMW.

Former Member
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Hi,

LSMW is a tool used to tranfer data from legacy system to R/3 periodically or once.It supports conversion of data and Batch Input,BAPI,IDOC or Direct Input can be used as the method for transfer of data.Total of 26 processing steps are available in LSMW ,In case of data transfer using Batch Input only 14 steps are required.

Execute the transaction LSMW to start transfer of data,Before using the LSMW we should have good knowledge about the business object and the fields that will be transferred.

There are 14 steps that are normally used and these are :

1) Maintain Object Attributes.

2) Maintain Source Structures.

3) Maintain Source Fields.

4) Maintain Structure Relations

5) Maintain Field Mapping and conversion rules .

6) Maintain Fixed Values,translations ,user defined routines.

7) Specify Files .

😎 Assign Files .

9) Read DATA.

10) Display Read Data.

11) Convert Data.

12) Display Converted Data.

13) Create Batch Input Session.

14) Run Batch Input Sesion.

The main advantages of the LSM Workbench:

? Part of R/3 and thus independent of individual platforms

? A variety of technical possibilities of data conversion:

? Data consistency due to standard import techniques:

? Batch input

? Direct input

? BAPIs (Business Application Programming Interfaces)

? IDocs (Intermediate Documents)

The import technique to be used in an individual case depends on the business object.

? Generation of the conversion program on the basis of defined rules

? Clear interactive process guide

? Interface for data in spreadsheet format

? Creation of data migration objects on the basis of recorded transactions

? Charge-free for SAP customers and SAP partners

? Import the data.

Depending on the object type:

? Batch input / recording:

? Generate batch input session.

? Run batch input session.

? Direct input

? Start direct input session.

? IDocs / BAPI:

? Transfer converted data to IDoc inbound processing.

? Check inbound processing.

Hence depending on the object type v use the required method..

Hope it clears ur doubt, sorry for the typo mistake

Plz reward if useful

Regards

Rohini.

Former Member
0 Kudos

Hi,

LSMW is a tool used to tranfer data from legacy system to R/3 periodically or once.It supports conversion of data and Batch Input,BAPI,IDOC or Direct Input can be used as the method for transfer of data.Total of 26 processing steps are available in LSMW ,In case of data transfer using Batch Input only 14 steps are required.

Execute the transaction LSMW to start transfer of data,Before using the LSMW we should have good knowledge about the business object and the fields that will be transferred.

There are 14 steps that are normally used and these are :

1) Maintain Object Attributes.

2) Maintain Source Structures.

3) Maintain Source Fields.

4) Maintain Structure Relations

5) Maintain Field Mapping and conversion rules .

6) Maintain Fixed Values,translations ,user defined routines.

7) Specify Files .

😎 Assign Files .

9) Read DATA.

10) Display Read Data.

11) Convert Data.

12) Display Converted Data.

13) Create Batch Input Session.

14) Run Batch Input Sesion.

The main advantages of the LSM Workbench:

• Part of R/3 and thus independent of individual platforms

• A variety of technical possibilities of data conversion:

• Data consistency due to standard import techniques:

 Batch input

 Direct input

 BAPIs (Business Application Programming Interfaces)

 IDocs (Intermediate Documents)

The import technique to be used in an individual case depends on the business object.

• Generation of the conversion program on the basis of defined rules

• Clear interactive process guide

• Interface for data in spreadsheet format

• Creation of data migration objects on the basis of recorded transactions

• Charge-free for SAP customers and SAP partners

• Import the data.

Depending on the object type:

 Batch input / recording:

• Generate batch input session.

• Run batch input session.

 Direct input

• Start direct input session.

 IDocs / BAPI:

• Transfer converted data to IDoc inbound processing.

• Check inbound processing.

Hence depending on the object type v use the required method..

Hope it clears ur doubt

Plz reward if useful

Regards

Rohini.

Edited by: Rohini Devi on Mar 24, 2008 11:48 AM