MFBF Back flush

[Former Member]

Hi,

Can anybody explain me what is assembly backflush, component backflush and activity backflush? and which radio button we should use and when?

Jayesh

[Former Member · Accepted solution]

Hello Jayesh,

Using the tab pages in the lower section of the screen, you can choose the different production types.

You cannot choose the component and activity backflushes for make-to-order production and production by lot. Therefore, the selection buttons remain gray.

If you want to post scrap for assemblies, components or activities, choose the switch button, Scrap.

If you want to carry out a reporting point backflush, select the reporting point backflush option and enter a reporting point. If you do not select the reporting point option, the Reporting point field remains gray.

You can use transaction variants to create your own customized backflushing screen. You can use this option to hide fields and to create a more limited, simpler screen. You can load and assign the transaction variants created by your system administration by choosing Backflush ® Transaction variant.

Some useful links

Creating Backflush:http://help.sap.com/saphelp_rc10/helpdata/en/a7/dda23853dda86ae10000009b38f8cf/content.htm

Activities of backflush:http://help.sap.com/saphelp_470/helpdata/en/2b/93db3b0f5011d3bc3e00105ab03aee/content.htm

Hope the information was useful

Regards,

[Former Member]

Thanks

[former_member184655]

Dear Jayesh,

In a REM scenario normally assembly backflush is always used.You have to manually choose the other radio button for

component backflush and activity backflush.

1. Assembly backflush - GR(131) & GI(261) & activities will get posted (If in REM profile check box for

post activities is included means) and a material document will be generated.This is the normal

backflush used for production confirmation.

2. Component backflush - Only 261 movement for the component's will be taking place and a material

document will be generated and no GR or no activities will be posted.This will be used for posting extra

consumption of component's than the planned one.

3.Activity backflush - to post the activties alone for an input quantity(for the extra activities spent for production).

Check and revert back.

Regards

Mangalraj.S

[Former Member]

Hi

Activity back flush:

Use:

In make-to-stock repetitive manufacturing, the system posts the material costs to the product cost collector in the final backflush.

Depending on the settings in Customizing, the system also automatically posts the planned production activities from the cost estimate to the product cost collector. If the actual production activities vary from the planned production activities, you can also enter the actual activities (actual times) in the final backflush.

Prerequisites:

Customizing:

You must create a repetitive manufacturing profile which allows the creation of actual activities. To do this, you select Post activities in the Cost accounting section of the repetitive manufacturing profile. You can also choose whether you want to backflush using the data from the standard cost estimate for the material (multi-version) or using the data from the preliminary costing (version specific).

Work centers:

You must create a work center or a line hierarchy for the production line.

Here, in the Basic data tab page, you must enter a standard value key which determines the composition of the various standard values, for example, for the setup time, the machine time or the teardown time.

In the Cost centers tab page for the work centers, you must enter the cost center and assign the activity types to the standard values.

Routing:

You must assign a control key that allows backflushing and cost estimation to each operation in the routing. To do this, select Cost estimate in the control key and enter an indicator which allows backflushing in the Backflush field.

Material master:

In the MRP data for the material, you must enter the repetitive manufacturing profile you defined above.

In the MRP data for the material, you must also create a production version containing the work center and the routing.

You must select a repetitive manufacturing profile for the material that allows activities to be posted to a product cost collector.

You must create a product cost collector.

In the repetitive manufacturing profile, depending on your settings, you must carry out a standard cost estimate for the material or a cost estimate for the production version. You have to flag and release the standard cost estimate.

Or alternatively, in the initial screen for backflushing, you must select the activity posting by choosing Details.

Features:

The posting of production activities is optional. The system calculates the production activities using the standard cost estimate for the material or the preliminary cost estimate for the product cost collector. When posting activities, the system uses the routing valid at the time of the cost estimate. When creating the cost estimate, the system creates a copy of the routing which it uses to determine the production activities.

If the actual times differ from the planned times in the routing, you can also backflush these times. (For more information, see Correcting Activities.)

Execution:

Use

If more (or less) activities are used to produce a material than you posted, you can use this function to repost the excess (or reduced) activities.

It may be necessary to do this if a difference exists after backflushing the planned and actual activities. These differences have to be balanced.

Procedure

Starting from the initial screen for backflushing, choose Activity backflush.

The system displays the screen for backflushing activities.

Enter the appropriate plant and the assembly for which you want to backflush activities. If necessary, restrict your selection further.

In the Reference quantity field , enter "0".

This allows you to differentiate between posting a balance and posting a complete activity. When posting the complete activity, enter the appropriate reference quantity here.

Choose Continue.

The system proposes the operations, for which you can post a balance.

Select the appropriate operations and confirm with Enter.

Now enter the excess or reduced activities and save.

I hope above three posts will help you understanding the concept and when to use it exactly.

Regards,

Madhu.G

[Former Member]

Hi Jayesh Narvankar,

b) Component back flush :

Use:

You can use the component back flush (also goods issue back flush) to carry out the following business functions:

Posting excess component consumption / scrap.

Processing the component back flush subsequently if, in the Repetitive Manufacturing Profile, you have separated the goods receipt and the goods issue postings using the indicator GR and GI.

Integration

Using the component or activity back flush, you can post components or activities separately.

The separated component and activity back flush is only possible with make-to-stock repetitive manufacturing.

If you want to back flush finished products and, at the same time, components and activities, switch to the assembly back flush.

Prerequisites:

You must create a product cost collector.

Features:

The following functions are included in the standard version of the goods issue back flush:

The system posts the goods issue.

The system determines the components by exploding the current BOM, the revision level BOM, or the planned order BOM.

The system reduces the planned orders or the run schedule quantities according to the logic set in Customizing for Repetitive Manufacturing.

The system updates the statistics for the Logistics Information System (LIS).

The system creates individual documents for each posting as well as a full document

Execution:

Use

Using the component backflush, you can backflush component scrap or excess component consumption in Repetitive Manufacturing.

A separate movement type is provided for the scrap backflush so that you can also define a separate cost element in Controlling. In Controlling, however, backflushed scrap is interpreted as excess consumption.

Procedure

In the REM Backflush screen, choose Component backflush.

Enter the appropriate plant and the assembly for which you want to backflush the components. If necessary, specify the selection criteria according to which the BOM is to be exploded.

If you want to enter the components manually, choose No BOM explosion. Then you can enter the scrap quantities individually by selecting Process component list.

If you want the system to propose the components via the BOM, choose Propose components acc. to BOM. You can now propose a reference quantity which the system uses to explode the BOM. If you do not enter a reference quantity, the system posts the planned quantities.

If you only want to backflush component withdrawals for one specific reporting point, select the reporting point backflush and enter the appropriate reporting point.

If you want to backflush goods issues for operations which were processed after the last reporting point in the routing, choose Comps after last RP.

If you enter a reference quantity, the system explodes the BOM using this quantity and automatically calculates the component quantities.

If you enter no reference quantity, you must enter the scrap quantities manually in the next screen.

In this way, you can post scrap for individual components. You do this, for example, when only a part of the assembly is to be posted as scrap and not the complete assembly.

Choose Execute.

Result

The system posts the scrap and confirms the posting with an appropriate message.

I hope it helps you

Regards,

Madhu.G

[Former Member]

Hi Jayesh Narvankar,

Well Back flush is used for repetitive manufacturing mainly OK.

3 types are there:

a) Assembly back flush, Component back flush, Activity back flush OK.

a) Assembly back flush :

When you select the assembly back flush radio button we can do it in for three types:

1) MTO 2) MTS 3) production b lot size procedure OK.

Use

You can use the assembly backflush to carry out the following backflushes:

The final backflush for finished products.

You can backflush the excess component consumption / scrap or activities.

Integration

The assembly backflush is the most extensive backflushing transaction available as here components and activities are also posted automatically. You still have the option of correcting components and activities manually.

You can use the assembly backflush for make-to-stock production, make-to-order production and also for production by lots.

If you want to separate the posting of components or activities you required in make-to-stock production, switch to the component or the activity backflush.

Prerequisites

You must create a production version and a product cost collector.

Features

The following functions are included in the standard version of the final backflush:

The system posts the goods issue.

The system determines the components by exploding the current BOM, the revision level BOM, or the planned order BOM.

The system backflushes the goods issue for the calculated component quantity.

If the actual production data differs from the data in the routing or in the BOM, you can post the actual data.

The system reduces the planned orders or the run schedule quantities according to the logic set in Customizing for Repetitive Manufacturing.

The system updates the statistics for the Logistics Information System (LIS).

The system creates individual documents for each posting as well as a full document.