Rolling schedules for steel options between SNP and PPDS

[former_member584840]

We are trying to set up something within the APO SNP/PPDS tool to

plan rolling schedules for steel.

eg multiple resources, most of which are 100 percent rolling schedules,

with many different "blocks", and common rolls may occur say every 4 weeks, or

every 14 weeks.

And so each roll we need to plan "Quantity required before the next roll" - eg

a 14 week quantity.

We have set up PPDS Blocks using CDP settings with characteristics in our

test system.

Seperate to that we have an SNP model where we plan across multiple plants,

for a 12-24 month period, and we have multiple level BOMS where there may

be 2 semi-finished products between the Finished and Raw material. Eg heat

treated and non-heat treated.

Sometimes one of the interim semi-finished products is the bottleneck, so we

need to use capacity leveling to reduce quantities at all levels of the BOM.

Our main issue is that the SNP quantities that we plan, we are not able to feed into

the PPDS blocks, as SNP does not deal with characteristics.

So in our test, all we can do is use the SNP quantities for higher level plans.

Then delete the SNP orders, and re-run a new PPDS plan to get quantities in our blocks,

but we then have lost all the capacity levelling information from SNP.

Does anyone have any method to deal with this scenario? ie how to model rolling schedules

by utilising the strengths of the SNP mult-plant and capacity leveling data, and then

somehow also taking into account "blocks", or "rolling schedules"?

[m_manimaran]

Hi,

Could you please elaborate on "SNP does not deal with characteristics."? As per my knowledge, even SNP will plan characteristics. Then we can download this SNP block into Resource for PPDS planning.

Regards,

Manimaran M.

Edited by: M Manimaran on Aug 24, 2011 10:41 AM

[former_member584840]

In our testing. With CDP setting, we create a fcst element with a characteristic on the material. eg RED/BLUE/GREEN, and in PPDS, I can then create a PPDS order with the characterstic linked and visible in the PPDS order, and linked to the BLOCK on the resource (Blocks of RED GREEN for example)

But SNP orders do not work with these characteristics.

This is backed up by various documentation from SAP.

eg

http://help.sap.com/saphelp_scm50/helpdata/en/b0/3c2463c7cbb54bacfb75c789100ad4/content.htm

SNP cannot plan with characteristics. However, the characteristic assignments remain and can be evaluated in PP/DS.

CDP cannot be used in SNP as the SNP does __not support__ characteristics.

http://books.google.com.au/books?id=KjvOY_4P8JEC&pg=PA13&lpg=PA13&dq=CDPSNPcharacteristics&source=bl&ots=tG9-FGeIo9&sig=CzW-hktRFP2DrlOaied2QMY7gNE&hl=en#v=onepage&q=CDP%20SNP%20characteristics&f=false

(In this book - a list of which APO areas do and do not work with Characteristics. SNP does not)

[m_manimaran]

Hi,

Thanks for your detailed answer.

I think this is available from SCM7.0. Which version are you working?

Please refer

http://help.sap.com/saphelp_scm70/helpdata/EN/46/19c8308716424fe10000000a1553f6/frameset.htm

You can plan the blocks in SNP optimizer and download them to PPDS block planning. Please see in SPRO >APO> Supply Chain Planning -->SNP -->Maintain Global SNP Settings

Have you activated SNP Block Calculation?

The F1 help of the 'SNP Block Calculation' reads as below,

"

Specifies whether the system generates suggestions for block planning in production planning and detailed scheduling (PP/DS) as part of optimization-based planning in Supply Network Planning (SNP)

The suggestions are displayed in interactive SNP planning and in the results log of the optimization. You can load them during block planning in PP/DS

"

This will create SNP blocks, which can be downloaded to PPDS blocks directly.

Please see if it helps you.

Regards,

Manimaran M.

Edited by: M Manimaran on Aug 25, 2011 7:34 AM

[former_member584840]

Hi MM, yes I initially thought that this would help, and I have looked at this in detail, but it is actually about creating "block sizes and start and end times" using the SNP optimizer to help plan out "the best theoretical sequence of blocks for the year ahead", so it does not help actually processing the month by month QUANTITY data.

As we already have our block dates set up, we do not need this functionality in the medium term. We just need a way to get the QUANTITIES that we have worked on in SNP - eg by using the capacity levelling, into the blocks that we already know the dates of and have published to the customers.