Difference between SNP Heuristics and PP/DS Heuristics

Dear Friends,
I have a basic question regarding Heuristics , is SNP Heuristics and PP/DS Heuristics are same
if not what is the key difference between them
i am very clear about PP/DS heuristics but not sure how heuristics is used for planning in SNP , i am able to read sap help , but could not able to get clear answer
Please help
Thanks & Regards
Raj

Hi Raj,
Heuristics is the simple algorithm which can be attached to any working
module to perform our business requirements.
PPDS Heuristics is used to create procurement proposals for uncovered product requirements
and to carry out planning tasks for products or orders.
This will be used during Production planning run and in interactive planning.
whereas
SNP heuristic is used during capacity levelling and deployment. The SNP Heuristic performs
requirements planning through the entire supply chain network to determine how to satisfy
the customer and/or consumer demand.
SNP heuristic, based on a repair-based planning approach, efficiently plans complex distribution
networks in multi-site production environments.
Regards
R. Senthil Mareeswaran.

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Difference between SNP PDS and PPDS PDS

HI Experts.
Can you tell the major differences between SNP PDS and PPDS PDS.
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Raja kiran R

Hi Raja,
Unlike PPDS planning (time-continuous planning), the least time bucket in SNP planning (bucket oriented planning) is a day, not seconds. Which is why the duration of individual activities in SNP PDS are planned in days only. Scheduling in SNP is based on the fixed duration of an activity and not based on order quantity or capacity load. If a plan contains 3 activities each with fixed duration of 1 day, then the SNP planned order will have duration of 3 days.
On the other hand in PPDS, the duration of an acitivity is calculated based on the resource load that generates the order quanitity, which means larger the qty to be produced, the longer the duration of the activity.
Hope this helps!
Regards,
Umesh

Difference between snp planned order and pp/ds planned order

Hi to all,
can any one please explain the difference between snp planned order and pp/ds planned order. I am relatively new to this area

The primary differences are as below.
1. The master data for SNP Planned Order is SNP PPM/PDS where the minimum duration for an operation is a day. So it is used for rough cut capacity planning.
The master data for PPDS Planned Order is a PPDS PPM/PDS where operations are down to minute and second level. Moreover sequence dependent operation planning is possible in PPDS Planned Orders. It is for detailed capacity planning.
2. SNP Planned Orders are created in SNP while PPDS Planned Orders are created in PPDS or when transferred from ERP to APO.
3. SNP Planned Order need to be converted to a PPDS Planned Order before it can be used in the Execution System (ERP) for further processing - like conversion to Production Order. Moreover the category types of the orders are different in APO (EE for SNP and AI for PPDS).
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Somnath

Difference between Heuristic SAP_SNP_SNGL and SAP_SNP_MULT

Hi,
Please explain me the functional difference between heuristic SAP_SNP_SNGL and SAP_SNP_MULT.
Regards
Syed

Dear Syed,
To convert Supply Network Planning (SNP) orders or Capable-to-Match(CTM) orders into Production Planning and Detailed Scheduling (PP/DS) orders, you use a heuristic based on the algorithm /SAPAPO/HEU_SNP_CONVERT, such as the standard heuristic SAP_SNP_SNGL.
You can implement the heuristic in the production planning run or in interactive planning. If you want to use the functions of the MRP heuristic in the production planning run for a high-performing mass conversion (bundling, parallel processing, and extended log), you call up the conversion heuristic using the MRP heuristic. The heuristic SAP_SNP_MULT is available as a combined standard heuristic.It is an MRP heuristic that calls up the SAP_SNP_SNGL heuristic.
SAP_SNP_MULT is a SNP-PP/DS conversion for many products:
You use this heuristic to perform a mass conversion of Supply Network Planning (SNP) orders into Production Planning and Detailed Scheduling (PP/DS) orders in the production planning run. This heuristic is an MRP heuristic that calls the heuristic SAP_PP_SNGL for the actual conversion.
SAP_SNP_SNGL is used in production planning run for conversoin.However, the conversion takes place with heuristic SAP_SNP_SNGL which is entered in the heuristic SAP_SNP_SNGL customizing.
Please also refer to online for more details on this...
http://help.sap.com/saphelp_scm2007/helpdata/en/c1/147a375f0dbc7fe10000009b38f8cf/frameset.htm
I hope this helps.
Regards,
Tibor

Difference between Plannnig Horizon and Production Horizon

Hai Can somebody explain me the difference between "Planning Horizon and Production Horizon"?
Here is the text that led me to this question:
"If the Production Horizon of SNP is smaller than PP/DS horizon, the planning horizons of SNP and PP/Ds overlap with each other." In this horizon, SNP determines the receipts with most cost effective sources of supply and lot sizes and PP/DS receipts generated by SNP in more detail.

check the following entries in Product master
The SNP production horizon is maintained on the SNP 2 tab page in the product master (transaction /SAPAPO/MAT1).
It also appears in the PPDS tab page along with PPDS horizon
The PPDS Planning horizon and PPDS Production horizon are the same. PPDs only plans inside this Horizon.
What is outside the SNP production Horiozon lies in the SNP planning horizon. Actually thought the name is a bit misleading - SNP does not plan anything inside the production horizon.
If you do not enter a value or you enter the duration 0 for the PP/DS horizon, the system automatically uses the SNP production horizon as the PP/DS horizon during planning. Therefore, the PP/DS horizon is exactly the same length as the SNP production horizon and this means that the SNP and PP/DS planning periods follow on from each other seamlessly and without overlapping.
If the SNP production horizon is smaller than the PP/DS horizon, the planning horizons of SNP and PP/DS overlap. SNP and PP/DS can both use this overlapping period for planning.
A gap between the end of the PP/DS horizon and the start of the SNP planning period is a time segment that is neither planned by PP/DS nor SNP. This can lead to inconsistencies.
So think of two lines - one with its right side shaded(PPDS) and the other with its left side(SNP) shaded. Depending on where you place these lines the shaded sections get planned. how you get the two regions to mesh will ensure the effectivity of your plan
you can also get a better understanding looking at the product view screen and changing the product master values for the horizons and running heuristics

Differece between SNP Optimizer and Deployment Optimizer

Hi,
Can anyone please list down the difference in the planning method for a deployment optimizer and SNP Optimizer?
Thanks & Regards,
Sanjog Mishrikotkar

Hi Sanjog,
First of all if we understand the difference between SNP Heuristic Planning run which finds the 'Source' of Supply with dates and quantities and Deployment Planning run which CONFIRMs the Supply .... then it is easy to understand the difference between SNP & Deployment Optimizer.
The Optimizer as you know Optimizes based on Costs and Objectively tries to MINIMIZE it. Therefore while the SNP Optimizer finds the most cost effective way of finding the Source of Supply with dates and quantities, identifying where in SC it is better to Store or move the Product, while the Deployment Optimizer generates the Best way to CONFIRM whether the Supply can ACTUALLY be done for the next few days. Deployment precedes the TLB Run which after confirmation we put the Quantities on a Transport Load to build Orders for Execution (Shipping).
Both are Cost based & use the Same Costs Information ... however one Plans and the Other Confirms. During Deployment Optimization run, the Optimizer may decide to confirm the supply from a different source than what the SNP Optimizer planned based on the Available to Deploy Stock Quanties and the Cost of Confirming the Supply. The Deployment Optimizer will apply Fairshare & Push/Pull Rules and looks at the Push and Pull Deployment Horizons which SNP Optimizer cannot. The Difference is also in Planning Time Range. You plan SNP Supply for mid to long term time range. The Deployment looks at Confirming the supply in the next few days from TODAY.
So in short first understand the Difference between a SNP Heuristic and Deployment Heuristic and apply the same principle to a cost based optimization. This should tell you the difference between the two.
Try read this ... First para on Deployment Optimizer ...
http://help.sap.com/saphelp_scm50/helpdata/en/1c/4d7a375f0dbc7fe10000009b38f8cf/frameset.htm
Read the First Paragragraph as well as 'Distribution based on Lowest Costs' section
Hope you find this answer usefull. Reward Points if it is.
Regards,
Ambrish Mathur

Difference between Bucket capacity and Time continuous capacity

Can somebody explain the difference in functionality between "Bucket capacity" and "Time continuous capacity" as used in field "Finite capacity" in "PP/DS bucket capacity" tab in Resource?
How will above above two settings work when you have "Block planning" in "Bucket definition" tab in same tab?
Thanks,
Srini

Hello,
The difference between Bucket capacity and Time continuous capacity are:
Time continuous capacity is basically the capacity which is infinite continuous duration in time and you can define the shift intervals and breaks to adjust as per business process e.g. everyday 8 hrs or 16 hrs capacity with lunch time and breaks in between whereas bucket capacity is a discrete capacity and is specified bucket wise. Bucket capacity can be in PPDS as well as SNP. In PPDS it is used specifically for CDP planning or block planning. In SNP it can be used for bucket capacity references as Transport resources, storage resources , bucket planning etc
With respect to Block Planning:
You maintain the blocks using the entire validity of the available capacity of the resource. If you defined buckets from block planning for validity periods in which no blocks are defined, the buckets correspond to technical intervals in which the system schedules on a time-continuous basis.
You can check out the below link for the Block planning with Bucket capacity:
http://help.sap.com/saphelp_scm41/helpdata/en/e5/90bb3b6070bf38e10000000a11402f/content.htm
Hope the information is useful
Regards

What is difference between sy-tabix and sy-index.

SAP Seniors,
Can you please let me know what is difference between sy-index and sy-tabix.
I read the SAP help, it is confusing for me. it looks like both are same from help. please help me.
Thank you
Anitha.

HI,
Here is a brief description of difference between SY_TABIX and SY_INDEX and using them with several conditions.
SY-TABIX
Current line of an internal table. SY-TABIX is set by the statements below, but only for index tables. The field is either not set or is set to 0 for hashed tables.
APPEND sets SY-TABIX to the index of the last line of the table, that is, it contains the overall number of entries in the table.
COLLECT sets SY-TABIX to the index of the existing or inserted line in the table. If the table has the type HASHED TABLE, SY-TABIX is set to 0.
LOOP AT sets SY-TABIX to the index of the current line at the beginning of each loop lass. At the end of the loop, SY-TABIX is reset to the value that it had before entering the loop. It is set to 0 if the table has the type HASHED TABLE.
READ TABLE sets SY-TABIX to the index of the table line read. If you use a binary search, and the system does not find a line, SY-TABIX contains the total number of lines, or one more than the total number of lines. SY-INDEX is undefined if a linear search fails to return an entry.
SEARCH <itab> FOR sets SY-TABIX to the index of the table line in which the search string is found.
SY-INDEX
In a DO or WHILE loop, SY-INDEX contains the number of loop passes including the current pass.
Hope this helps.
Thank you,
Pavan.

Difference between sy-tabix and sy-index?

tell me about sy-tabix and sy-index?what is the difference between sy-tabix and sy-index?
Moderator Message: Please search before posting. Read the [Forum Rules Of Engagement |https://wiki.sdn.sap.com/wiki/display/HOME/RulesofEngagement] for further details.
Edited by: Suhas Saha on Jun 18, 2011 5:33 PM

HI,
Here is a brief description of difference between SY_TABIX and SY_INDEX and using them with several conditions.
SY-TABIX
Current line of an internal table. SY-TABIX is set by the statements below, but only for index tables. The field is either not set or is set to 0 for hashed tables.
APPEND sets SY-TABIX to the index of the last line of the table, that is, it contains the overall number of entries in the table.
COLLECT sets SY-TABIX to the index of the existing or inserted line in the table. If the table has the type HASHED TABLE, SY-TABIX is set to 0.
LOOP AT sets SY-TABIX to the index of the current line at the beginning of each loop lass. At the end of the loop, SY-TABIX is reset to the value that it had before entering the loop. It is set to 0 if the table has the type HASHED TABLE.
READ TABLE sets SY-TABIX to the index of the table line read. If you use a binary search, and the system does not find a line, SY-TABIX contains the total number of lines, or one more than the total number of lines. SY-INDEX is undefined if a linear search fails to return an entry.
SEARCH <itab> FOR sets SY-TABIX to the index of the table line in which the search string is found.
SY-INDEX
In a DO or WHILE loop, SY-INDEX contains the number of loop passes including the current pass.
Hope this helps.
Thank you,
Pavan.

What is difference between sy-index and sy-tabix and where both are using ?

what is difference between sy-index and sy-tabix and where both are using ?

hi nagaraju
sy-tabix is in Internal table, current line index. So it can only be used while looping at the internal table.
sy-index is in Loops, number of current pass. This you can use in other loop statements also (like do-enddo loop, while-endwhile)
SY-INDEX is a counter for following loops: do...enddo, while..endwhile
SY-TABIX is a counter for LOOP...ENDLOOP, READ TABLE...
Here is an example from which you can understand the difference between sy-tabix and sy-index.
Itab is an internal table with the following data in it.
id Name
198 XYZ
475 ABC
545 PQR.
loop at itab where id > 300.
write :/ itab-id, itab-name , sy-tabix, sy-index.
endloop.
My output will be :
475 ABC 2 1
545 PQR 3 2
Sy-tabix is the index of the record in internal table.
sy-index gives the no of times of loop passes.
So, for the first record in the output (475 ABC), 2 is the index of the record in internal table and as it is first time loop pass occured, sy-index value is 1.
Regards,
navjot
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I have one query regarding DATE I wanna calculate the difference between
SY-DATUM and ANY GIVEN DATE . Is there any function or code available that take one parameter as sy-datum and another parameter as any given date and give result as no. of days between them
Regards;
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DATA: DATEDIFF TYPE P.
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Difference between SNP Heuristics and PP/DS Heuristics

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