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loz size procedure 5 :dynamic with Safety stock

giammaria-pace
Participant
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385

Hi Experts

my understanding is that

  1. calculation is triggered only if there is a standard Net Demand (without lot size procedure)>0 (core of Dynamic lot size procedure)
  2. we create a a new concept of Safety stock named SS* covering the span defined CP* from SUBPERIODSOFSUPPLYSAFESTOCK (6,5,4 in my case)

2.1)SS* is calculated via a local formula (row 33,33,34)

3.we perform a normal dynamic lot size procedure in period T (50) always using

3.1)normal coverage span CP defined by SUBPERIODSOFSUPPLY (2 for period T)-->output Additional Lot size (row 25)+

3.2)using SS* instead of SS -->output(row 34)+

3.3)standard dependent demand of the period -->output(row 17)+

3.4)standard independent demand of the period -->output(row 18)+

3.5)projected stock(t-1)-->output(row 24 of (t-1))-

result-of-losizeproc-5.png

In my case the should be

ND =Additional Lot size (4700)+ SS*(14000)+ DD (100) + ID(0)- ProjStock[t-1](100) resulting in 18700

but I have 14000 .Why?

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former_member654033
Contributor
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Hi,

IBP Calculation is correct because demand horizon do not overlap each other, their calculation is sequencial for demand horizon

For W50 there will 2 calculation

1. 2 Periods will SUM demand from W51+52 = 4700

2. 6 Periods will SUM Demand from W1+W2+W3+W4+W5+W6 = 9300

So total 4700+ 9300 = 14000.

Thanks

Girish

revanchatraban
Participant
0 Kudos

Hi Girish,

The calculation about lot size procedure 5 seems very confusing even in the below SAP Help Portal Link.

https://help.sap.com/viewer/feae3cea3cc549aaa9d9de7d363a83e6/2108/en-US/a0e21aa575d54baba659416e9860...

In the example provided in the link, there is no net demand in period 2 and 3. I don't understand the logic why there is not net demand.

I suspect the usage of supply algorithm other than Infinite Heuristic.

Thanks and Regards,

Revan C