loz size procedure 5 :dynamic with Safety stock

[giammaria-pace]

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?

[giammaria-pace]

Hi Girish,

thanks for your respone

unfortunately is not clear

6 subsequent periods (51..56)make 14000 not 9300

thanks

cheers,

GP

[giammaria-pace]

revanchatraban

that's clear.

LsP 5 is dynamic one so you start to calculate only if without considering the procedure there is a Net demand

in period 2 and 3 NT is 150 and project stock is Higher 200 and 300 so conditions are not met.

All this makes sense since you do not want to trigger receipts for lot size procedure if you do not have already that receipt.

[former_member654033]

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]

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