For our crude oil conversion group, the S&W % value increases the product mass and weight instead of decreasing it. How can this be?

Example:

Enter a transaction quantity of 10 000 m³ (SAP UoM M3):

Apparently, the gross ton value (UoM GT) is lager than expected, also the net ton (UoM TO) and the gross and net weights (UoM GTA and TOA) for a S&W fraction of 0.1 %. How can this be?

Answer: For S&W calculations, it is important to select the correct UoM for gross observed or gross standard volumes (GOV, GSV), which are typically the transaction quantities. By design, M3 is a NOV (Net Observed Volume) UoM. Thus, the calculation is performed “backwards” to correctly calculate the additional quantity values for all UoM.

QuantityWare MQCI S&W conversion groups require a transaction UoM of SAP dimension ID (DIMID) gross volume (GRSVOL) for GOV transaction quantities:

Thus, if you select a gross observed volume UoM (MG3: m³, gross), the calculation is as expected:

Related FAQ: Gross and Net Volume Calculations.

The American Petroleum Institute (API) defines the following quantities, which are mapped to a distinct SAP Dimension ID (DIMID) – API MPMS Chapter 12.1.1:

• GOV – gross observed volume <-> SAP DIMID GRSVOL, All UoM w/o standard temperature assigned

• GSV – gross standard volume <-> SAP DIMID GRSVOL, All UoM with standard temperature assigned

• NOV – net observed volume <-> SAP DIMID VOLUME, All UoM w/o standard temperature assigned

• NSV – net standard volume <-> SAP DIMID VOLUME, All UoM with standard temperature assigned

• GSW – gross standard weight <-> SAP DIMID GWGHTA, All UoM

• NSW – net standard weight <-> SAP DIMID WGHTA, All UoM

• GSM – gross standard mass <-> SAP DIMID GMASS, All UoM

• NSM – net standard mass <-> SAP DIMID MASS, All UoM

• Note: In legacy systems, one may define UoM of SAP DIMID MASS to be net standard weights.

Read the BCS 3.0 CSP01 Release Notes, section “Support of API MPMS Chapter 12 -S&W Corrections -Gross Standard Masses and Weights (GSM/GSW) and Net Standard Masses and Weights (NSM/NSW)-Parallel Calculations” for additional details.

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