BCG & BCP Configuration FAQs
Answers to common questions regarding configuring bulk calculations for LPG / NGL products on your systems
How are the two reading group indicators defined, that control the LPG vapor space calculations?
LPG quantity conversions support two vapor space scenarios. For each scenario, one indicator is relevant.
Scenario A: You perform an opening and a closing dip measurement (e.g. for a loading process shore-to-ship) to determine the transferred mass of LPG (e.g. by using SAP Tank Management and implementing your delta calculation logic in a SAP Tank Management BAdI):
Summary: In this scenario, you perform two calculations (opening and closing dip calculation) with the “Apply vapor corr. (tank dip)” indicator set. The transferred mass is calculated by subtraction.
I receive error message /QTYW/QCI091: Liquid LPG volume is negative; tank almost empty, correct measurements - why is that?
For LNG, NGL and LPG, you may require vapor space calculations. You utilize the static tank dip measurement indicator, such that the vapor mass (and possibly weight and energy) is calculated and added to the total mass (and possibly corresponding total weight and total energy):
Example:
You measure 1 000 m³ of liquid product being in your tank; but you do not apply the vapor space calculation:
The mass of the liquid is thus calculated to be 532 741.428 kg.
Now you set the vapor space indicator and perform a second calculation:
The total mass is now calculated to be 542 391.656 kg,
Our LPG conversion group does not allow entry of a test temperature to correct the LPG density to base. How can we solve this requirement?
Many of the MQCI LPG Q7** template conversion groups (as well as many crude oil and product Q2**/ Q1** and some linear DCF conversion groups, e.g. Q0A9) are configured such that the product base density (in vacuo or for DCF calculations – in air) can be entered directly without a need to enter a second so-called test temperature to correct a test density to base. This is described in more detail in the BCP Reference Manual, Chapter 6.10.
Example:
If required, you can extend your LPG reading group and add the test temperature (technical name OBSTSTMETT) and then also change the name of the input parameter OBSTSTDENS from base density to e.g.
My rounding settings for the density values for an MQCI conversion group are not considered for the calculation. How can I fix this?
You have copied e.g. template conversion group Q1A1 to Z1A1. For the density UoM PPG (pounds per gallon – lb/ugl) you have maintained a rounding to 4 decimals; business requires that the rounded value is utilized for the calculation of masses.
A simple test calculation with Q1A1 shows the issue: The expected value for UoM LB is 620 540.00 LB; however, the value is calculated using the non-rounded density (while the rounded value is displayed):
This is due to the fact, that the density rounding function /QTYW/MQCI_ROUND_DENSITIES_UOM is processed after the quantity conversion model function /QTYW/MPMS_OBS_TO_ALT_QUAN:
If you position the rounding function before the quantity conversion model function:
the calculation is happening as expected:
The Q*** template conversion groups are configured to round the density values for reporting purposes,
We do not require the hydrometer correction. Can we remove it from our conversion group configuration?
Yes.
The hydrometer correction may only be required, if you enter an observed density that is determined with a glass hydrometer. If you utilize an ASTM D1250-04 implementation, you may simply remove the hydrometer function (and also remove the hydrometer indicator from the reading group):
ASTM D1250-80 implementations contain a built-in (by measurement standard definition) hydrometer correction logic, which requires that you actively turn the correction off if it is not required – read note 000026 for all important details.
My client wants to use MQCI conversion groups, where UoM KG, LB, TO, STO ... are calculated as weights - is this possible?
Yes.
The BCS configuration template provides example MQCI conversion groups that are configured such that UoM of SAP dimension ID MASS are calculated as weights (which is also the case for SAP QCI conversion groups if the air buoyancy indicator is set).
Example – BCP template conversion group Q214:
The LB value is the weight of the 10 000 gallons of product. The configuration to achieve this requires 2 (plus 1) steps:
Step 1:
You assign the SAP Dimension IDs for weight (and mass) DIMID:
Step 2:
You assign marker function /QTYW/MQCI_WEIGHT_MASS to the MQCI model function sequence:
Step 3:
Depending on the MQCI calculation model,
My customer requires ASTM Table 1 UoM conversion factors. What are the configuration steps?
For MQCI conversion groups, you simply activate the ASTM Table 1 conversion factors and ASTM Table 1 version in the conversion group detail settings:
With the QuantityWare BCS configuration templates, ASTM Table 1 conversion factors are delivered, which are accessible in your client 045 after activation of the relevant Business Configuration (BC) set. Read Note 000055 for all important additional configuration details.
What is MQCI function /QTYW/MQCI_SYNC_EXT_VALUES good for?
All QuantityWare MQCI template conversion groups are configured such that the MQCI function module sequence contains function
- /QTYW/MQCI_SYNC_EXT_VALUES
as default.
This function detects quantity value data that is passed from external systems (e.g. TAS systems) and subsequently synchronizes dependent quantity values based on that data.
This synchronization – i.e., keeping related quantity values consistent – is an important part of the two main roles that QuantityWare BCS fulfills: The “Gatekeeper” and the “Enricher” role.
Synchronization example 1:
- Transaction quantity is 1001 Liters (L)
- Internally,
