1404   RATE statistical method is not fully defined and may lead to Interop issues

Created: 06 Jun 2015

Status: In Force (green)

Part: Part 7-4 (2010; Edition 2)

Links:

Page: 125

Clause: ClcMth

Paragraph:

Category: Issue for edition 2 of this part

Issue

Following the latest TC57 WG10 Regina meeting, and the assessment of the requirement to support the coming 90-3 TR, it appears that the proposed RATE calculation method for statistics is possibly raising issues :
- Basically a measurement issued from a RATE calculation unit shall have a different unit than the original one (from xxx, to xxx/T)
- It may then raise additional interop issue because the same object from the same LN Class may be expressed with different units (said optional)

Proposal

Depecrate RATE statistical method as [F(t+T) -F(t)] /T

Introduce a new statistical method DIFF expressing for a calculation interval T, the entity [F(t+T) -F(t)] (in the de facto same unit than the original entity).
Actually, because T is also readable, calculating the previous RATE is still possible by the client, from the DIFF result : RATE = DIFF/T

Discussion Created Status
Change to green 16 Sep 15 In Force (green)
The enum value PREDICTION will also be deprecated. A more general concept of forecast modeling will be developed (probably in WG17).

The tissue will be changed to final proposal. 		22 Jul 15 Ballot Period
Applicable for next revision of the standard (data model name space 2007B) 07 Jul 15 Ballot Period
Please confirm this is applicable for the "next revision" of the standard (data model name space 2007B) 07 Jul 15 Ballot Period
Change to final proposal. 06 Jul 15 Ballot Period
Correction: EnumVal=11 is already used. For ClcMth DIFF shall be EnumVal=13. 11 Jun 15 Discussion (red)
The issue is valid. Therefore the enum value RATE of ClcMth shall be set to deprecated in amendment 2.1.
Instead the method DIFF (as proposed) will be invited in the enum list of ClcMth with EnumVal=11 of part 7-4 amd 2.1. 		11 Jun 15 Discussion (red)

 

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