Aquarius 3: Financial model - Draft determination version

Aquarius 3: Financial model - Draft determination version - letter to RDs

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Letter to named RDs

22 July 2004

Dear

AQUARIUS 3 FINANCIAL MODEL – DRAFT DETERMINATION VERSION

The draft determination version of Aquarius 3 has been released today. The Aquarius 3 software has been released via the website and can be found at
http://www.ofwat.gov.uk/aptrix/ofwat/publish.nsf/Content/Aquarius3_5.5

There have been a small number of changes since version 5.4.1 issued for use in the final business plan. These changes address the four "Known Issues as at 24 March 2004". We have also improved some of the functions within the software:

improved the editing and saving functions in the tariff basket model;
added an automated process for calculating the interest adjustment when moving from the actual balance sheet to notional balance sheet; and
added a switch to turn off/on all the efficiency calculations.

The release note with the software includes details of all the changes made since the final business plan version.

We have updated the input definitions guide and the user manual in light of the changes made to the model. These documents are available on our website.

In response to a suggestion from the Water UK Aquarius 3 modeling sub-group, we have constructed a trial dataset for company ABC. In this datset we have generated two revenue assumption sets from the tariff basket model and a modelled scenario from the financial model using the draft determination version 5.5 of the software. We have exported the modelled scenario and a revenue assumption set into csv file format in order for companies to test the import procedures in advance of 5 August.

The csv files we have created for company ABC trial draft determination are:

modelled scenario named "Trial draft determination" - this uses the K=0 revenue asumption set; and
revenue assumption set named "K=K".

Section 2 of the Aquarius 3 User Manual provides a step by step guide to importing files to the Aquarius 3 database.

If you have any problems installing or using version 5.5 of the software please contact us on aquarius3@ofwat.gsi.gov.uk.

Yours sincerely

DAWN HARRISON
Head of Financial Modelling

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