1. Assignment Workshop 2
16th September 09, Solihull

2. Overview Background ROM 1387 ROM 1585 ROM Analysis Explanation
Questions

3. Background
National Grid NTS has had a number of discussions with Industry about the concept of NTS Entry Capacity Assignment:
“ NTS Entry Capacity assignment entails the transfer of financial liability in addition to the entry capacity entitlement ”
National Grid NTS raised 2 Rough Order of Magnitudes (ROMs) with xoserve:
EVS1387
EVS1585
Please note that a ROM request is not based on formal systems analysis and is not a replacement for a detailed analysis and must not be taken as a formal quote

4. ROM EVS1387 – Generic Assignment Process
ROM EVS1387 based on the following requirements:
User driven (NG or Shipper)
Applicable from a future date
On an enduring basis
Includes both full and partial assignment
Assigned NTS Entry Capacity to be tradable
Assigned NTS Entry Capacity to be tracked

5. ROM EVS1585 – As part of Voluntary Discontinuance
Deliver National Grid NTS’ UNC obligation
To facilitate the voluntary discontinuance of a redundant shipper short-code
Requirements of ROM EVS1585
Enable the assignment of long term entry capacity rights as part of an assignment of rights and obligations – not as an assignment of NTS Entry Capacity.
The existence of long term entry capacity entitlement and liabilities are assigned to 1 single specified shipper

6. ROM Process
Presented by xoserve

7. ROM Process Overview (1)
A defined method to request and receive appropriate analysis to support the development of industry changes.
It has been incorporated into MOD 213.
A light process that balances flexibility and control
A process capable of aligning to the needs and timelines of industry change processes (subject to resources and priorities)

8. ROM Process Overview (2)
ROM requests should be timed in relation to the state of the proposed change;
Likelihood that the change will be supported / funded by the community and approved by the regulator
Clarity and stability of objectives, rules and requirements
Input needed to initiate ROM analysis;
As per ROM template:
Documented business objectives
Documented business principles
Documented draft business rules
Performance considerations .i.e. best estimate for…
Volumes for transactions / business events
Timeframe for transactional purposes

9. Limitations of ROM exercise (1)
Following analysis of the business rules, a number of techniques are used to derive alternate estimates which are then used to specify the range of cost estimates. Techniques include:
Rough estimation by experienced solution experts
Identification of impacted and new logical functional elements and comparison to the equivalent functional elements for a previous project already costed. The comparison is used to extrapolate a ROM cost for the potential change.

10. Limitations of ROM exercise (2)
The analysis is limited by time and is only a snapshot of xoserve’s understanding of the change at that moment.
Consequently,
ROM costs are highly indicative;
Decisions to proceed to delivery should only be based on detailed cost analysis (DCA) obtained through the MOD 213 process.

11. Next Steps

12. Next Steps
Industry need to consider options for best fit and discuss within their workgroups
Develop business rules, system requirements, funding arrangements (etc)
When Industry in accord
Submit Draft Modification Proposal
Submit request to xoserve for Detailed Cost Analysis (DCA) via National Grid NTS