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ROM and DCA. Scene setting. Us. Our house. Our project manager. Our aspiration for our house. ROM. The project manager provides a rough estimate of the cost and timescale of the extension He does this by comparing our initial ideas with other work he has undertaken

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Presentation Transcript
scene setting
Scene setting


Our house

Our project


Our aspiration

for our house



The project manager provides a rough estimate of the cost and timescale of the extension

He does this by comparing our initial ideas with other work he has undertaken

He cannot assess other costs that may be incurred e.g. are the sewer and drainage pipes of sufficient capacity for the extended house. If we want this information we have to pay for a sewer and drains survey.

The project manager assessment lets us work out if our aspirations are achievable.

The project manager (from experience) suggests refinements to the plans and then we have something we think is achievable


Cost of DCA

This is the architect used

by the Project Manager

Having got an idea of what is achievable an architect draws up plans.

The Project Manager arranges for the architect and other surveys and planning permission submissions

We have to pay for these services

The plans are passed.



We have paid for the plans, surveys and planning permission.

The project manager gives a firm quote for cost and timescales, noting contingency areas and providing detailed impacts and plans for each room and the house structure e.g. roof, drains etc.

We re-assess the viability

At this point we can change the plans etc, if the plans are altered significantly we have to go through (and pay) for the revised drawings and further planning permissions submissions.


Project commencement

  • The project manager manages the extension work:
  • Builders
  • Plumbers
  • Decorators
  • Building Regulations control
  • Final sign-off

Project completion

The completed extension


UNC Mod process and Xoserve

  • Assumes User Pays mod and “sunny day” journey
  • Mod raised
  • Business rules defined
  • Xoserve produce Rough Order of Magnitude
  • Mod development proceeds
  • [Xoserve produce Detailed Cost Analysis]
  • Xoserve produce Agency Charging Statement
  • Mod approved
  • Xoserve develop solution
  • Mod implemented
  • User Pays service starts, costs recovered

UNC Mod process and Xoserve

  • Rough Order of Magnitude (ROM)
    • Requires business rules
    • Xoserve assess (desktop exercise) impact to systems, compare to previous changes and assess timescale and cost range. Note: certain aspects cannot be estimated e.g. changes to IS systems capacity without incurring costs
    • Used to assess if business case behind mod is still valid
    • Date range is development timescale not implementation date for mod
  • Detailed Cost Analysis (DCA)
    • Requires detailed business rules and volume usage
    • Xoserve complete analysis phase of the project to determine design, development, testing and implementation activities.
    • DCA provides firm costs and development timescales for the change
    • If the change proceeds, the work done in the DCA is re-used
    • DCA are chargeable to industry

UNC Mod Process and Xoserve

  • Mod Review 334 Post Implementation Review of Central Systems Funding and Governance Arrangements, review points
  • Proposer to discuss mod with Xoserve prior to raising to create more informed proposal
  • Shippers to provide demand information
  • Check point for community to assess business case
  • Basis and purpose of ROM is understood
  • User Pays charging basis fully developed
  • Xoserve to be more assertive in raising concerns