DS8: Overall System Design & Preliminary SKA Plan :

1. DS8: Overall System Design & Preliminary SKA Plan :

2. DS8: the final product! EC SKADS proposal March 2004 “At the end of DS7 a preferred design to satisfy the multi-field-of-view requirement will be selected and we will then proceed to a single system design (DS8)”. Now need to cohere with the reference design

3. Proposal in accepted Zandaam (February 2005): DS8 should not be a separated effort but a joint one, carried out by those who have led the work DS8: the final product! • Whole point of the Design Study: • to find a way to build the SKA which convinces international community and funding agencies • the DS(-T)s are not are ends in themselves • Importance of Ownership of the results • we all have to “own” the final product • we need a scheme which produces that and allows all to contribute • collegiality is very important

4. DS8: the final product • “The aim is to produce i) an “end-to-end” architectural and functional design for the preferred concept and a costing, paying attention to the civil works required for the array; ii) a study of funding sources and iii) a preliminary project plan.” • “Requires us to pull together the results from the entire work programme and to incorporate technology foresight.” • “The deliverable will take the form of a Square Kilometre Array “White Paper” that will contain a preliminary project plan to be submitted to the International SKA Steering Committee in 2008”. Now have to cohere with international project plan

5. DS8:deliverables and timelines DS8-T1 Overall System Design T0+46 Report DS8-T2 Preliminary SKA Plan T0+47.5 Report Overall System Design and Preliminary SKA Plan T0+ 47.5 Combined report “This DS will not be required until very close to the end of the study and its format and structure will be decided closer to the time”. (EC SKADS PROPOSAL)

6. SKA timeline ‘1% SKA’ Science International review of design Legal Entity for SKA Formed ISSC MoA-2 SKA Complete Initial concept ‘10% SKA’ Science First SKA Working Group ISSC MoA-1 Science Case published Site ranking Site Selection { …… { { 92 96 0405 06 07 08 09 1014 18 22 { 2000 2000 { { { Feasibility study Concept exposition SKADS Define SKA System Phase 2 Build 50% SKA Design & Build SKA pathfinders ATA, KAT & xNTD 1% SKA Select Reference Design Phase 1 Build 10% SKA Phase 3 Build 100% SKA LOFAR 10% SKA at 100 MHz

7. DS8: the final product • DS8-T1 Overall system design (UMAN):to optimise the station architectural design and in terms of scalability, functionality and to minimise the cost vis-à-vis anticipated technology changes; to produce an “end-to-end” architectural and functional design for the preferred concept. The principal objectives are: 1) to follow the advice of the Design Review Committee (DS7)and to use the outcomes of the technical preparatory work to establish a multi-parameter cost equation and its derivatives for a range of station technologies/architectures 2) to examine the most cost-effective upgrade routes, since SKA’s scientific output will be limited by the processing power available at any given time.

8. DS8: the final product! • DS8-T2: Preliminary SKA plan (ASTRON):to provide an overview of the plan from design to construction, including a study of funding sources. There are two main products: an organisational plan and an operational plan. Other issues to be considered include: 1) industrial partnerships 2) an IPR plan 3) funding mechanisms 4) links with international SKA effort and possibility of a “hybrid” design involving more than one collector technology. 5) maintenance requirements of the SKA 6) a reliability analysis (assessment of failure modes) of the SKA 7) a risk analysis for the entire plan

9. The DS8 TEAM • P. Wilkinson (UMAN) - coordinator • The SKADS Executive Committee - The Chairman, vice-chairman of Board - The Management Team - The leaders of the DS - “At large”: S. Rawlings (SWG) PLUS – as appropriate • Members of SKADS Board - Experience of funding/politics/governance (Experience of industrial consultants via DS7 final report) (Experience of ALMA & LOFAR via DS7 final report) • European SKA outreach members – report production skills

10. DS8: the final product! • Producing the final report: – steps towards this must be organically linked in with overall management and month-month coordination of the DS – it is the culmination of these processes, not a separate entity -- the report to include all the EC requirements e.g. including DS2 results on science scope and technical specification -- form of links between DS-Ts within each DS and between DS not yet crystallized  premature to be prescriptive on how the “DS8 team” will work • BUT…… • SKADS is self-sufficient for producing DS8 • SKADS DS8 team must work closely with ISPO

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12. SKA timeline ‘1% SKA’ Science International review of design Legal Entity for SKA Formed ISSC MoA-2 SKA Complete Initial concept ‘10% SKA’ Science First SKA Working Group ISSC MoA-1 Science Case published Site ranking Site Selection { …… { { 92 96 0405 06 07 08 09 1014 18 22 { 2000 2000 { { { Feasibility study Concept exposition SKADS Define SKA System Phase 2 Build 50% SKA Design & Build SKA pathfinders ATA, KAT & xNTD 1% SKA Select Reference Design Phase 1 Build 10% SKA Phase 3 Build 100% SKA LOFAR 10% SKA at 100 MHz

13. The SKADS Executive Committee • Monitor progress of the SKADS activities against the milestones agreed by the Board. • Receive progress and financial reports of all activities via the SMT. • Receive periodic reports from the Design Study Task leaders. • Act on strategic decisions and recommendations made by the SKADS Board. • Report to the Board on a regular basis on the progress of SKADS and on any strategic issues requiring attention. • Chairman, vice-chairman of Board, the SKADS management team, leaders of the Design Study Tasks

14. Comments from Dec 20/21 Zandaam Meeting • System-engineering tasks in DS3/DS4/DS5/DS6 all to be coordinated by the Project Engineer • A “system design” team must emerge – from system engineering teams in all other places – linked by the Project Engineer. • In LOFAR: the system architecture role is different from project engineers the coordinating role  the DS7 Project Engineer the architecture role  the DS8 task • In ALMA there is an “integrated project team” reporting to central management which includes the project engineer who is responsible for all technical work - supported by a lot of system engineers on the various projects.