1

Management•Overview•Schedules

Jim OschmannJeremy Wagner

Project Approach

• Small “systems” design team– Small core with all disciplines represented– Review procurement options

• How much vendor involvement early?• How to ‘break down’ job into sensible packages• Involve industry for early design and cost input

• Restrict new or advanced technology to critical areas• Major trades early

– Look for upgrade paths for future improvements options

2

Design Phase Cost Drivers

• How to break down system design• Think of construction phase to optimize• Search for fit for capability at reasonable system level

– Trade minimal level of subsystem breakdown with maintaining a competitive process

• What can we copy from other projects?• Minimize risk and development effort

• Modular approaches to allow upgrades where possible• Unique for this telescope:

• Optics Manufacturing• Scattered light control• Heat stop• Thermal control• Desired wide level of flexibility

Technology assumptions, science requirements drive design costs

Contingency PlanningA Key to Risk mitigation

• Hold budget for contingency• Prioritize science requirements/goals

– Design with mind toward achieving goals– Modular upgrades in case money is limited

• No time to re-do major designs at end of design phase• Exception are items easily cut or defined as future additions

• Establish Time contingency in project schedule– Allowing time and money for recovery from problems– Establish key dates for decisions, early

Stick to them

Most projects need financial and functional contingencyOptions for future upgrades if financial limits are exceeded

3

Management & Systems

• Requirements– Define system performance requirements

• SRD (based upon draft & discussions)

– Flow down requirements• Use Cases, error budgets, etc.• DRD

• Define major subsystems– Ensure flexibility– Keep construction in mind

• Industry capabilities• I,T&C

– Frequently update construction cost estimates

Management & Systems

• Define interfaces– N^2 chart – ICDs

• Develop WBS– Based upon subsystem definition and interfaces– Accounts mirror WBS

• Schedule– Define major milestones

– Top-level schedule through construction and commissioning– Identify critical and near-critical paths– Long-lead items (e.g. M1, enclosure)

• Iterate

4

WBS

Design Phase Milestones

• Conceptual design phase– Major trades accomplished as early as possible

• First order analysis of performance system wide, for preferred approach(s)• Need ‘big’ decisions early during this phase

• Preliminary design phase– All major system approach choices made

• Concentrate on details of the one approach• Instrument integration and operational considerations• Involve partner and manufacturing organizations in process where possible

– Need good handle on construction costs with contingency• Include initial integration, test and commissioning planning

– Construction phase proposal submitted during this phase• Critical design phase

– Preparing construction detailed design & specifications• Procurement planning• Integration, test & commissioning planning• Operational planning

5

D&D Milestones

• Final designs of many systems to be completed during construction – Limited by D&D funding provided

• Vendor final design & fabrication drawings• Non – critical path items

Critical Path

6

Long Lead PlanM1 Blank Procured During D&D

Long Lead PlanCritical Path

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Long Lead PlanSite Selection Near Critical Path

D&D Phase Budget Overview

• $2.7M Partner work• Staff costs ~6M• Design/study contracts and some non-payroll expenses ~2.2M

• Recent night time telescopes spent from a few million to over $20M for equivalent phase

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Project Management

ATST D&D ExpendituresSeptember 30, 2002

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Early Tests

• In process– Site Testing

• Six sites (seeing, dust, weather, etc)

– Higher order AO (being done at two facilities)

• Potential plans:– Heat stop prototype (seeing/thermal performance)– Enclosure temperature tests (seeing)– Dust accumulation under ventilation

• Add samples to test at each site?

– Software/controls simulator

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Concerns

• Beside schedule & money in general…– Top level trades completed early

• Pressure to pursue multiple major design activities• Site Selection

– Money and choices for long lead items– Fabrication of fast primary mirror

• Studies being done to address this• Major driver if we cannot produce an f/2 mirror

– Prioritization of science requirements• Clarifications• Priorities• Some draft requirements may be un-achievable

– Being worked with SWG– Construction funding availability in timely manner

• Funding agency time frame and competition• Setting up any partnerships early enough