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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
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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
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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
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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
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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
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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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2,000
4,000
6,000
8,000
10,000
12,000
2000 2002 2004 2006 2008
Year
Bu
dg
et P
lan
(00
0's)
Totals by YearCummulativeNSF Plan Total by YearNSF Plan
Cummulative
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Project Management
ATST D&D ExpendituresSeptember 30, 2002
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2,000
4,000
6,000
8,000
10,000
FY01 FY02 FY03 FY04 FY05 FY06
Exp
end
itu
res
(000
's)
Actual CumulativeExpendituresBudget Plan Cumulative
NSF Plan Cumulative
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