Constellation Space Transportation Planning Office Operability Program Management Challenge February 2010 Carol Scott Constellation Space Transportation Planning Office (CSTP) 1 Used with Permission
Operability for Constellation SystemConstellation Space Transportation Planning Office Constellation Program has made progress toward operability during the early design phase of life cycle Constellation Space Transportation Planning office developed Constellation Operability Advocacy Assessment. Current State Operability – Definition Current Approaches New Operability Efforts 2
Scope - OperabilityConstellation Space Transportation Planning Office To have successful, safe, and cost effective mission execution: “Performance” must be balanced with “Operability” in the system engineering design process Therefore design engineers must consider: How one part of the design solution effects the safe processing and operations of the system and the other portions of the total system engineering solution How a design decision must be incorporated into the hardware/software through the stages of the lifecycle How trades are made between technical design, design cost/schedule considerations, and operations cost/schedule considerations 3
Design Solution Example: Upper Stage Helium BottleConstellation Space Transportation Planning Office Performance vs. Operability I can gain performance by placing helium bottles inside cryogenic hydrogen tank, taking advantage of cold hydrogen, leading to smaller helium bottle. How one part of the design solution effects the safe processing and operations of the system and the other portions of the total system engineering solution Design Solution for helium bottle location for Upper Stage Can the Upper Stage hydrogen cryogenic system operate sufficiently with helium bottles in Upper Stage, leaks? What are production issues, ground processing issues, special flight operation procedures? Added complexity to maintaining ullage pressure during flight? How a design decision must be incorporated into the hardware/software through the stages of the lifecycle Design solution evolution from PDR/CDR/ Production Operations and Sustaining How trades are made between technical design, design cost/schedule considerations, and operations cost/schedule considerations Helium bottle location in hydrogen tank vs. tank major structure Structural loads for tank position Design cost and schedule for each option Operations sustaining cost and schedule for production, ground and flight 4
Current StateConstellation Space Transportation Planning Office Operability – no common agency/program definition Initial design trade studies focus on performance first. Operability becomes a focus after vehicle performance requirements are established Operability consequences of utilizing heritage hardware and infrastructure Heritage facilities bring fixed constants affecting operability Clean sheet will usually have fewer facilities Heritage facilities have fixed capacities, may be more than CxP needs Heritage facilities must concurrently accommodate CSTP production & operations and CxP modifications for lunar phase Estimated Constellation production, sustaining and operations (Phase D&E of life cycle) costs are too high 5
Operability – DefinitionConstellation Space Transportation Planning Office Operability is the summation the system characteristics (Producibility, Reliability, Interoperability, Sustainability, Maintainability) to ensure safe flight while minimizing fixed and variable costs during the Production, Operating and Sustaining Phases (Phase D & E) of the life cycle. Producibility is the ease and economy with which a completed design can be fabricated, manufactured or coded into hardware/software products. (SP-6105 Dec 2007) Reliability is robustness of system to be fault tolerant during Producibility Op its operating parameters and environment to safely achieve the Reliability erab mission Interoperability ilit (SP-6105 Dec 2007) y Sustainability Interoperability is the ease of exchanging data between Maintainability design and operations tools for reduced human error and complexity of the integration tasks (SP-6105 Dec 2007) P + R SummationM = O +I+S+ Sustainability is upholding and supporting the configuration of the system through the operating life cycle. Maintainability is the inherent characteristics of a design that contribute to the ease and economy to assemble, integrate, retain or restore the hardware/software to specified conditions safely and accurately (SP-6105 Dec 2007) OPhase D&E = OProduction + OGround + OFlight + OManagement Systems 6 SP-6105: NASA System Engineering Handbook Dec 2007
Current ApproachesConstellation Space Transportation Planning Office CxP Operability Evolution Constellation Architecture Requirements Document (CARD): high level operability requirements Constellation Operability Optimization List Numerous examples for operability derived between Ground Operations and Flight Design projects Ares Operability Assessment Team Established Dozens of operability changes incorporated between Ares and Ground Operations projects during PDR cycle collaboration Software and data architecture emphasizes moving from document management to data management Cx program operations engineer position added to help identify key operations engineering activities throughout 2007 to present Orion’s PDR included operability as emphasis area 7
Operability SuccessesConstellation Space Transportation Planning Office Ares I/ Ground Ops Adoption of mono-propellant systems for RoCS, ReCS and FS TVC Commonality of commodity reduces processing hazards/loading timelines/maintenance cost ReCS service panel relocation to OML for access ease RoCS service panel relocation to I/S door area eliminates access arm Interstage door relocation aligns for ReCS service panel and eliminates 2 separate access arms Orion Production Developed segmented Crew Module (CM) concept Saves four months of AI&P schedule in the O&C Top half the CM is welded after outfitting (Previous to this design the only access was via the hatch) Implement cable harness wire identification Ground Ops VAB Platforms New platforms selected over modified Shuttle allowing for optimal access Separate VAB platform levels, not ganged platform assemblies, allow for individual platform operations reducing operational constraints between task Platform inserts at vehicle interfaces providing flexibility for future vehicle changes 8
New Operability EffortsConstellation Space Transportation Planning Office Agency establishes CSTPO: Production, Operations, and Sustaining counterpart to the Constellation Program’s DDT&E role. Cx Associate Program Manager for Operations and Sustaining Constellation Program Constellation Space Transportation Program LEO Lunar Mars 9
New Operability EffortsConstellation Space Transportation Planning Office CSTP Organization Establishing interfaces between CxP and CSTP (ESMD and SOMD) Interfacing with CxP boards and panels Embedding into design centers’ processes Evaluating cost drivers during the next two PPBE cycles Evaluate mechanisms for funding operability opportunities CSTP Technical Authority Support Engineering Co-located 24 Flight Program System Engineers (FPSE) w/ designers Evaluating operability opportunities during design (PDR-CDR) Safety & Mission Assurance Defining flight hardware safety organization structure and interfaces with JSC and MSFC S&MA 10
SummaryConstellation Space Transportation Planning Office Define Operability for Constellation phase D & E Address operability of production, ground operations, flight operations, management systems and lessons for the next Architecture Cycle (Lunar) To have successful, safe, and cost effective mission execution; “Performance” must be balanced with “Operability” in the System Engineering Design Process Performance + Operability = Mission Success Producibility Op Reliability erab Maintainability ilit y Interoperability Sustainability Optimization 11
Constellation Space Transportation Planning OfficeConstellation Space Transportation Planning Office NASA has established CSTP in late 2008 to be the Operations and Sustaining counterpart to the Constellation DDT&E Program CSTP is embedded into the CxP processes to prepare the Constellation Ares I/ Orion block I for the Operations and Sustaining phase of the life cycle. Includes Production, Ground Processing, Flight Ops and Recovery Charter: Lay the groundwork for the Constellation Space Transportation Program Work within the agency governance structure Establish in program/project activities and processes the Engineering Technical Authority Safety Technical Authority Health and Medical Technical Authority Work with the Cx program and projects to establish collaborative relationships Work closely with the Mission Operations Directorate at JSC Flight rule development, planning, ascent, on orbit, and reentry/landing support Constellation Space Transportation Program Charter: Manage the production, sustaining engineering, launch preparations, on-orbit and recovery of the Ares I/Orion vehicle configuration that will transport crew safely to/from the ISS
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