4.4.6 - Thermal Control Subsystem (TCS)

4.4.6-7 Level 2 Tasks

Tasks Applicable Mission Phases Description SFWC Artifacts References
4.4.6-7-1 Ensure manufacturing capabilities are space-qualified, and can support subsystem designs Phase B | Phase C | For Preliminary Design Review, ensure provision of overall manufacturing plan and qualification status. For Critical Design Review, ensure updates as needed. Include all subcontracts. Ensure that manufacturing producibility and quality assurance is verified and conform to the applicable standards, processes and controls prior to build. NA NA Mission Assurance Guide, TOR-2007(8546)-6018, Rev B, Manufacturing Assurance Chapter
4.4.6-7-2 Ensure that the "As Built" subsystem is compliant with documented design Phase D1 | Ensure end item data package review is conducted of the delivered product, design schematics, and test results NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Mission Assurance Guide, TOR-2007(8546)-6018, Rev B
4.4.6-7-3 Ensure independent audits are conducted to verify manufacturing management and processes flow to the supplier level Phase B | Phase C | Phase D1 | Ensure that manufacturing quality requirements flow from the prime to the lowest level (e.g., part supplier). Ensure contractor, subcontractor, and part/component vendor manufacturing follow applicable standards. Ensure that the following is addressed: manufacturing management, process maturity, supply chain management and process control. NA NA Mission Assurance Guide, TOR-2007(8546)-6018, Rev B, Manufacturing Assurance Chapter
4.4.6-7-4 Ensure functional configuration audit/physical configuration audit are planned and completed for each element in the subsystem Phase C | Phase D1 | The FCA is the formal examination of the "as-tested" functional characteristics of a configuration item (CI). The audit is to verify that the item has achieved the requirements specified in its functional baseline documentation, and to identify and record any discrepancies. Functional configuration audits are conducted on both hardware and software configuration items to assure that the technical documentation accurately reflects the functional characteristics of each. The PCA is the formal examination of the "as-built" configuration of a configuration item (hardware and software) against its technical documentation. The PCA normally includes a detailed audit of engineering drawings, specifications, and technical data (including COTS documentation). The PCA for a CI should not be started unless the FCA has already been accomplished. After successful completion of the audit and the establishment of a Product Base Line (PBL), all subsequent changes are processed by formal engineering change action. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Mission Assurance Guide, TOR-2007(8546)-6018, Rev B
4.4.6-7-5 Ensure appropriate specialty disciplines are engaged to assess manufacturing and build processes Phase B | Phase C | Phase D1 | Assure contractor engages the relevant disciplines (design, manufacturing, quality assurance, PMP engineering) to review and assess all subsystem drawings and specifications to ensure parts, materials and design can be manufactured and integrated into next level of assembly. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Mission Assurance Guide, TOR-2007(8546)-6018, Rev B
4.4.6-7-6 Ensure manufacturing process mapping is complete before production begins and adequate schedule exists Phase C | Phase D1 | Ensure process mapping provides an understanding of the work flow from basic flight component, to assembly to subsystem to system. Ensure mapping provides insight into the length of time required to complete each manufacturing task and sequence of tasks and provides input to program schedules. NA NA Mission Assurance Guide, TOR-2007(8546)-6018, Rev B, Manufacturing Assurance Chapter
4.4.6-7-7 Ensure manufacturing and build process monitoring /control for the subsystem Phase C | Phase D1 | Assure manufacturers impose strict controls on each item in addition to detailed traceability for each item. Process monitoring should include statistical process control and other metrics as appropriate to the process to reduce variability and defects and ensure quality. Data collection should include characterization of item performance, documentation of any discrepancies and failure analysis report. NA NA Mission Assurance Guide, TOR-2007(8546)-6018, Rev B, Manufacturing Assurance Chapter
4.4.6-7-8 Ensure Material Review Board process is defined, implemented and sufficiently resolves all dispositions Phase C | Phase D1 | Review all dispositions with special emphasis on "use as is" decisions. Data pertaining to resolution of manufacturing /test discrepancy reports and identification numbers of critical tools and test equipment used on flight hardware should be documented. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Mission Assurance Guide, TOR-2007(8546)-6018, Rev B
4.4.6-7-9 Ensure thermal blankets are constructed using standard practices with provisions for venting, grounding and are constrained to prevent interference with moving mechanical assemblies Phase B | Phase C | Ensure that nominal blanket effectiveness parameters assumed in thermal modeling agree with design approach. Ensure blankets are adequately constrained to prevent interference with moving mechanical assemblies. NA NA Spacecraft Thermal Control Handbook Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494
4.4.6-7-10 Ensure that batteries are thermally protected through all phases of design, testing, and launch pad operations Phase B | Phase C | NA NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494