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Development life cycle

Up-to-date design process of avionics/Planning process/Development life cycle/

Fig. 1.5. Interrelation between the different documents, regulating the OBE design process.
Fig. 1.5. Interrelation between the different documents, regulating the OBE design process.
The project management principles of OBE and its components development shall be based under interconnected and closed-circuit processes, that are stated by the international quality control (ISO 9000, ISO 10006 standards), lifecycle (ISO/IEC 15288, ISO/IEC 12207), and certification (P-4754A, ARP-4754a, DO-178C, DO-254, DO-297) standards and manuals for civilian aircraft certification and on-board equipment (OBE) qualification considering the necessity to held these activities at EASA or FAA.

These standards and manuals determine the OBE lifecycle structure.

The relation between different documents specifying OBE designing processes is shown at the fig. 1.5.

The following levels of responsibility are determined during the aircraft (AC) development and its modification (in case that there are introduction of changes into the AC type design):

  1. Aircraft Developer level.

  2. IMA system and airborne avionics integrator level.

  3. Systems, components, IMA platform and software (SW) developers level.
OBE systems and equipment (components) design and certification processes shall be done in accordance with P-4754A/ARP4754a manual. These processes have the V-model structure (fig. 1.6). >>>
Fig. 1.6. OBE systems and equipment general development process.
Fig. 1.6. OBE systems and equipment general development process.
>>>  Development project lifecycle of OBE (as a highly-integrated complicated system) may include the following processes:
  1. The development planning:

    1. the determination of project associate contractors cooperation and the organizational structure of the management;
    2. the determination of work hierarchy structure on OBE development and schedule-plan composition.

  2. The order:

    1. the preparation and conduction of the tender to choose a Supplier of OBE systems and equipment;
    2. the delivery and negotiation with Suppliers the documental requirements to the contract item and the determination of parties responsibilities;
    3. the preparation and formation of a contract wit the selected Supplier of OBE systems and components;
    4. contracts with Suppliers administration and contracts closure.

  3. OBE requirements capture:

    1. an aircraft certification basis;
    2. generic Technical Specification (requirements specification on the complex);
    3. specification on OBE;
    4. design and architecture specification on OBE;
    5. interfaces specification;
    6. OBE function’s functional hazard assessment (FHA);
    7. OBE preliminary system safety assessment (PSSA);
    8. system level requirements specifications on the AC functions and/or certain systems;
    9. IMA platform specification;
    10. equipment and its components technical specifications. >>>
  1. OBE architecture definition:

    1. the system requirements analysis and refinement;
    2. functional hazard assessment (system level);
    3. system components composition analysis;
    4. system architecture development;
    5. preliminary system safety assessment;
    6. system structural configuration development;
    7. equipment layout sketch on board development;
    8. system power supply scheme development.

  2. OBE systems and equipment integration and testing.

  3. Reliability and fault-safety assessment:

    1. functional hazard assessment (FHA);
    2. preliminary system safety assessment (PSSA);
    3. system safety assessment (SSA);
    4. common cause analysis (CCA).

  4. Requirements validation and verification.

  5. Configuration management.

  6. Quality assurance.

  7. Certification support.
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