DEFINITION:

Covering the early phases of a project development life cycle, focusing on requirement engineering, specification and architecture formulation.

It also covers system aspects and AOCS/GNC functional chain engineering.

(Source: ESA TD8A (Subdomains 1 and 2) and TD5A (Subdomains 3 to 6))

SUBDOMAINS:

1. Specification Methods and Tools: Methods and tools to support the capture, modelling and validation of requirements, including definition and formalisation of system architectures.

2. Requirement Engineering: Methods and tools to support the system requirement engineering process, including requirement management and related database issues.

3. AOCS/GNC Architecture: Includes concept and mode definition, and selection and accommodation of sensors and actuators.

4. Autonomy and FDIR: Covers control-related aspects and implementation (with 1-E-5 and 1-K-2).

5. Pointing Error Engineering: Covers budget methodology and tools.

6. Control Requirements Engineering: Includes software algorithm specification (with 1-E-5) and sensor and actuator specification.