Systems Flashcards
What is Systems Engineering?
Systems Engineering is an interdisciplinary approach and means to enable the production of robust systems, on-time and on-budget
What is a System?
A system is a set of interrelated subsystems and components which interact with one another in an organized fashion toward a common purpose.
What are the four main groups a systems engineer interacts with?
Management, Product Assurance, Operations & Logistics, Production
What is the purpose of the ECSS (European Commission for Space Standardisation)?
ECSS provides baseline working practices for systems engineering in line with eSA/EU/industry requirements and recommendations
Sequential vs Centralised vs Concurrent Design
Sequential goes from on person to the next in sequence.
Centralised has people communicating to a manager in the center, but not to one another.
Concurrent has all teams communicating to everyone.
What is phase 0 in a project lifecycle?
Pre-Phase A
What is Phase A in a project lifecycle?
Feasibility
What is Phase B in a project lifecycle?
Preliminary Definition
What is Phase C in a project lifecycle?
Detailed Definition
What is Phase D in a project lifecycle?
Production
What is Phase E in a project lifecycle?
Utilization
What is Phase F in a project lifecycle?
Disposal
What are the 9 types of mission requirements?
Functional, Configurational, Interfaces, Physical, Evironmental, Quality Factors, Operation, Support, Verification
Level 1 of the System Specification flow?
System
Level 2 of the System Specification flow?
Subsystem
Level 3 of the System Specification flow?
Set
Level 4 of the System Specification flow?
Equipment or SW product
Level 5 of the System Specification flow?
Assembly
List the four types of requirement verification:
Test, Analysis, Review of Design (ROD), Inspection
Where is the bulk of money spent during the system development process?
Design and Development
Why are there cost overruns?
Cost overruns are caused by unrealistic technology readiness assumptions and underbidding in order to win projects. Can be minimised by a thorough project definition.
Describe the procurement āVā Process in flowing designs then feeding back hardware
Project initiator (MDR), Top level customer (PRR/SRR/PDR), 1st, 2nd, 3rd, etc. customer (PDRs), reverse order suppliers (CDR/QR/AR), System Operator (CRR)
What is an MDR?
Mission Design Review
What is a PRR?
Preliminary Requirements Review
What is a SRR?
Systems Requirements Review
What is a PDR?
Preliminary Design Review
What is a CDR?
Critical Design Review
What is a QR?
Qualification Review
What is an AR?
Acceptance Review
What is a CRR?
Cutover Readiness Review
State four types of hardware models in hardware qualification philosophy which may be built in a development program prior to the final fight models.
Programmatic Constraints, Integration & Test Programme, Development Status, Verification Strategies
What are Programmatic Constraints?
Schedule/Cost, Industrial Architecture, Reviews, Interfaces
What is included under Integration & Test Programme
Test Requirements, Test sequences, Test configurations, Test facilities
What contributes to Development Status?
New Technologies, Design Qualifications, Heritage, Potential Suppliers
What Verification Strategies are taken into consideration in a development programme?
Requirements categories, verification methods, verification levels, verification phases.
In order, Describe the potential tests and ECSS test sequence which a system/subsystem would have to go through during a typical qualification test.
Physical properties, humidity, leak, pressure, leak, acceleration, sinusoidal vibration: (Random Vibration & Accoustic), Shock, Leak, Corona and arcing, Thermal cycling, Thermal Vacuum, Leak, EMC/ESD, Life, Microgravity, Audible noise
