Content

1. Concurrent Evaluation – An Application for DLR’s Concurrent Engineering FacilitySECESA 2010, 13.-15. October, Lausanne, CH André Weiß, DLR Institute of Space Systems

2. Content • The Concurrent Engineering Process • Concurrent Evaluation – Three Examples • Mission Architecture Definition • Risk Assessment • Mission Extension Evaluation • Conclusion André Weiß, DLR Institute of Space Systems

3. The Concurrent Engineering Process Most important features of Concurrent Engineering: • Interdisciplinary Team • Well-defined, Streamlined Approach • Accelerating the Design Process • Responds to Customer Needs • Consistent Level of Understanding • Whole is More Than Sum of its Parts  Adapt for Evaluation Purposes André Weiß, DLR Institute of Space Systems

4. Concurrent Evaluation – Example One Mission Architecture Definition André Weiß, DLR Institute of Space Systems

5. Concurrent Evaluation – Mission Architecture Definition Precursor to Concurrent Engineering studies Mission Architecture Definitions result in a 10 to 15 pages long report on the following topics:  Requirements need to be defined • Science Objectives • Science Implementation • Mission Design André Weiß, DLR Institute of Space Systems

6. Concurrent Evaluation – Mission Architecture Definition The Process Step 1 • Introduction of the general concept through the customer • Payload and Mission analysis Step 2 • Identification of possible Mission Scenarios Step 3 (iterative for each scenario) • Definition of domain-specific tasks • Evaluation of requirements due to payload or environment André Weiß, DLR Institute of Space Systems

7. Concurrent Evaluation – Mission Architecture Definition SWON – The Prototype Study Objective • Observation of the Solar Far Side wrt Space Weather Implementation • Network of landers on multiple Inner-Earth asteroids Mission Design • Due to lack of experience, a full network mission proved to be not feasible • Alternate mission scenario: • Technology demonstrator mission to a single asteroid • Additional asteroid research-related payload André Weiß, DLR Institute of Space Systems

8. Concurrent Evaluation – Example Two Risk Assessment André Weiß, DLR Institute of Space Systems

9. Concurrent Evaluation – Risk Assessment Based on Risk Management • Failure Modes and Effects Analysis (FMEA) • Fault Tree Analysis (FTA) • Characteristic elements were identified • Implemented in the Concurrent Evaluation process André Weiß, DLR Institute of Space Systems

10. Concurrent Evaluation – Risk Assessment The Risk Assessment Process Step 1 • Subsystem and Mission analysis Step 2 • Development of a system map • dependencies between components • functional relationships Step 3 (iterated for each failure) • Clear identification of failure as well as its effects • Definition of possible solutions or workarounds André Weiß, DLR Institute of Space Systems

11. Concurrent Evaluation – Example Three Mission Extension Evaluation André Weiß, DLR Institute of Space Systems

12. Concurrent Evaluation – Mission Extension Evaluation 53% of exploration spacecrafts exceeded initial mission goals • Mission extensions have become quite common The intention: • Streamlining through concurrent approach • Responding to customer needs • Optimal “science return / cost” ratio André Weiß, DLR Institute of Space Systems

13. Conclusion Extend the concurrent approach across other phases Done elsewhere: Phase B  Concurrent Reviewing Analyzed here: Concurrent Evaluation  Adaptation of established methodologies  Definition of a new process André Weiß, DLR Institute of Space Systems

14. Thanks for your attention!&Any questions? André Weiß, DLR Institute of Space Systems