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

2. Slide 2 André Weiß, DLR Institute of Space Systems Content 1. The Concurrent Engineering Process 2. Concurrent Evaluation – Three Examples Mission Architecture Definition Risk Assessment Mission Extension Evaluation 3. Conclusion

3. Slide 3 André Weiß, DLR Institute of Space Systems 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

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

5. Slide 5 André Weiß, DLR Institute of Space Systems 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: Science Objectives Science Implementation Mission Design  Requirements need to be defined

6. Slide 6 André Weiß, DLR Institute of Space Systems 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

7. Slide 7 André Weiß, DLR Institute of Space Systems 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

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

9. Slide 9 André Weiß, DLR Institute of Space Systems 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

10. Slide 10 André Weiß, DLR Institute of Space Systems 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

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

12. Slide 12 André Weiß, DLR Institute of Space Systems 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

13. Slide 13 André Weiß, DLR Institute of Space Systems 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

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