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Complex Systems
- 1. Systems Engineering Complexity Types INCOSE WMA July 14, 2009
- 5. Complexity Complex systems Simple systems Systems using systems engineering
- 6. Spectra -1...Which systems? Less Complex More Complex Closed systems Open systems Clockwork systems Swarm systems Organized Self-organizing Weakly integrated systems Highly integrated systems Central control Decentralized control Single agents to pairs of agents Infinities of agents
- 7. Spectra -2...Characteristics Less Complex More Complex Understandable Difficult to understand Predictable Unpredictable Equilibrium Chaos Linear Nonlinear Loose coupling Tight coupling Control Adaptability Strict hierarchies Networks
- 8. Spectra -3...Consequences Less Complex More Complex Strict hierarchies Networks Simple behavior Strategic behavior Simple behavior Emergent behavior Clear cause and effect Unclear cause/effect Economy of scale available Economy of scale-killers Single scale Multi-scale Reductionism works Holism required
- 9. Theoretical types of complexity have have created via Dynamic complexity Development processes Things (Systems, products, things being engineered) Environment supports contains subtypes subtypes have has From current doctoral research Conclusion: Be clear which one you are talking about. Structural complexity Dynamic complexity: long term 5 Structural complexity: Size 1 Socio-political complexity 6 Dynamic complexity: short term 4 2 Structural complexity: Connectivity 3 Structural complexity: Architecture
- 12. Use ESE Profiler, get a number What are you measuring the complexity of? x Weights Sum 3 2 2 2 1 3 5 30 20 25 5 15 15 60 40 50 5 45 215 Use Development processes Things (Systems, products, things being engineered) Environment 1 Traditional 2 Transitional 3Messy Frontier Estimate: Dynamic complexity: long term 5 Structural complexity: Size 1 Socio-political complexity 6 Dynamic complexity: short term 4 2 Structural complexity: Connectivity 3 Structural complexity: Architecture
- 13. Complexity in Program 3/31/09
- 14. Program Complexity Over Time
Notes de l'éditeur
- The point is, which apply to SE? What do people mean when they say complexity? (Table 2 from recent draft paper) Discussion instructions...go over all 3 slides then come back to this one What can we agree is the best meaning on this page? (Maybe a composite?) Next Page? Next page? Is there a best among... the three pages? (Expect: no, everything is different, though some things are key like controllability, predictable, understandable
- Also Rigor on left, Richness on right, but as Barry Boehm said in SE LI meeting, they are kind of two different things.
- Dave sees 1-3 as the thing, how big is it? Dave sees 4 and 5 as ilities, RMA. 6 Dave sees that as regulations, standards, etc.