1. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU Introduction to System Engineering ISE 102 Spring 2007 Notes & Course Materials Asst. Prof. Dr. Mahmut Ali GOKCE ISE Dept. Faculty of Computer Sciences

2. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU What Will We Learn??? Systems Engineering Methods & Tools Systems Engineering Life-cycle Process Systems Engineering Management

3. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU Definitions of System Engineering Structure: Management Technology to: –assist in the formulation, analysis and interpretation of: –impacts of proposed policy, controls, and systems on: – needs, institutions and values under investigation

4. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU Function: Methods and Tools –to support analysis of large-scale, dynamic and complex systems, –to support process-oriented management practice and –to provide effective & efficient trade offs among alternatives Definitions of System Engineering

5. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU Purpose: For engaging in system engineering –To develop information and knowledge organization –To support definition, development and deployment of total systems –To assure integration and high quality relative to reliability, availability, maintainability, operability … ilities. Definitions of System Engineering

6. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU Functions of Systems Engineering Formulation of the System –Needs to be fulfilled –Requirements & Objectives –Constraints and Degrees of Freedom –Alternatives to above Analysis –Determine the impact of varied alternative courses of action Determine the course of least constraint Determine the risk mitigation strategy Interpretation of Analysis –What does it mean for the system design as proposed

7. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU What are the Functions Applied To?? Design, Develop, Deploy Systems –Large in Scale –Large in Scope –Large in Range of Impact System Types –Physical Systems –Human & Organizational Systems –Enterprise Systems –Information Systems Systems of Systems Aerospace examples

8. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU

9. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU What is a System? Group of Components that work together for a purpose –Service –Product –Process –Every system has boundaries, input & output Attributes: discernable manifestations (expression) of the components Relationships are links between Components & Attributes

10. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU Components Properties Properties & Behavior of each Component has an influence on the properties & behavior of the set as a whole Properties & Behaviors of each component of the set depends on the properties & behaviors of at least one other component Each possible subset of the components has the two properties listed above: i.e. the components cannot be divided into independent subsets

11. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU When you decompose what do you get?? Components –Structural: Static Elements of a System –Operating: Perform Processing –Flow: Materials and energy or information being altered by system operations

12. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU Extra Material: Relational View (as opposed to System View ) Relations exist between component pairs (though many pairs may share relations) Relation is formed from the imminent qualities of the components (e.g. their essential characteristics) System is in physical, temporal and spatial arrangement of components Relations imply direct interactions. Systems are defined by the common reference to the entire set of components

13. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU Extra thoughts Relationship orders: –First order: functionally necessary – symbiosis –Second Order: Synergistic (relationship adds to the system performance) –Redundancy replication for purpose of system continuation –Do redundant systems contain more or less information than non-redundant systems?

14. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU How can system be known?? State of a System –Collection of variables that describe a system from a perspective and at specific time –Variation in perspective –Variation in temporal resolution System Engineering Knowledge –Principles –Practices –Perspectives

15. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU Extra Thoughts: How can system be known?? Thought then has objective validity because it is not fundamentally different from the objective reality but is specially suited for the imitation of it. The fundamental nature of neural machinery lies in its power to parallel or model external events. KJW Craik The Nature of Explanation (Cambridge, 1952)

16. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU How is a System Understood ?? Decomposition Analysis Aggregation More than the sum of its parts –Emergent –Self-organizing –Engaged in energy exchange

17. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU Steps and Phases Formulation Analysis Interpretation

18. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU What is a System Life Cycle? System Planning and Marketing Research Development Testing and Evaluation System Acquisition & Deployment & Production

19. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU System Life-Cycle Formulation Analysis Interpretation System Definition Formulation Analysis Interpretation System Development Formulation Analysis Interpretation System Deployment

20. Mahmut Ali GÖKÇEIndustrial Systems Engineering @ IEU Looking at a System Formulation of the System –Needs to be fulfilled –Requirements & Objectives –Constraints and Degrees of Freedom –Alternatives to above System Definition & Identification Process –What is your system? –What is its purpose? –What are its Components (structural operating & flow), Attributes and Relationships? –What are the attributes that define its state?