System Engineering

Saranya.VAP/CSE,

Sri Vidya College of Engineering & Technology,Virudhunagar

• All aspects of computer based systems development including hardware and software process engineering.– Usually use Waterfall model– Little scope for iteration between phases because

hardware changes are very expensive. Software may have to compensate for hardware problems.

• Much scope for misunderstanding here.• Different disciplines use a different

vocabulary and much negotiation is required.• Engineers may have personal agendas to

fulfill.

System Definition

• Simply known as functional unit.– Executes user written programs– Performs user designated manipulation– Includes arithmetic logic operations– Use common storage access.– associated software’s

• System engineering focuses on how complex engineering projects should be designed and managed.

• Define customer needs and required functionality early in the development life cycle, documenting.

System engineering process

SIMILAR:• State the problem(customer needs)• Investigate alternatives• Model the system• Integrate (bringing elements together) • Launch the system (output)• Assess performance (evaluation criteria)• Re-evaluation

Requirements definition

Sub system development

System design

System installation

System integration

System decommissioning

System evolution

• Interaction between engineering:– All major engg integration

– Bioinformatics:• Biotechnology• Information technology• etc

System engineering hierarchy

• Model:– Simplified representation of a system.

• Simulation– Computerized version of a model

• Modeling and simulation is a discipline for developing a level of understanding of the interaction of the parts of a system.

Hierarchy• World view– Public health care, e governance trade and

commerce, banking & finance.• Domain view– Concentrate on specific domain– Education• College, school, etc

• Element view– Focuses on sub domain(Admission,exams,etc)

• Detailed view– (internal marks, university, internal…)

Modeling the system

• Explains how the system is working.• Elements of system modeling:– Inputs– Processes– Outcomes.