1 Pertemuan 1 Pendahuluan : Konsep Sistem Matakuliah: H0204/ Rekayasa Sistem Komputer Tahun: 2005 Versi: v0 / Revisi 1

2 Learning Outcomes Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : Menjelaskan definisi konsep kehandalan sistem

3 Outline Materi Definisi Sistem Elemen Sistem Klasifikasi Sistem Transisi Machine Age – System Age

4 Definisi-definisi Systems Definition[Blanchard]:  an assemblage or combination of elements or parts forming a complex or unitary whole, such as a river system or a transportation system  any assemblage or set of correlated members, such as a system of currency  a coordinated body of methods or complex scheme or plan of procedure, such as a system of organization and management

5 The Elements of a System Components - operating parts of a system (input, process, and output) Attributes - properties or discernible manifestations of the components of a system Relationships - links between components and attributes

6 Systems and Subsystems If two hierarchical levels are involved in a given system, the lower is called a subsystem A total system, at whatever level in the hierarchy, consists of all components, attributes, and relationships needed to accomplish an objective.

7 Classification of Systems Natural and Human-Made Systems Physical and Conceptual systems Static and Dynamic Systems Closed and Open Systems

8 Transition and the Systems Age - The Machine Age (1) The way people understand the world around them:  Reductionism - reduce, decompose or dissemble anything into simple parts  Allows for an analytical way of thinking »Take apart that to be explained »Explain the behavior of the parts »Aggregate the explanations to explain the whole

9 Transition and the Systems Age - The Machine Age (2) The way people understand the world around them:  Mechanism Explain phenomena by using the relation of cause and effect

10 Transition and the Systems Age - The Systems Age  1940s - end of Machine Age, begin Systems Age  Doctrines of reductionism and mechanism replaced by:  Expansionism - all objects/events and experiences of them are parts of larger wholes. Focus is on wholes (systems). More interest in putting things together than taking them apart.  Teleologism - preoccupied with systems that are goal seeking, or purposeful

11 Engineering in the Systems Age Must be a team activity where various individuals are cognizant of the important relationships between specialties Technical expertise must include knowledge of engineering and knowledge of domain