MIS Notes - 02:09 Chapter 1: Introduction To Systems...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
02:09 Chapter 1: Introduction To Systems Analysis and Design I) System A) A system is an interrelated set of business procedures used within one business unit working together for a purpose B) A system has 9 Characteristics B.1) Components B.2) Interrelated Components B.3) Boundary B.4) Purpose B.5) Environment B.6) Interfaces B.7) Constraints B.8) Input B.9) Output C) A system exists within an environment D) A boundary separates a system from its environment E) Important System Concepts E.1) Decomposition E.1.a) The process of breaking down a system into smaller components E.1.b)Allows System Analyst to:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
E.1.b.i) Break a system into small, manageable subsystems E.1.b.ii) Focus on one area at a time E.1.b.iii) Concentrate on component pertinent to one group of users E.1.b.iv) Build different components at independent times E.2) Modularity E.2.a) Process of dividing a system into modules of a relatively uniform size E.2.b)Modules simplify system design E.3) Coupling E.3.a) Subsystems that are dependent upon each other are coupled E.4) Cohesion E.4.a) Extent to which a subsystem performs a single function II) Information System A) What are Information Systems? A.1) Combinations of hardware, software, telecommunications networks and procedures that are constructed and utilized by people to collect, create, retrieve, manipulate, and distribute data in/across organizing B) Types of Information Systems B.1) TPS (Transaction Processing Systems) B.1.a)Inputs are transactions processing includes sorting, listing, merging and updating B.1.b)Outputs are detailed reports, lists, summaries, etc. B.1.c)Users are operations personnel, supervisors B.2) MIS (Management Information Systems) B.2.a)Inputs are summary transaction data or high volume data
Background image of page 2
B.2.b)Processing involves running routine reports often using simple models B.2.c)Outputs include summary and exception reports B.2.d)Users are primarily middle managers B.3) DSS (Decision Support Systems) B.3.a)Inputs include low volume data, analytical models B.3.b)Processing is interactive and involves simulations, what- if analysis, etc. B.3.c)Outputs are special reports, decision analyses, response to open-ended queries B.3.d)Users are mainly analytical staff-managers B.4) ESS (Executive Support Systems) B.4.a)Inputs consist of aggregate data from external as well as internal sources B.4.b)Processing is interactive and consists mainly of graphical analysis and simulations B.4.c)Outputs are usually projections, and responses to queries B.4.d)Users are senior managers III) 3 Approaches To IT-Enabled Organizational Change A) Technocentric Approach A.1) IT is seen as the primary cause of resulting in a specific organizational form or structure B) Sociocentric Approach B.1) Changes are believed to occur due to human motives/action, social processes and arrangements in the organizational structure C) Sociotechnical Approach C.1) Changes result from the emergent interactions of IT and other organizational components IV) Software Development Methodologies
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/03/2012 for the course MIS 322 taught by Professor Staff during the Spring '08 term at Washington State University .

Page1 / 21

MIS Notes - 02:09 Chapter 1: Introduction To Systems...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online