Week 8

Week 8

Reflection

Lecture 4/12/2012     

            Today we continue studying types of IS: TPS, MIS, DSS, ESS, and ES.   

• TPS: is the backbone of an organization’s information system. It is used to enter, store data from business transaction.
•  MIS: Management Information System. It produces report data from TPS system.
  Used by middle manager (Tactical manager). Example, supervisor or manager of department. MIS input (TPS) output (Report)
  MIS provides manager information operation of so that they can control, organize plan.
• DSS: Decision Support System. It provides flexible tools for analysis, making decision and analyses data from TPS system, making decision on unstructured/unprogrammed.

 

•   ESS/ES: Executive Support System/ Expert System. It is used by the top manager of an organization, use for long term plan/ project.

Lecture 5/12/2012

Today we learned about ISD (Information System Development)

          ISD is a conceptual model use in project management that describes the stages involves in an information system development project.

          ISDM (Information System Development Methodology) contain model and tell you what “step” to take and how to develop information system.

          A Methodology is a collection of 

• Procedure
• Tools
• Documentation aids

     When you apply ISDM?

a.     problem with existing system

b.     Desire to introduce new system

c.      Change in market/ external environment

d.     merger or acquisition

Participant in System Development

 

Planning

TYPE OF ISD METHODOLOGIES  

There are any different types of ISD methodology. They are 

1)    Gane and Sarsons (STRADIS

2)    Information Engineering (IE

3)    Jackson System Development

4)    Prototyping/ iterative approach

5)    Structured approach (SDLC

6)    Soft Systems Methodology (SSM)

7)    ETHICS

               8) Structured Systems Analysis and Design (SSADM)

Stradis is the same as Jackson System Development and they are related to each other.

  STAGE IN STRADIS

 

 

IE: Information Engineering

 Stage:

 

Prototyping 

 Stage

Structure Approach (SDLC)

 

•         The oldest and most known methodology used to coordinate the efforts of information systems development is known as the “Waterfall”.

•         The model is based on a set of generic life cycle stages to guide developers from an initiating through maintenance of the completed systems.

•         is defined as the process (as a whole) of developing system or software to meet certain requirements.

•         It covers many activities starts from understanding why the system should be built, studying the project feasibility, analyzing problems, choosing the system design and architecture, implementing and testing it, up to delivering the system as product to the use

SDLC Stage