Maria Lourdes C. Capilitan

SysAnal(O0A)

July 15, 2008

Book Review

Systems Analysis and Design Methods

(Fourth Edition)

Jeffrey L. Whitten and Lonnie D. Bentley

QA 76.9 S88 W48 1998

Quote (Chapter VI):  In systems analysis it is focus exclusively on logical process modeling as part of business requirements analysis. 

            Application process model is a process model for a system.  Logical models have focus on process and a system owner/user perspective.  They are typically constructed as deliverables of the study and definition phases of a project.  While logical process models are not concerned with for  implementation details or technology, it may be constructed from existing software, which is physical process model of a current system.

Ø      Analyst will build a physical process model of current system which is a logical model current system and logical model of the target system.

Ø      Modern structured analysis strategies focus on logical model of the target system w/c is being developed.

Ø      Event partitioning is organizing a commonsense strategy.  It also factors a system into subsystems based on business events and responses to the event.

Strategies for event driven process modeling:

1.       System context diagram is constructed to establish initial project scope.

2.      Functional decomposition diagram it is drawn to partition the system into logical subsystems and functions.

3.      Event- response list is compiled to identify and confirm the business events to which the system must provide a response.

4.      Event handler it is added to decomposition diagram for each event.  It also serves as outline for system

5.      Event diagram – it is constructed validated for each event.

6.      System diagram constructed by merging event diagrams.

7.      Primitive diagram constructed for each event process.