Jackson System Developments

Jackson System Development JSD evolved out of work conducted through M.A. Jackson JAC75, JAC83 on information its relationship and domain analysis to program and system design. Same is some ways to Warnier's   approach and DSSD JSD focuses on models of the real world information domain. In Jackson's words the developer start through creating a model of the reality with which the system is concerned the reality which furnishes it's the system's subject matter...

To conduct JSD the analyst applies the following steps are used that is:

Entity Action Step:  While using an approach which is quite same to the object-oriented analysis method entities people objects or companies in which a system wants to produce or use information and actions the events which occur in the real world which affect entities are identified.

Entity Structure Step: Actions which affect each entity are ordered through represented and time with Jackson Diagrams a tree-like notation

Initial Modeling Step: Action and Entities are represents as process model connections among the model and the real world are described.

Function Step: Functions which correspond to describe actions are specified.

Implementation Step:  Hardware and software are specified as a design. The last 3 steps in JSD are closely aligned with system or software design.