OSSAD

The method OSSAD is a method of analysis of organization by the processes

Initials OSSAD mean: Office Support Systems Analysis and Design.

This method is based on several models

  • the Abstract Modèle

    • It describes the objectives of the organization, independently of the means and the resources implemented to reach that point.
    • It represents the functions (name given to the processes) of the organization (ex: marketing, production) and the packages of information which they exchange (ex: statistics, contracts). A function is decomposable in sub-functions (under process). The not broken up functions are called activities.
    • It answers the questions WHAT? and WHY?

  • the Descriptive Modèle

    • It the human means and the technological resources of the organization
    • It the procedures of the organization (= manner of carrying out an activity), as well as the roles (= which takes part in which activity represents describes) and the resources implemented (= with what the activity is carried out)
    • It answers the questions WHICH? and HOW?
    • It is composed of three types of graphic formalisms
      • the matrices activities/roles
      • the graphs of circulation of the resources of information (model of roles and procedures)
      • the graphs of operations

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