5. MERISE STEPS
5.1. MERISE levels
5.1.1. Conceptual level
The conceptual level is to design the SI disregarding all
technical and organizational constraints and these both in terms of data
treatment.
The conceptual level answers the question What? (On what to
do, what with data).
The MERISE formalism used is:
· The Data Conceptual Model (DCM).
· The Treatment Conceptual Model(TCM)
5.1.2. Organizational level
The organizational level's mission is to integrate the
analysis criteria related to the organization studied. The organizational level
will define the notions of temporality, chronology of operations of unity of
place, will define the workstations, access to data bases.
The questions at the level of treatment are:
· Who?
· Where?
· When?
The MERISE formalism used is:
· The Data Organizational Model (DOM).
· The Treatment Organizational Model of Treatment
(TOM).
5.1.3. Logical level
Logic is independent of hardware, programming languages and
data management. This is the answer to the question What with?
The formalism will:
· The Data Logical Model (DLM).
· The Treatment Logic Model (TLM).
5.1.4. Physical level
The physical level defines the actual organization (physical)
of data. It provides technical solutions, such methods of storage and access to
information. This is the answer to the question What?
The formalism used is:
· The Data Physical Model (DPM).
· Physical Treatments and Operational Model (PTOM)
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