Monday 24 August 2015

Technical Architecture

SAP is an ERP package, which caters to the key function of integration. It provides integrated functionality for finance, sales, materials management, production and human resources.

SAP is DBMS transactional software written in ABAP/4. Various modules provide various functionalities. It can be configured to meet the business process logic through customisation. SAP is customisable software. The database in SAP can be either Oracle or Informix.

Technical Architecture (refer diagram a)

The technical architecture of SAP R/3 is as per the diagram. The Technical Architecture of SAP R/3 is a three-tier architecture. This means that the architecture can be broken down into three layers. First is the Data base Layer. The Database layer hosts the central database. The central database is a Relational Database Management System (RDBMS). The next layer is the application layer. The business logic processing occurs in the application layer. The presentation layer is the Graphic user interface or the GUI, which interacts with the user and receives inputs and gives output to the user.

SAP recommends four concurrent Servers:

To have better control over the production system, SAP recommends four different servers in a typical SAP implementation. These are:

Development: All development work is carried out in the development server. Unit

testing is done in the development server.

Integration: The changes are then tested for their correctness by integration testing in the integration server

Consolidation: The consolidation system consolidates all the changes before they

are transported to the production environment.

Production: The production system is the live system which contains all the current data.

Technical Information - SAP

SAP is a 32 Bit Client Server Application.

SAP uses 4GL (4th Generation Language) called ABAP/4 for Front end Development

ABAP/4- Advanced Business Application Programming Language

Uses ALE (Application Link Enabling)

Loose Coupling of Database

Independent Servers

SAP uses Messaging Mechanism to Synchronize database

IDES - Integrated Documentation and Educational System. IDES contains example data for all transactions.

OSS - Online Support System. This is an Online Support System provided by SAP.

Modules in SAP

SAP is divided into various modules that cater to different functionalities. The various modules of SAP are as follows:

Sales and Distribution

Project Management

Materials Management

Quality Management

Finance and Controlling

Human Resources

Production Planning
Plant Maintenance