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Enterprise Reengineering
Enterprise reengineering, is a process of bringing improvement to those systems which have been developed as a result of enterprise engineering. Because of this relation enterprise reengineering is considered as an approach within enterprise engineering.

Overview
In a business process to achieve improvements in the measure of performance such as cost, quality services and speed, an organization should conduct self evaluation all the times. The rethinking and change in the business process to achieve the above mentioned milestones is known as enterprise re engineering. Enterprise reengineering is a model based approach which aims towards the improvement of operation performance. The operation direction is determined by the operating strategy whose main purpose is to make plans for how the enterprise can improve its competitiveness.

It focuses on how the activities within the enterprise are carried out and how we can improve them. The reengineering of an enterprise is not done only to reduce the cost in terms of headcount but to create efficient environment, increase the velocity of business and to do more with less resources. Another important aspect of re engineering is to enable your business to compete in the continuously evolving global market.

Assumption for enterprise reengineering
It's very unrealistic to view whole enterprise as a single process, since most of the enterprises are made up of departments and sub deparments. Therefore when modeling for enterprise reengineering, it is therefore necessary to breakdown the enterprise into more managerial and somewhat autonomus pieces. This proposed decomposition of an enterprise is inspired by holonic system theory, proposed by Koestler (1967).[4] According to which, we can decompose an enterprise in to sub departments which have some degree of autonomy; these sub departments can be then treated as smaller version of whole enterprise.

Each sub department can be defined as group of resources (people, machines, computers, facilities) responsible for executing tasks (processing centre) and for making decisions. One thing worth mentioning here is that the sub departments are not completely independent but they are still being controlled by some higher authorities.

Conceptual framework for enterprise reengineering
Enterprise reengineering is a model based approach that aim towards improving the current structure of a system, like how effectively and efficiently the current operation capabilities can be transformed from current operation strategy to new operation strategy. For developing such a strategy, information about current operation capabilities and knowledge about the activities of other competitive enterprises is necessary.

Enterprise reengineering focuses on the main processes that are directly involved in the product and services to the customer or that are in some way necessary for the development of streamline product. Some of most likely objectives required by the modeling and designing the operations are: cost reduction, time reduction, quality improvement and empowerment.

Enterprise reengineering methodology
The enterprise reengineering methodology is proposed to structure enterprise reengineering efforts and is based on the strategic framework for enterprise reengineering. This methodology includes an iterative and stepwise approach to increase the competitiveness of an enterprise. It consists of five parts and a short description of each is given below.

Strategic Planning
Strategic Planning involves understanding and revising business objectives, determining the current strategy of operations, analyzing the gap between current capabilities and market requirement and revising the operations strategy and specifying some targets for operations.

Mapping and Analysis
Mapping and Analysis is the study of current enterprise operations, for example how they carried out, allocation of resources and indentifying the possible areas that can be improved. Interviewing people, reviewing the documentations and analysis the numerical data like sales report, inventory reports etc… are some ways to collecting data about the current enterprise operation. This data is then used to create the AS-IS model of the enterprise. This model is then analyzed to indentify the possible improvement areas which should be taken care of in design and implementation phase.

Design and Implementation
Implementation is the phase in which changes identified in future (to-be) model during the strategic planning phase should be realized. The AS-IS model developed in design and implementation phase and the identified improvement areas are being analyzed in this phase and that knowledge about operation should be used to realize the changes indentified during phase one. This phase covers the improvement initiatives and these initiatives should be organized and managed in order to synchronize activities in time and use resources effectively.