Theodore J. Williams

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This paper describes PERA (the Purdue Enterprise Reference Architecture) and shows its relationships to GERAM (the Generalized Enterprise Reference Architecture and Methodology). PERA was developed at Purdue University during the period 1989-94. GERAM was developed by the IFAC/IFIP Task Force to illustrate that all " complete " enterprise reference(More)
The Fluor Daniel Company, a major engineering consulting and construction firm, is applying the Purdue Enterprise Reference Architecture and Methodology (PERA) to their project work. They have established these methods across a range of industrial areas which the company serves. They have used PERA to present a framework around which much of their current(More)
In recent decades, industrial companies have invested much time and money in enterprise resource planning (ERP) systems and in automation of the process control layer. In our quest to reap the rewards of all these investments, the gap between business automation and process automation is becoming painfully obvious. ERP systems are only valuable if you(More)
The Enterprise Life Cycle is the basis for most Enterprise Integration Architectures being proposed today. A life cycle representation also forms an excellent model of the application methodology which must accompany the architecture to form a complete set of aids for the engineer contemplating an enterprise engineering or related project. As the life cycle(More)