Main Automation Contractor (Mac): The Technical Analysis Of Supplier Based On Ahp (Analytic Hierarchy Process) Multi-Criteria Methodology

CATEGORY: AUTOMATION

VIII Congresso Nacional De Excelência Em Gestão, 8-9 June, 2012

Main Automation Contractor (Mac): The Technical Analysis Of Supplier Based On Ahp (Analytic Hierarchy Process) Multi-Criteria Methodology

Carlos Eduardo Barateiro (UFF) João Carlos Correia Baptista Soares de Mello (UFF) José Rodrigues de Farias Filho (UFF) Luiz Antonio da Paz Campagnac (UFF)

Introduction

According to ALGAFFAS (2007), "the automation systems for process control represent between 3 to 5% of the plant value and the inadequate design or its poor implementation can increase this value from 10 to 25% - but the automation system can represent 100% of inactivity in the same plant if the project or its configuration is not appropriate”. In other words, automation has a major impact not only on the total investment cost - CAPEX (Capital Expenditure) for the implementation of the plant, but also on the cost of its own operation - OPEX (Operational Expenditure), after the beginning of its activities.

Vorster et al. (1998) published a study for the Construction Industry Institute at the University of Texas, Austin (USA), showing the importance of early strategic purchases before the definition of who will be responsible for the project construction (contractor). The study considered the hiring based on the model EPC (Engineering, Procurement and Construction) - building model in which a single company is responsible for engineering, procurement of materials and equipment, installation, commissioning and project start up. This study showed gains in terms of cost, time and resources to the project, mainly due to the uncertainty reduction in the initial project development. The industry has named this model PEpC (Procurement, Engineering, procurement and Construction) by the fact that the most important purchases (strategic) must be carried out even before the full definition of the EPC company - this concept is currently used in the oil and natural gas and a good example is the purchase of large compressors for the oil platforms after the completion of basic engineering.

Based on this concept, BARATEIRO (2011) showed that the industrial automation of petrochemical plants should be considered as a strategic item on the PEpC model. BARATEIRO (2011) also showed that the hiring of automation should follow the purchasing model in which a single company is responsible for the specification and supply of all instruments and final control elements, communication interfaces and control rooms, as well as the commissioning and start up of all automation systems. The industry has named this hiring model MAC (Main Automation Contractor) and it has been used in large oil refinery projects. In Brazil, we can mention as examples the use of this model in the Petrochemical Complex in Rio de Janeiro (COMPERJ) and the Refinery Abreu e Lima (RNEST).

BARATEIRO (2011) presented a model for the choosing of the automation supplier that could maximize the investment on construction and operation project. In this model the choice of the best solution was based on the best proposal that is not necessarily the lowest price. To achieve this, BARATEIRO (2011) has proposed a bonus in the price based on the better technical analysis, that is, the better technical evaluation allows the supplier to have price compensation. For this, he has conducted an extensive field research with several market players getting the critical success factors for the supplier technical qualification.

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