The dynamics of the interaction between different levels in production system is the study of many research groups to seek a better understanding of the complex nature of such systems to propose an effective and efficiency from rational use of available resources and required inputs. Demand for products increasingly customized by a dynamic and competitive market has reduced considerably the life cycle of such products and flexibility of production processes has become essential for companies. Flexibility is not only one attribute, but a set of attributes that provides the flexibility for production systems. The interactions between the flexible sub-systems are sources of waste and rework, causing high costs in the production process. In this sense, the concept of Lean Manufacturing has promoted a restructuring of some processes of the MES (Manufacturing Execution Systems), responsible for managing the activities of production, integrate data from the ERP (Enterprise Resource Planning) and synchronize production tasks the flow of materials, making them oriented by the demand. One other important aspect in the industrial context is the new future vision promoted by Industry 4.0 paradigm that is envisioned a complete decentralization of control of the production system by autonomous and intelligent devices interconnected by a communication system, that contribute to the global goals of the enterprise. The ANSI/ISA S95 presents a conceptual model that may contribute to the implementation of the industry 4.0 concept. The objective of this study is to present a proposal for modeling of objects in level 3 of the S95 standard using interpreted Petri nets.
A Deus pela oportunidade e estímulo nos momentos mais difíceis. Ao meu orientador, Prof. Dr. Ricardo Yassushi lnamasu, pela amizade e constante apoio, desde a época de estagiário da Embrapa. Ao Prof. Dr. Arthur José Vieira Porto, pela confiança e amizade. Em especial ao amigo Edilson R. R. Kato pela inestimável contribuiç ão do inicio ao fim, ao Elidio Lobão e a Creusa Sayuri Tahara pelo companheirismo e apoio irrestrito na elaboração dessa dissertação.
Miyagi, pela oportunidade, confiança, muita paciência e incentivo em todos os momentos. Agradeço imensamente ao orientador Prof. Dr. Diolino José dos Santos Filho pela ajuda pessoal desde o primeiro dia que o conheci e pelas inúmeras dificuldades que passei, sou muito grato pelos constantes incentivos e muita paciência.
Part 6: Petri NetsInternational audienceThe evolution of tool-machines shows a trend for integration of different machining functionalities such as, milling, turning, and drilling, on a same machine. These machines are result of the mechatronics development that allows the aggregation of different functionalities into a unique machine (named multifunctional machine tool - MMT). However from the point of view of the production process there is a limitation of the conventional process control solution, i.e., when the systems are composed by MMTs, their functional flexibilities are considered only during scheduling and encapsulated at this level, and during the process execution, MMTs are viewed as traditional ones. Then, the multi-functionalities are not explored for resources allocation. Thus, a new process control approach is proposed here to dynamically allocate the resources exploring the functional flexibilities of MMTs
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