A new method is developed for a fast identification of the stability situation of industrial processes. The proposed method includes two factor ratios of the control constants for the upper and lower control limits to process these constants. An indication ratio is then defined as the ratio of the maximum data range value to the difference between the maximum and average values for individual d...

Followed by changing environment and global competition, performance of enterprises in allocating more market share to themselves has shaped to be a strategic issue for most of competitive enterprises including production companies. In that case suggestion of a new method or methods that increases the performance of production companies, especially in their production speed, can be critical fac...

The aim of this study is to obtain a dynamic modelling and simulation of a Portuguese industrial integrated system composed of three different processes. This work includes the analysis of the optimal integration of the different units, and the study of the effect of some operational and atmospheric conditions on the system to maximize its global thermal efficiency. The cogeneration system was ...

Individuals base decisions on their surroundings and change their minds based on the action of others and interactions with the environment. Current Cellular Automata techniques for modeling pedestrian movement predetermine the individual’s goals and do not change them throughout the execution of the simulation. To allow the individuals to make decisions as the simulation progresses a technique...

The chemical process industry aims particularly at energy, capital expenditure and variable feedstock cost savings due to fierce global competition, the Kyoto Protocol and requirements for sustainable development. Increasingly conceptual process design methods are used in the industry to achieve these aims. They are used in: • existing processes to renew parts; • process re-designs based on exi...

Because of the recent increase in the gas price and interest in environmental issues, the demand of ethanol as substitute of gasoline is rapidly increasing. Basically, 5 steps are included in ethanol production composed of grinding, cooking, fermentation, distillation, and hydration. In each step, there are several ideas to improve its productivity and benefitablity. In this paper, I put some e...

This paper describes a method for creating reusable processes and our experience using them in an industrial environment. A notation and process for creating and tailoring reusable processes is described and applied to the building of a 120 process library at PRC Inc. initial data collected on use of the library indicates large potential payo#s from process reuse such as a 10 to I improvement i...

The urea reactor is one of the most important units in the urea synthesis process. Rigorous simulation of the urea reactor is necessary and significant. Ho,wever, the complicated thermodynamic system and chemical reactions result in difficulties of modeling and simulation. In this work, the urea reactor is considered as a critical gas-liquid concurrent fluid reactor, in which some perforated pl...

| This paper discusses the problems that a software development organization must address in order to assess and improve its software processes. In particular, the authors are involved in a project aiming at assessing and improving the current practice and the quality manual of the \Business Unit Telecommunications for Defence (BUTD)" of a large telecommunications company. The paper reports on ...