A large-scale chemical production site consists of multiple production and utility plants that are interconnected with utility and material-flow networks. The idea of having an integrated mathematical model (site-model) to assist in site-wide operations and development is gradually being accepted by the industry. This paper presents some experiences in constructing a site-model based upon simpl...

This paper reports a construction site intervention that is part of a research program devoted to the topic of production control in multi-story building construction. An early work by the authors introduced a preplanning method using the line of balance technique. This present work aggregates some tools previously used such as the Last Planner and Lookahead planning in order to develop a produ...

tendency to optimization in last decades has resulted in creating multi-product manufacturing systems. production planning in such systems is difficult, because optimal production volume that is calculated must be consistent with limitation of production system. hence, integration has been proposed to decide about these problems concurrently. main problem in integration is how we can relate pro...

tower cranes are major and expensive equipment that are extensively used at building construction projects and harbors for lifting heavy objects to demand points. the tower crane locating problem to position a tower crane and supply points in a building construction site for supplying all requests in minimum time, has been raised from more than twenty years ago. this problem has already been so...

With globalization and rapid technological-economic development accelerating the market dynamics, consumers' demand is becoming more volatile diverse. In this situation, capacity adjustment as an operational strategic decision plays a major role to ensure supply chain responsiveness while maintaining costs at reasonable norm. This study contributes literature by developing computationally effic...

As the economic environment continues to change rapidly, so does the demand placed on industries to meet ever expanding orders. In order to meet this demand, the need to expand is matched by the need to utilize existing facilities, and increase efficiency. As a result, conventional order management programs often no longer suffice. Single-site planning has developed into multi-site planning, le...

introduction: cleaner productions in textile industry is achieved by reducing water and chemicals’ consumption, saving energy, reducing production of air pollution and solid wastes, reducing toxicity and noise pollution through many solutions. the purpose of the present research was to apply strengths, weaknesses, opportunities, threats (swot) and quality systems planning matrix (qspm) techniqu...

In this contribution we apply different approaches to solve four rather different MINLP problems: special extensions to time-indexed formulations of production planning problems, a production planning problem in BASF’s petrochemical division, a site analysis of one of BASF’s bigger sites, and a process design problem. The first problem is related to a useful nonlinear extension of production pl...