Concrete reinforcing requires coordination among many roles: structural engineer, estimator, detailer, fabricator, installer and others. The methods used to define and represent concrete reinforcement elements and assemblies in building information models is crucial in determining the efficiency of sharing data among BIM platforms and the effectiveness of using the carried data in production pl...

Based on credibility theory and two-stage fuzzy optimization method, this paper presents a type of multi-product multi-period (MPMP) production planning model. Since the proposed production planning problem includes fuzzy variable coefficients with an infinite support, it is infinite-dimensional optimization problem. The approximation of the production planning problem is discussed, and the con...

Due to the pressure of rising costs and an increase in customer orientation, IT-service providers are forced to professionalize their operations (IT-Production). Using Enterprise Resource Planning (ERP) systems common in real goods production allows to take advantage of planning functions and integrated data management. Since the production planning of IT-Production cannot be addressed by stand...

Production planning is a key area of operations management. An important methodology for production planning is mathematical programming. Traditional mathematical programming models for production planning are deterministic, and cannot provide robust production plans in the presence of uncertainty. As such, deterministic planning models may yield unsatisfactory decisions. Stochastic programming...

Bei der Fabrikplanung ist die Produktionslinienplanung von hoher Komplexität geprägt und mit herkömmlichen Methoden nicht zufriedenstellend lösbar. Das Problem lebt im hochdimensionalen Raum muss dort gelöst werden. Dieser repräsentiert Eigenschaften Produkte, zugehörige Produktionsprozesse betriebswirtschaftliche Aspekte. Es wird ein Konzept zur automatisierten Linienplanung inklusive Montager...

The semiconductor manufacturing process usually consists of four main production stages: wafer fabrication, probe, assembly, and final test. This paper considers the lot-sizing and scheduling problem in the assembly stages. A hierarchical solution approach is outlined with focus on the first of three suggested phases, namely the bottleneck lot-sizing and scheduling phase. The approach integrate...

In the planning phase of every construction project, layout of temporary facilities is a crucial task; site layout can affect safety, travel cost and time, construction productivity, and space utilization. However, site layout planning can be a complicated problem, due to the interdependency of influencing factors. Although interaction among activities is one of the major drivers of site layout...

Multiproduct manufacturing facilities running on a campaign basis are increasingly becoming the norm for biopharmaceuticals, owing to high risks of clinical failure, regulatory pressures and the increasing number of therapeutics in clinical evaluation. The need for such flexible plants and cost-effective manufacture pose significant challenges for planning and scheduling, which are compounded b...