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Bei allen Achsenfehlern rund um das Kniegelenk empfiehlt sich eine standardisierte Herangehensweise, die die in der Übersicht aufgeführten Punkte adressiert.
We develop an MILP formulation for the short-term scheduling of an industrial make-and-pack plant producing consumer goods. We address a case study which includes sequence-dependent changeover times, heterogeneous storage units with finite capacities, quality release times, batch splitting, partial equipment connectivity, and transfer times. The planning problem consists in minimizing the production...
Enforcing privacy and security by appending filter criteria is a well-known, powerful technique known in SQL-based access. We extend this approach to image access, based on an SQL-style declarative raster query language. We show how some constraints useful in privacy and security enforcement can be expressed, and some can not due to the intrinsic nature of geo imagery. We identify problems and suggest...
Array-like structures constitute a significant share of scientific data. As arrays are not adequately supported as first-class citizens in traditional database systems, array DBMS technology has emerged offering bespoke query and storage support. On physical level, one challenge in such systems is to find performance efficient partitionings ("tilings") of large, multi-dimensional arrays...
Widely-used software packages for project management like Microsoft Project apply simple priority-based procedures for scheduling of resource-constrained projects. Various studies have shown that these procedures perform relatively poor when compared against state-of-the-art procedures. In this paper, we present a scheduling heuristic for Microsoft Project which generates a series of initial schedules...
Commercial software packages for project management apply proprietary, heuristic procedures for resource-constrained scheduling. We analyze the scheduling performance of seven such packages. Three of them offer the possibility to select the priority rule to be used for the resource-constrained scheduling procedure. The project duration obtained strongly depends on this rule. Some packages know several...
Many reasons may call for an orchestrated response computation to some geo service request: distributed data; specialized services (such as reprojection) are not available on the node addressed; heavy-weight jobs suggest distributed processing; and several more. Typically such orchestrations today are performed manually in advance. When it comes to the particularly interesting case of heavy-weight...
When project managers determine schedules for resource-constrained projects, they commonly use commercial project management software packages. Which resource-allocation methods are implemented in these packages is proprietary information. The resource-allocation problem is in general computationally difficult to solve to optimality. Hence, the question arises if and how various project management...
Interpreted languages frequently suffer from higher processing times as compared to compiled approaches. Typically this happens when complex computations are performed. Array DBMSs, which extend database functionality with multidimensional array modeling and query support, find themselves in exactly this situation: queries often involve a large number of operations, and each such operation is applied...
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