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Distribution warehouses are considered in this paper with the aim of scheduling the transportation of pallet and roll pallet loads from the storage area to the gates at which the trucks arrive. Transportation activities are carried out by forklift AGVs that can move freely along the warehouse's aisles (guide paths are not considered). In this paper, an optimization procedure is proposed, which is...
Industrial processes use energy to transform raw materials and intermediate goods into final products. Many efforts have been done on the minimization of energy costs in industrial plants. Apart from working on “how” an industrial process is implemented, it is possible to reduce the energy costs by focusing on “when” it is performed. Although, some manufacturing plants (e.g. refining or petrochemical...
The purpose of this paper is twofold: to depict the patient's journey in operating block of the hospital and to provide a flexible model that matches the reality. In operating block of Jeanne de Flandres Hospital, a daily meeting is held in order to establish the operations that will occur the next day. Organizing a schedule in these circumstances leads to a loss of time and can often lead to conflictual...
Mixed-criticality and high availability distributed systems, like those on large industrial deployments, strongly rely on deterministic communication in order to guarantee the realtime behavior. The time-triggered paradigm-as in TTEthernet-guarantees the deterministic delivery of messages with fixed latency and limited jitter. We look closely at industrial deployments in which production as well as...
In this paper, we propose a hybrid scheduling algorithm based on renewal process with the awareness of energy consumption in real-time systems. This algorithm overcomes overlapped jobs in multi-task systems by modeling time duration of jobs in a certain task as ON/OF renewal process with the consideration of energy consumption. The positive effects of this approach can not only be extended to the...
In this paper, scheduling of robot cells that produce multiple object types in low volumes are considered. The challenge is to maximize the number of objects produced in a given time window as well as to adopt the schedule for changing object types. Proposed algorithm, POPStar, is based on a partial order planner which is guided by best-first search algorithm and landmarks. The best-first search,...
Manufacturing enterprises can only stay profitable if they manage to flexibly respond to changes in markets by adapting their products, product variants, and product volumes. To support such variety in products, we suggest a capability-based approach for production planning and scheduling. Production plans and machines are described in terms of required capabilities and provided capabilities respectively...
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