Simulation of a productions line system with machine breakdowns using PERT network modelling

Modelling and Experimental Study of Wax Deposition in Transportation Line Using a Flow Loop System

assessment of the efficiency of s.p.g.c refineries using network dea

data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...

Scheduling with Unexpected Machine Breakdowns

We investigate an online version of a basic scheduling problem where a set of jobs has to be scheduled on a number of identical machines so as to minimize the makespan. The job processing times are known in advance and preemption of jobs is allowed. Machines are non-continuously available, i.e., they can break down and recover at arbitrary time instances not known in advance. New machines may b...

Classification analysis for simulation of the duration of machine breakdowns

Machine failure can have a significant impact on the throughput of manufacturing systems, therefore accurate modelling of breakdowns in manufacturing simulation models is essential. Finite mixture distributions have been successfully used by Ford Motor Company to model machine breakdown durations in simulation models of engine assembly lines. These models can be very complex, with a large numbe...

2000: Pert Scheduling with Resources Using Qualitative Simulation Graphs

The Qualitative Simulation Graph Methodology (QSGM) is well suited to address the PERT scheduling with resources problem. The coverage property of QSGM has two important implications for the PERT scheduling problem. First, it means that all possible schedules are represented. Second, it means that, as long as the delay time intervals are not violated, we can characterize all possible outcomes o...