Supply air/water temperature:.
Some aspects of the process were fixed, such as the quantity of welding stations and the routing of specific truss types (e.g.truss type A and B can be processed in welding station 1).
Others, for example the painting bays, were left as flexible station areas to allow recording of the capacity over time.. Other input data included:.truss parameters, such as type, dimensions, and other product data.production schedules, to specify the order in which truss types would be made.
throughput and timing data, such as processing times of stations, speed of conveyors and speed of cranes..The data itself was not hard-coded into the model and instead read from an external data file, which made running multiple simulations for differing parameters a rapid process.. Several different scenarios were simulated in the model that were made up from combinations of options.
This included different production schedules and whether transport timings were included, to test sensitivity of the system to these inputs.
We also added scenarios for a +/- 20% variation on process timings (for example, the welding stations), using a triangular distribution.. We defined key outputs to measure performance of the system, including schedule completion time (i.e.The design should accommodate reversible connections, ie things that can be undone and dismantled.
This is particularly important in the superstructure, where traditionally the easiest method of deconstructing is to crush the building..The use of bolted connections on steelwork joints is safer as hot trades such as welding are omitted.
The connections are also quick and easy for less well skilled labour..The joints can be unbolted at the end of the building’s life, potentially with the use of temporary propping.
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