Link: AGV simulation of part routings in AnyLogic.Link: ProModel AutoCAD simulation edition.Link: Simulation methods for SCM analysts.Link: Open-pit mine simulation for better planning.Link: Simmer in R for discrete-event simulation.Link: Visual Components financial KPI simulation.Link: Receival inspection simulation with simmer.Link: Backlog simulation of FIFO production.Link: Discrete-event simulation procedure model. ![]() ![]() Link: Manufacturing simulation for plant design.Link: Parking lot simulator with simmer in R.Link: Machine learning and discrete-event simulation.Link: Simulation-based capacity planning.If you are interested in simulation modeling and AnyLogic you might also find some of the following articles interesting: In this case the focus was on the throughput capacbilities of the horizontal yard crane. A model of this kind is appropriate for e.g. I presented a simple crane yard simulation model without individual part tracking. If I want to prioritize putaways over retrievals, or implement some other logic related to task prioritization, I could do that with JAVA functions, too. On arrival of a new agent in the retrieval source the selection() function is called. However, they are merely used as temporary memory. Sourcebay and targetconveyor are also variables in the main model itself. To make this easier I placed these two variables inside the custom part agent class. Retrieving parts from the yard and assigning them to a conveyorįor modeling part retrieval from the storage yard a sourcebay (source node), from which a part is to be retrieved, and a targetconveyor, on which the part is to be placed, have to be specified. AnyLogic then seizes the crane and executes the transport to a random attractor within the specified node. It does so by setting the variables targetbay_01/ targetbay_02. This function simply decides which node (1 to 7), referred to as “bay”, the part should be stored in. Next, a small custom function is called ( allocation_01/ allocation_02). The probability of each inlet conveyor is 50%. This new part is located on one of the inlet conveyors using the logic blocks convey_a and convey_b. Starting with the production – putaway process: This is implemented in below sequence of logic blocks.Ī part is created by the source (agent of custom class part). that has to be retrieved, it must be decided which conveyor the part should be placed onĪssigning parts to a storage location for putaway For a part that has to be delivered to a downstream process, i.e.For a part that arrives on one of the inlet conveyors it has to be decided where in the yard the part should be stored.In this crane yard simulation model two allocation decisions have to be made: Implementing storage slot and conveyor allocations The focus is on assessing maximum possible throughput of the yard crane. ![]() The dwelling of parts in the yard is not modelled. This is the retrieval – shipped process in above logic block section. Retrievals from the yard are implemented as a separate process, utilizing the same yard crane. ![]() This is the production – putaway process in above logic block section. That means a part is put away in the buffer whereup it is destroyed. As stated in the introduction of this article individual part tracking is not part of the model. Has anyone come across this problem before? I'd appreciate your help.It is a simple model that can be constructed in 1 hour. I've spent 3 days searching stack overflow and gitHub without much success. I confess I'm not a Java guru so I'm likely missing a basic step here. list(storage_locations.loc_id, storage_locations.loc_q) How do I convert the String value into a Queue name? Queue q = null Of course this results in a type mismatch error. You'll notice the second line of the 'for' loop tries to populate the q variable (Queue) with the value from the "loc_q" column in the database (String). Here's a sample of the offending function. However as the database stores values as strings I need to convert the queue name value retrieved from the database query (String) to an object variable name. At start-up the model needs to create a collection (LinkedHashMap) that will map the location name (Key) (String) with its Queue name (Value). The model also has database table that links the unique name of each location (String value) with the name of a Queue object representing the location in the model. The model loads the current inventory at start-up as an agent population including a parameter that identifies the location of each agent. The items being stored are stacked on top of each and need to be retrieved in a LIFO fashion. I am building an AnyLogic model of a large storage facility (like a container terminal) that has hundreds of storage locations over a number of areas.
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