https://github.com/ejw-data/sim-elevator

Discrete event simulation of an elevator system using a SimPy model
https://github.com/ejw-data/sim-elevator

discrete-event-simulation python simpy

Last synced: about 1 month ago
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Discrete event simulation of an elevator system using a SimPy model

• Host: GitHub
• URL: https://github.com/ejw-data/sim-elevator
• Owner: ejw-data
• Created: 2022-09-27T17:03:35.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2022-10-28T06:02:06.000Z (about 2 years ago)
• Last Synced: 2023-03-04T13:09:07.802Z (almost 2 years ago)
• Topics: discrete-event-simulation, python, simpy
• Language: Python
• Homepage:
• Size: 598 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# sim-elevator

Author:  Erin James Wills, [email protected]  

![Elevator Simulation](./images/elevator-simpy.png)  

Photo by Sung Jin Cho on Unsplash




## Overview  

  

Discrete event simulation of an elevator system using the simpy library.   


### Phase 1

- Developed procedural model using functions/generators with simpy

- Works with only one elevator correctly

- Model is getting complex due to chaining functions and passing function parameters

### Phase 2

- Converted procedural model to object oriented

- Reduced code complexity

- Works only with one elevator correctly

### Phase 3

- Updating model to work with multiple elevators

- Initial thought was to create dictionary holding elevator information and floors but does not look promising

- Looking at other options.

### Phase 4  

- Found several options from documentation and stackoverflow.  

- Initially tried using simpy.Store but having issues integrating into existing code and determining effect.

- Creating simple model to test functionality and then will integrate into existing OOP version.

- New file called `scheduling_test_store.py`.  

- After several tries, using `simpy.FilteredStore` method works but only when combined with `simpy.Resources`.  My method uses the Resources method to allocate resources upon request and upon making a request the FilteredStore method allocates a name and other properties to the model.  The big picture idea is that I am doing two checkout steps - checking out an elevator resource and at the same time checking out an available elevator data store.  Before the request is checked in, I checkin the store so the two checkout systems are synchronized.  I can use this method to pass specific parameters related to that elevator or update those parameters and I can customize which elevator is selected at the store level (in many scenarios); thus, allowing custom logic for elevator activity.  

### Phase 5 (current)

- Integrated `scheduling_test_store.py` verified method into main script - `elevator_oop.py`.  

- Need to validate results

- Need to clean printout results

- Need to store trip results as dataframe or csv




## Technologies    

*  Python




## Data Source  

No external data was used for this project.  All numbers used were estimates or randomly selected.




## Setup and Installation  

1. Environment needs the following:  

    *  Python 3.6+   

    *  simpy

    *  random

1. Activate your environment

1. Clone the repo to your local machine

1. Navigate the terminal to the repo folder

1. In the terminal, run `python elevator.py`