computing the time difference between two different activities in processflow

Question

question

Ana Ta asked Sep 21, '17 Jacob Gillespie edited Sep 21, '17

computing the time difference between two different activities in processflow

Hello,

How can I compute the time difference between two different activities in process flow?
In the process flow that I attached, I want to store the time difference between when AGV gets an object from Source and put it on the relevant Queue. Additionally, I also want to compute the time that AGV doesn't have any load on itself. Is there anyonewho can give me some hints?

Thanks a lot,

Software Version:

FlexSim 17.2.1

agv timer

agv-compute-time-difference.fsm (121.1 KiB)

Answer 1 · 2017-09-21T17:21:02Z

Jacob Gillespie answered Sep 21, '17 Jacob Gillespie edited Sep 21, '17

I would use a Statistics Collector and a couple Calculated Tables to do this.

First make a Statistics Collector and subscribe to the On Exit event of the Load and Unload activities. (See the top left of the screenshot)

Then add a shared Event Data Label which sets itself using the counter label on the token. This is to identify which events should be paired with each other. (See bottom of the above screenshot)

Next go to the Data Recording tab and set the Row Creation Mode to Unique Row Values and make it by the counter label.

Make two columns LoadTime, and UnloadTime. Update By Event Dependency for both. Set the value for both to Model.statisticalTime.

Lastly set the Event Dependencies.

Now create two Calculated Tables which will calculate the Transport Time and the Not Loaded Time.

Rick click and select View Table... to see the Statistics Collector and Calculated Tables update their data as the model runs. You can also use a chart to visualize the data from a Statistics Collector or Calculated Table.

Here is your model with the Statistics Collector and Calculated Tables I suggested.

agv-compute-time-difference-edit.fsm

events.png (19.9 KiB)

datarecord.png (24.7 KiB)

eventdependencies.png (5.8 KiB)

transporttime.png (13.1 KiB)

notloadedtime.png (13.6 KiB)

agv-compute-time-difference-edit.fsm (122.5 KiB)